commit 20bfd2cf6b10cabbe7dab89d0b7b4456f676b58d
Author: KanjiG <bauerpgp@gmail.com>
Date:   Tue Jul 28 20:56:05 2026 +0200

    Initial commit: Outlook-competitor desktop mail client
    
    Tauri v2 (Rust backend, React/TypeScript frontend). IMAP/POP3/SMTP core,
    Google OAuth (mail/calendar/contacts sync), CalDAV, local calendar with
    recurrence, rules engine, contacts, tasks, unified inbox, context menus,
    drag & drop, snooze, templates, and more.

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..89ab82b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,33 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Rust / Tauri build output
+src-tauri/target
+
+# Local secrets, never commit
+.env
+.env.*
+*.pem
+*.p12
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
diff --git a/.oxlintrc.json b/.oxlintrc.json
new file mode 100644
index 0000000..6fa991d
--- /dev/null
+++ b/.oxlintrc.json
@@ -0,0 +1,8 @@
+{
+  "$schema": "./node_modules/oxlint/configuration_schema.json",
+  "plugins": ["react", "typescript", "oxc"],
+  "rules": {
+    "react/rules-of-hooks": "error",
+    "react/only-export-components": ["warn", { "allowConstantExport": true }]
+  }
+}
diff --git a/README.md b/README.md
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index 0000000..db750ec
--- /dev/null
+++ b/README.md
@@ -0,0 +1,52 @@
+# Mail Client
+
+Ein nativer Desktop-Mail-Client (Tauri + Rust + React/Tailwind) mit eigenem IMAP-, POP3- und SMTP-Backend. Mehrere Konten (Gmail, Outlook, Yahoo, iCloud, beliebige custom IMAP/POP3-Server), Passwörter liegen im System-Keychain (nicht in einer Datei).
+
+## Setup (einmalig)
+
+Systempakete für den Tauri-Build unter Linux:
+
+```
+sudo apt update && sudo apt install -y libwebkit2gtk-4.1-dev libssl-dev libdbus-1-dev libgtk-3-dev libayatana-appindicator3-dev librsvg2-dev libsoup-3.0-dev build-essential curl wget file pkg-config
+```
+
+Rust-Toolchain: mind. 1.77 (per `rustup`, siehe https://rustup.rs).
+
+## Entwicklung starten
+
+```
+cd mail-client
+npm install
+npm run tauri dev
+```
+
+Das öffnet das App-Fenster mit Hot-Reload für Frontend und Backend.
+
+## Produktions-Build
+
+```
+npm run tauri build
+```
+
+## Konto hinzufügen
+
+Beim Hinzufügen eines Kontos über die Sidebar (`+`) ein Provider-Preset wählen. Für **Gmail** und **Yahoo** wird ein App-Passwort benötigt (nicht das normale Account-Passwort):
+
+- Gmail: Google-Konto → Sicherheit → 2-Faktor-Authentifizierung aktivieren → App-Passwörter
+- Yahoo: Account Security → App-Passwörter generieren
+
+## Architektur
+
+- `src-tauri/src/imap_client.rs` — IMAP (Ordner, Nachrichtenliste, Volltext) via `imap` + `native-tls`
+- `src-tauri/src/pop3_client.rs` — handgeschriebener minimaler POP3-Client (TLS, USER/PASS/LIST/TOP/RETR/DELE)
+- `src-tauri/src/smtp_client.rs` — SMTP-Versand via `lettre` (implizites TLS oder STARTTLS)
+- `src-tauri/src/db.rs` — SQLite-Cache für Nachrichten (Offline-Ansicht, schnelles erstes Laden)
+- `src-tauri/src/accounts.rs` — Kontoverwaltung, Passwörter im OS-Keychain (`keyring` crate)
+- `src/` — React/Tailwind-UI: 3-Spalten-Layout (Sidebar, Nachrichtenliste, Lesefenster) + Compose-Modal
+
+## Bekannte Einschränkungen (MVP)
+
+- POP3 verwendet die Server-seitige Nachrichtennummer als ID (keine stabile `UIDL`-basierte ID) — für ein Minimal-POP3-Setup ausreichend, aber nicht robust gegenüber Nachrichten-Neuordnung zwischen Sessions.
+- Gmail/Outlook/Yahoo laufen über klassisches IMAP+Passwort-Login, nicht OAuth2 (einfacher Einstieg, funktioniert mit App-Passwörtern; für einen "Verified by Google"-OAuth-Flow müsste man eine Google-Cloud-App registrieren).
+- Kein Ordner-Unread-Counter (Sidebar zeigt aktuell 0), keine Volltextsuche, keine Regeln/Filter.
+- HTML-Mails werden in einem sandboxed `<iframe>` ohne Skriptausführung gerendert; externe Bilder werden aber nachgeladen (kein Tracking-Pixel-Blocker).
diff --git a/index.html b/index.html
new file mode 100644
index 0000000..17fda65
--- /dev/null
+++ b/index.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Mail Client</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..db33f0b
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,2468 @@
+{
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new file mode 100644
index 0000000..1966ffe
--- /dev/null
+++ b/src-tauri/Cargo.toml
@@ -0,0 +1,43 @@
+[package]
+name = "app"
+version = "0.1.0"
+description = "A Tauri App"
+authors = ["you"]
+license = ""
+repository = ""
+edition = "2021"
+rust-version = "1.77.2"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+name = "app_lib"
+crate-type = ["staticlib", "cdylib", "rlib"]
+
+[build-dependencies]
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+
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+serde = { version = "1.0", features = ["derive"] }
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+sha2 = "0.10"
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new file mode 100644
index 0000000..795b9b7
--- /dev/null
+++ b/src-tauri/build.rs
@@ -0,0 +1,3 @@
+fn main() {
+  tauri_build::build()
+}
diff --git a/src-tauri/capabilities/default.json b/src-tauri/capabilities/default.json
new file mode 100644
index 0000000..876d0b2
--- /dev/null
+++ b/src-tauri/capabilities/default.json
@@ -0,0 +1,17 @@
+{
+  "$schema": "../gen/schemas/desktop-schema.json",
+  "identifier": "default",
+  "description": "enables the default permissions",
+  "windows": [
+    "main",
+    "compose-*"
+  ],
+  "permissions": [
+    "core:default",
+    "dialog:default",
+    "notification:default",
+    "core:webview:allow-create-webview-window",
+    "core:window:allow-close",
+    "core:window:allow-set-focus"
+  ]
+}
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diff --git a/src-tauri/src/accounts.rs b/src-tauri/src/accounts.rs
new file mode 100644
index 0000000..7150882
--- /dev/null
+++ b/src-tauri/src/accounts.rs
@@ -0,0 +1,71 @@
+use crate::db::Db;
+use crate::error::AppResult;
+use crate::models::{Account, AuthMethod, NewAccount};
+use keyring::Entry;
+use uuid::Uuid;
+
+const SERVICE: &str = "com.mailclient.app";
+
+fn keyring_entry(account_id: &str) -> AppResult<Entry> {
+    Ok(Entry::new(SERVICE, account_id)?)
+}
+
+pub fn store_password(account_id: &str, password: &str) -> AppResult<()> {
+    keyring_entry(account_id)?.set_password(password)?;
+    Ok(())
+}
+
+pub fn get_password(account_id: &str) -> AppResult<String> {
+    Ok(keyring_entry(account_id)?.get_password()?)
+}
+
+pub fn delete_password(account_id: &str) -> AppResult<()> {
+    let _ = keyring_entry(account_id)?.delete_credential();
+    Ok(())
+}
+
+pub fn create_account(db: &Db, new: NewAccount) -> AppResult<Account> {
+    let id = Uuid::new_v4().to_string();
+    let account = Account {
+        id: id.clone(),
+        label: new.label,
+        email: new.email,
+        username: new.username,
+        protocol: new.protocol,
+        incoming_host: new.incoming_host,
+        incoming_port: new.incoming_port,
+        smtp_host: new.smtp_host,
+        smtp_port: new.smtp_port,
+        smtp_starttls: new.smtp_starttls,
+        auth_method: AuthMethod::Password,
+    };
+    store_password(&id, &new.password)?;
+    db.save_account(&account)?;
+    Ok(account)
+}
+
+pub fn create_google_account(db: &Db, email: String, refresh_token: &str) -> AppResult<Account> {
+    let id = Uuid::new_v4().to_string();
+    let account = Account {
+        id: id.clone(),
+        label: email.clone(),
+        email: email.clone(),
+        username: email,
+        protocol: crate::models::Protocol::Imap,
+        incoming_host: "imap.gmail.com".into(),
+        incoming_port: 993,
+        smtp_host: "smtp.gmail.com".into(),
+        smtp_port: 465,
+        smtp_starttls: false,
+        auth_method: AuthMethod::GoogleOauth,
+    };
+    store_password(&id, refresh_token)?;
+    db.save_account(&account)?;
+    Ok(account)
+}
+
+pub fn remove_account(db: &Db, account_id: &str) -> AppResult<()> {
+    delete_password(account_id)?;
+    db.delete_account(account_id)?;
+    Ok(())
+}
diff --git a/src-tauri/src/caldav.rs b/src-tauri/src/caldav.rs
new file mode 100644
index 0000000..2538e6d
--- /dev/null
+++ b/src-tauri/src/caldav.rs
@@ -0,0 +1,205 @@
+use crate::error::{AppError, AppResult};
+use crate::ics;
+use crate::models::Event;
+use quick_xml::events::Event as XmlEvent;
+use quick_xml::reader::Reader;
+
+/// Everything needed to authenticate a request against a CalDAV calendar
+/// collection. `url` must be the direct collection URL (e.g. Nextcloud's
+/// `.../remote.php/dav/calendars/<user>/<calendar>/`) — this module does not do
+/// principal/calendar-home-set auto-discovery, the user supplies it directly.
+pub struct CaldavCreds {
+    pub url: String,
+    pub username: String,
+    pub password: String,
+}
+
+fn client() -> reqwest::blocking::Client {
+    reqwest::blocking::Client::new()
+}
+
+fn check_status(resp: &reqwest::blocking::Response, action: &str) -> AppResult<()> {
+    if !resp.status().is_success() {
+        return Err(AppError::Other(format!("CalDAV {action} fehlgeschlagen: HTTP {}", resp.status())));
+    }
+    Ok(())
+}
+
+fn local_name(bytes: &[u8]) -> String {
+    // `local_name()` already strips any namespace prefix (e.g. "d:href" -> "href"),
+    // which is what lets this work across servers using different prefixes.
+    String::from_utf8_lossy(bytes).to_string()
+}
+
+struct RawResponse {
+    href: String,
+    etag: Option<String>,
+    calendar_data: Option<String>,
+}
+
+fn apply_field(cur: &mut RawResponse, field: &str, text: &str) {
+    match field {
+        "href" => cur.href.push_str(text),
+        "getetag" => cur.etag = Some(cur.etag.take().unwrap_or_default() + text),
+        "calendar-data" => cur.calendar_data = Some(cur.calendar_data.take().unwrap_or_default() + text),
+        _ => {}
+    }
+}
+
+/// Parses a CalDAV/WebDAV multistatus (207) XML response into one entry per
+/// `<d:response>`. Namespace-prefix-agnostic (matches by local element name only),
+/// since different servers use different prefixes for the same DAV/CalDAV elements.
+fn parse_multistatus(xml: &str) -> Vec<RawResponse> {
+    let mut reader = Reader::from_str(xml);
+    let mut buf = Vec::new();
+    let mut out = Vec::new();
+    let mut current: Option<RawResponse> = None;
+    let mut field: Option<String> = None;
+
+    loop {
+        let event = match reader.read_event_into(&mut buf) {
+            Ok(XmlEvent::Eof) => break,
+            Ok(e) => e,
+            Err(_) => break,
+        };
+        match event {
+            XmlEvent::Start(e) => {
+                let name = local_name(e.local_name().as_ref());
+                match name.as_str() {
+                    "response" => current = Some(RawResponse { href: String::new(), etag: None, calendar_data: None }),
+                    "href" | "getetag" | "calendar-data" => field = Some(name),
+                    _ => {}
+                }
+            }
+            XmlEvent::Text(t) => {
+                if let (Some(cur), Some(f)) = (current.as_mut(), field.as_deref()) {
+                    let text = t.decode().map(|c| c.into_owned()).unwrap_or_default();
+                    apply_field(cur, f, &text);
+                }
+            }
+            XmlEvent::CData(t) => {
+                if let (Some(cur), Some(f)) = (current.as_mut(), field.as_deref()) {
+                    let text = String::from_utf8_lossy(t.as_ref()).to_string();
+                    apply_field(cur, f, &text);
+                }
+            }
+            XmlEvent::End(e) => {
+                let name = local_name(e.local_name().as_ref());
+                match name.as_str() {
+                    "href" | "getetag" | "calendar-data" => field = None,
+                    "response" => {
+                        if let Some(c) = current.take() {
+                            out.push(c);
+                        }
+                    }
+                    _ => {}
+                }
+            }
+            _ => {}
+        }
+        buf.clear();
+    }
+    out
+}
+
+fn resolve_href(base_url: &str, href: &str) -> String {
+    if href.starts_with("http://") || href.starts_with("https://") {
+        return href.to_string();
+    }
+    reqwest::Url::parse(base_url)
+        .ok()
+        .and_then(|base| base.join(href).ok())
+        .map(|u| u.to_string())
+        .unwrap_or_else(|| href.to_string())
+}
+
+/// Fetches every VEVENT resource in the calendar collection via a single REPORT
+/// request. Each `Event` returned has its href/etag as separate return fields
+/// (the caller decides how to persist them — this app reuses the `google_event_id`
+/// column to store the href, mirroring how Google Calendar sync already stores its
+/// own external id there).
+pub fn list_events(creds: &CaldavCreds) -> AppResult<Vec<(String, Event)>> {
+    let body = r#"<?xml version="1.0" encoding="utf-8" ?>
+<c:calendar-query xmlns:d="DAV:" xmlns:c="urn:ietf:params:xml:ns:caldav">
+  <d:prop>
+    <d:getetag/>
+    <c:calendar-data/>
+  </d:prop>
+  <c:filter>
+    <c:comp-filter name="VCALENDAR">
+      <c:comp-filter name="VEVENT"/>
+    </c:comp-filter>
+  </c:filter>
+</c:calendar-query>"#;
+
+    let resp = client()
+        .request(reqwest::Method::from_bytes(b"REPORT").unwrap(), &creds.url)
+        .basic_auth(&creds.username, Some(&creds.password))
+        .header("Content-Type", "application/xml; charset=utf-8")
+        .header("Depth", "1")
+        .body(body)
+        .send()
+        .map_err(|e| AppError::Other(e.to_string()))?;
+
+    let status = resp.status();
+    if status.as_u16() != 207 && !status.is_success() {
+        let text = resp.text().unwrap_or_default();
+        return Err(AppError::Other(format!(
+            "CalDAV-Abfrage fehlgeschlagen (HTTP {status}). Prüfe Kalender-URL/Zugangsdaten. Server-Antwort: {text}"
+        )));
+    }
+    let text = resp.text().map_err(|e| AppError::Other(e.to_string()))?;
+    let responses = parse_multistatus(&text);
+
+    let mut out = Vec::new();
+    for r in responses {
+        let Some(data) = r.calendar_data else { continue };
+        if let Some(event) = ics::parse(&data).into_iter().next() {
+            out.push((r.href, event));
+        }
+    }
+    Ok(out)
+}
+
+/// Creates a new resource on the server for `event` and returns its href.
+pub fn create_event(creds: &CaldavCreds, event: &Event) -> AppResult<String> {
+    let filename = format!("{}.ics", event.id);
+    let url = format!("{}/{}", creds.url.trim_end_matches('/'), filename);
+    let ics_body = ics::export(std::slice::from_ref(event));
+    let resp = client()
+        .put(&url)
+        .basic_auth(&creds.username, Some(&creds.password))
+        .header("Content-Type", "text/calendar; charset=utf-8")
+        .body(ics_body)
+        .send()
+        .map_err(|e| AppError::Other(e.to_string()))?;
+    check_status(&resp, "Erstellen")?;
+    Ok(filename)
+}
+
+/// Overwrites the resource at `href` with `event`'s current data.
+pub fn update_event(creds: &CaldavCreds, href: &str, event: &Event) -> AppResult<()> {
+    let url = resolve_href(&creds.url, href);
+    let ics_body = ics::export(std::slice::from_ref(event));
+    let resp = client()
+        .put(&url)
+        .basic_auth(&creds.username, Some(&creds.password))
+        .header("Content-Type", "text/calendar; charset=utf-8")
+        .body(ics_body)
+        .send()
+        .map_err(|e| AppError::Other(e.to_string()))?;
+    check_status(&resp, "Aktualisieren")
+}
+
+pub fn delete_event(creds: &CaldavCreds, href: &str) -> AppResult<()> {
+    let url = resolve_href(&creds.url, href);
+    let resp = client()
+        .delete(&url)
+        .basic_auth(&creds.username, Some(&creds.password))
+        .send()
+        .map_err(|e| AppError::Other(e.to_string()))?;
+    if resp.status().as_u16() == 404 {
+        return Ok(());
+    }
+    check_status(&resp, "Löschen")
+}
diff --git a/src-tauri/src/commands.rs b/src-tauri/src/commands.rs
new file mode 100644
index 0000000..4c2c539
--- /dev/null
+++ b/src-tauri/src/commands.rs
@@ -0,0 +1,1851 @@
+use crate::accounts;
+use crate::db::Db;
+use crate::error::{AppError, AppResult};
+use crate::models::{
+    Account, AuthMethod, ComposeMessage, Contact, ContactGroup, DraftPayload, Event, Folder, MessageFull,
+    MessageSummary, NewAccount, NewContact, NewContactGroup, NewEvent, NewRule, NewTask, Protocol, Rule, Task,
+    TaskPriority,
+};
+use crate::{ics, imap_client, mailutil, mbox, pop3_client, smtp_client, vcard};
+use mailparse::{parse_mail, MailHeaderMap};
+use tauri::{Emitter, Manager, State};
+
+pub(crate) fn find_account(db: &Db, account_id: &str) -> AppResult<Account> {
+    db.list_accounts()?
+        .into_iter()
+        .find(|a| a.id == account_id)
+        .ok_or_else(|| AppError::NotFound(format!("account {account_id} not found")))
+}
+
+fn caldav_creds(db: &Db, caldav_account_id: &str) -> AppResult<crate::caldav::CaldavCreds> {
+    let account = db.get_caldav_account(caldav_account_id)?;
+    let password = accounts::get_password(&account.id)?;
+    Ok(crate::caldav::CaldavCreds { url: account.url, username: account.username, password })
+}
+
+#[tauri::command]
+pub async fn add_account(app: tauri::AppHandle, db: State<'_, Db>, new_account: NewAccount) -> AppResult<Account> {
+    let created = accounts::create_account(&db, new_account)?;
+    if created.protocol == Protocol::Imap {
+        crate::idle::spawn_watcher(app, created.id.clone());
+    }
+    Ok(created)
+}
+
+#[tauri::command]
+pub async fn list_accounts(db: State<'_, Db>) -> AppResult<Vec<Account>> {
+    db.list_accounts()
+}
+
+#[tauri::command]
+pub async fn delete_account(db: State<'_, Db>, account_id: String) -> AppResult<()> {
+    accounts::remove_account(&db, &account_id)
+}
+
+#[tauri::command]
+pub async fn update_account(
+    db: State<'_, Db>,
+    account: Account,
+    new_password: Option<String>,
+) -> AppResult<()> {
+    db.save_account(&account)?;
+    if let Some(pw) = new_password {
+        if !pw.is_empty() {
+            accounts::store_password(&account.id, &pw)?;
+        }
+    }
+    Ok(())
+}
+
+fn is_protected_local_folder(name: &str) -> bool {
+    name == Db::DRAFTS_FOLDER || name == Db::LOCAL_FOLDER
+}
+
+#[tauri::command]
+pub async fn create_folder(db: State<'_, Db>, account_id: String, name: String) -> AppResult<()> {
+    let account = find_account(&db, &account_id)?;
+    if account.protocol == Protocol::Local {
+        return db.create_local_folder(&name);
+    }
+    tauri::async_runtime::spawn_blocking(move || -> AppResult<()> {
+        let mut session = imap_client::open_session(&account)?;
+        imap_client::create_folder(&mut session, &name)?;
+        let _ = session.logout();
+        Ok(())
+    })
+    .await
+    .map_err(|e| AppError::Other(e.to_string()))?
+}
+
+#[tauri::command]
+pub async fn rename_folder(db: State<'_, Db>, account_id: String, from: String, to: String) -> AppResult<()> {
+    let account = find_account(&db, &account_id)?;
+    if account.protocol == Protocol::Local {
+        if is_protected_local_folder(&from) {
+            return Err(AppError::Other("Dieser Ordner kann nicht umbenannt werden".into()));
+        }
+        return db.rename_local_folder(&from, &to);
+    }
+    tauri::async_runtime::spawn_blocking(move || -> AppResult<()> {
+        let mut session = imap_client::open_session(&account)?;
+        imap_client::rename_folder(&mut session, &from, &to)?;
+        let _ = session.logout();
+        Ok(())
+    })
+    .await
+    .map_err(|e| AppError::Other(e.to_string()))?
+}
+
+#[tauri::command]
+pub async fn delete_folder(db: State<'_, Db>, account_id: String, name: String) -> AppResult<()> {
+    let account = find_account(&db, &account_id)?;
+    if account.protocol == Protocol::Local {
+        if is_protected_local_folder(&name) {
+            return Err(AppError::Other("Dieser Ordner kann nicht gelöscht werden".into()));
+        }
+        return db.delete_local_folder(&name);
+    }
+    tauri::async_runtime::spawn_blocking(move || -> AppResult<()> {
+        let mut session = imap_client::open_session(&account)?;
+        imap_client::delete_folder(&mut session, &name)?;
+        let _ = session.logout();
+        Ok(())
+    })
+    .await
+    .map_err(|e| AppError::Other(e.to_string()))?
+}
+
+#[tauri::command]
+pub async fn mark_folder_read(db: State<'_, Db>, account_id: String, folder: String) -> AppResult<usize> {
+    let account = find_account(&db, &account_id)?;
+    let unread: Vec<u32> = db
+        .list_messages(&account_id, &folder)?
+        .into_iter()
+        .filter(|m| !m.is_read)
+        .map(|m| m.uid)
+        .collect();
+    if account.protocol == Protocol::Imap && !unread.is_empty() {
+        let folder_c = folder.clone();
+        let uids = unread.clone();
+        tauri::async_runtime::spawn_blocking(move || -> AppResult<()> {
+            let mut session = imap_client::open_session(&account)?;
+            for uid in uids {
+                let _ = imap_client::set_flag(&mut session, &folder_c, uid, "\\Seen", true);
+            }
+            let _ = session.logout();
+            Ok(())
+        })
+        .await
+        .map_err(|e| AppError::Other(e.to_string()))??;
+    }
+    for uid in &unread {
+        db.set_read(&account_id, &folder, *uid, true)?;
+    }
+    Ok(unread.len())
+}
+
+fn condition_matches(cond: &crate::models::RuleCondition, m: &MessageSummary) -> bool {
+    let needle = cond.contains.to_lowercase();
+    if needle.is_empty() {
+        return false;
+    }
+    match cond.field.as_str() {
+        "subject" => m.subject.to_lowercase().contains(&needle),
+        _ => m.from_addr.to_lowercase().contains(&needle) || m.from_name.to_lowercase().contains(&needle),
+    }
+}
+
+fn rule_matches(rule: &Rule, m: &MessageSummary) -> bool {
+    if rule.conditions.is_empty() {
+        return false;
+    }
+    match rule.match_type {
+        crate::models::MatchType::All => rule.conditions.iter().all(|c| condition_matches(c, m)),
+        crate::models::MatchType::Any => rule.conditions.iter().any(|c| condition_matches(c, m)),
+    }
+}
+
+#[tauri::command]
+pub async fn apply_rules_to_folder(db: State<'_, Db>, account_id: String, folder: String) -> AppResult<usize> {
+    let account = find_account(&db, &account_id)?;
+    if account.protocol != Protocol::Imap && account.protocol != Protocol::Pop3 {
+        return Ok(0);
+    }
+    let messages = db.list_messages(&account_id, &folder)?;
+    let rules = db.list_rules_for_account(&account_id)?;
+    if rules.is_empty() {
+        return Ok(0);
+    }
+
+    let mut actions: Vec<(u32, crate::models::RuleAction, Option<String>)> = Vec::new();
+    for m in &messages {
+        for rule in &rules {
+            if account.protocol == Protocol::Pop3 && rule.action == crate::models::RuleAction::MoveTo {
+                continue;
+            }
+            if rule_matches(rule, m) {
+                actions.push((m.uid, rule.action, rule.action_value.clone()));
+                break;
+            }
+        }
+    }
+    if actions.is_empty() {
+        return Ok(0);
+    }
+
+    let account_c = account.clone();
+    let folder_c = folder.clone();
+    let applied: std::collections::HashMap<u32, crate::models::RuleAction> = match account.protocol {
+        Protocol::Imap => tauri::async_runtime::spawn_blocking(move || -> std::collections::HashMap<u32, crate::models::RuleAction> {
+            use crate::models::RuleAction;
+            let mut applied = std::collections::HashMap::new();
+            let Ok(mut session) = imap_client::open_session(&account_c) else {
+                return applied;
+            };
+            for (uid, action, value) in actions {
+                let ok = match action {
+                    RuleAction::MoveTo => value
+                        .map(|target| imap_client::move_message(&mut session, &folder_c, uid, &target).is_ok())
+                        .unwrap_or(false),
+                    RuleAction::Delete => imap_client::delete_message(&mut session, &folder_c, uid).is_ok(),
+                    RuleAction::MarkRead => imap_client::set_flag(&mut session, &folder_c, uid, "\\Seen", true).is_ok(),
+                    RuleAction::Flag => imap_client::set_flag(&mut session, &folder_c, uid, "\\Flagged", true).is_ok(),
+                };
+                if ok {
+                    applied.insert(uid, action);
+                }
+            }
+            let _ = session.logout();
+            applied
+        })
+        .await
+        .unwrap_or_default(),
+        Protocol::Pop3 => {
+            let password = accounts::get_password(&account_c.id).ok();
+            tauri::async_runtime::spawn_blocking(move || -> std::collections::HashMap<u32, crate::models::RuleAction> {
+                use crate::models::RuleAction;
+                let mut applied = std::collections::HashMap::new();
+                let Some(password) = password else { return applied };
+                let Ok(mut session) =
+                    pop3_client::connect(&account_c.incoming_host, account_c.incoming_port, &account_c.username, &password)
+                else {
+                    return applied;
+                };
+                for (uid, action, _value) in actions {
+                    let ok = match action {
+                        RuleAction::Delete => session.delete(uid).is_ok(),
+                        RuleAction::MarkRead | RuleAction::Flag => true,
+                        RuleAction::MoveTo => false,
+                    };
+                    if ok {
+                        applied.insert(uid, action);
+                    }
+                }
+                session.quit();
+                applied
+            })
+            .await
+            .unwrap_or_default()
+        }
+        Protocol::Local => unreachable!(),
+    };
+
+    for (uid, action) in &applied {
+        use crate::models::RuleAction;
+        match action {
+            RuleAction::MoveTo | RuleAction::Delete => db.delete_message(&account_id, &folder, *uid)?,
+            RuleAction::MarkRead => db.set_read(&account_id, &folder, *uid, true)?,
+            RuleAction::Flag => db.set_flagged(&account_id, &folder, *uid, true)?,
+        }
+    }
+    Ok(applied.len())
+}
+
+#[tauri::command]
+pub async fn list_folders(db: State<'_, Db>, account_id: String) -> AppResult<Vec<Folder>> {
+    let account = find_account(&db, &account_id)?;
+    if account.protocol == Protocol::Pop3 {
+        return Ok(vec![Folder {
+            name: "INBOX".into(),
+            display_name: "Posteingang".into(),
+            unread: 0,
+        }]);
+    }
+    if account.protocol == Protocol::Local {
+        let mut folders = vec![
+            Folder {
+                name: Db::DRAFTS_FOLDER.into(),
+                display_name: Db::DRAFTS_FOLDER.into(),
+                unread: 0,
+            },
+            Folder {
+                name: Db::LOCAL_FOLDER.into(),
+                display_name: Db::LOCAL_FOLDER.into(),
+                unread: 0,
+            },
+        ];
+        for name in db.list_local_folders()? {
+            let unread = db
+                .list_messages(&account_id, &name)?
+                .into_iter()
+                .filter(|m| !m.is_read)
+                .count() as u32;
+            folders.push(Folder { name: name.clone(), display_name: name, unread });
+        }
+        return Ok(folders);
+    }
+    tauri::async_runtime::spawn_blocking(move || {
+        let mut session = imap_client::open_session(&account)?;
+        let folders = imap_client::list_folders(&mut session);
+        let _ = session.logout();
+        folders
+    })
+    .await
+    .map_err(|e| AppError::Other(e.to_string()))?
+}
+
+#[tauri::command]
+pub async fn sync_messages(
+    db: State<'_, Db>,
+    account_id: String,
+    folder: String,
+) -> AppResult<Vec<MessageSummary>> {
+    let account = find_account(&db, &account_id)?;
+    if account.protocol == Protocol::Local {
+        return db.list_visible_messages(&account_id, &folder);
+    }
+    let acc_id_for_fetch = account_id.clone();
+    let folder_for_fetch = folder.clone();
+    let account_for_fetch = account.clone();
+
+    let messages = tauri::async_runtime::spawn_blocking(move || -> AppResult<Vec<MessageSummary>> {
+        match account_for_fetch.protocol {
+            Protocol::Imap => {
+                let mut session = imap_client::open_session(&account_for_fetch)?;
+                let msgs = imap_client::fetch_messages(&mut session, &acc_id_for_fetch, &folder_for_fetch);
+                let _ = session.logout();
+                msgs
+            }
+            Protocol::Pop3 => {
+                let password = accounts::get_password(&account_for_fetch.id)?;
+                let mut session = pop3_client::connect(
+                    &account_for_fetch.incoming_host,
+                    account_for_fetch.incoming_port,
+                    &account_for_fetch.username,
+                    &password,
+                )?;
+                let msgs = session.list_messages(&acc_id_for_fetch);
+                session.quit();
+                msgs
+            }
+            Protocol::Local => Ok(vec![]),
+        }
+    })
+    .await
+    .map_err(|e| AppError::Other(e.to_string()))??;
+
+    let messages = apply_rules(&db, &account, &folder, messages).await?;
+
+    if folder == "INBOX" {
+        if let Err(e) = apply_vacation_autoreply(&db, &account, &messages).await {
+            eprintln!("Abwesenheitsnotiz fehlgeschlagen: {e}");
+        }
+    }
+
+    db.upsert_messages(&messages)?;
+    for m in &messages {
+        let _ = db.touch_contact(&m.from_name, &m.from_addr);
+    }
+    db.list_visible_messages(&account_id, &folder)
+}
+
+/// Applies enabled rules to newly-fetched IMAP messages: matching messages get moved,
+/// deleted, marked read or flagged on the server. Returns the message list with
+/// moved/deleted entries removed and mark-read/flag reflected locally.
+async fn apply_rules(
+    db: &Db,
+    account: &Account,
+    folder: &str,
+    fetched: Vec<MessageSummary>,
+) -> AppResult<Vec<MessageSummary>> {
+    if account.protocol != Protocol::Imap && account.protocol != Protocol::Pop3 {
+        return Ok(fetched);
+    }
+    let existing_uids: std::collections::HashSet<u32> =
+        db.list_messages(&account.id, folder)?.into_iter().map(|m| m.uid).collect();
+    let rules = db.list_rules_for_account(&account.id)?;
+    if rules.is_empty() {
+        return Ok(fetched);
+    }
+
+    let mut actions: Vec<(u32, crate::models::RuleAction, Option<String>)> = Vec::new();
+    for m in fetched.iter().filter(|m| !existing_uids.contains(&m.uid)) {
+        for rule in &rules {
+            // POP3 has no server-side folders, so a "move to" rule simply can't apply
+            // there — skip it and keep checking the account's other rules instead of
+            // treating it as a (non-)match.
+            if account.protocol == Protocol::Pop3 && rule.action == crate::models::RuleAction::MoveTo {
+                continue;
+            }
+            if rule_matches(rule, m) {
+                actions.push((m.uid, rule.action, rule.action_value.clone()));
+                break;
+            }
+        }
+    }
+    if actions.is_empty() {
+        return Ok(fetched);
+    }
+
+    let account_c = account.clone();
+    let folder_c = folder.to_string();
+    let applied: std::collections::HashMap<u32, crate::models::RuleAction> = match account.protocol {
+        Protocol::Imap => tauri::async_runtime::spawn_blocking(move || -> std::collections::HashMap<u32, crate::models::RuleAction> {
+            use crate::models::RuleAction;
+            let mut applied = std::collections::HashMap::new();
+            let Ok(mut session) = imap_client::open_session(&account_c) else {
+                return applied;
+            };
+            for (uid, action, value) in actions {
+                let ok = match action {
+                    RuleAction::MoveTo => value
+                        .map(|target| imap_client::move_message(&mut session, &folder_c, uid, &target).is_ok())
+                        .unwrap_or(false),
+                    RuleAction::Delete => imap_client::delete_message(&mut session, &folder_c, uid).is_ok(),
+                    RuleAction::MarkRead => imap_client::set_flag(&mut session, &folder_c, uid, "\\Seen", true).is_ok(),
+                    RuleAction::Flag => imap_client::set_flag(&mut session, &folder_c, uid, "\\Flagged", true).is_ok(),
+                };
+                if ok {
+                    applied.insert(uid, action);
+                }
+            }
+            let _ = session.logout();
+            applied
+        })
+        .await
+        .unwrap_or_default(),
+        // POP3: "delete" is a real server call (DELE); "mark read"/"flag" have no
+        // server-side concept for POP3 at all, so they're local-only — just record
+        // them as applied and let the shared post-processing below reflect that in
+        // the returned MessageSummary before it's cached.
+        Protocol::Pop3 => {
+            let password = accounts::get_password(&account_c.id).ok();
+            tauri::async_runtime::spawn_blocking(move || -> std::collections::HashMap<u32, crate::models::RuleAction> {
+                use crate::models::RuleAction;
+                let mut applied = std::collections::HashMap::new();
+                let Some(password) = password else { return applied };
+                let Ok(mut session) =
+                    pop3_client::connect(&account_c.incoming_host, account_c.incoming_port, &account_c.username, &password)
+                else {
+                    return applied;
+                };
+                for (uid, action, _value) in actions {
+                    let ok = match action {
+                        RuleAction::Delete => session.delete(uid).is_ok(),
+                        RuleAction::MarkRead | RuleAction::Flag => true,
+                        RuleAction::MoveTo => false,
+                    };
+                    if ok {
+                        applied.insert(uid, action);
+                    }
+                }
+                session.quit();
+                applied
+            })
+            .await
+            .unwrap_or_default()
+        }
+        Protocol::Local => unreachable!(),
+    };
+
+    Ok(fetched
+        .into_iter()
+        .filter_map(|mut m| match applied.get(&m.uid) {
+            Some(crate::models::RuleAction::MoveTo) | Some(crate::models::RuleAction::Delete) => None,
+            Some(crate::models::RuleAction::MarkRead) => {
+                m.is_read = true;
+                Some(m)
+            }
+            Some(crate::models::RuleAction::Flag) => {
+                m.flagged = true;
+                Some(m)
+            }
+            None => Some(m),
+        })
+        .collect())
+}
+
+/// Heuristic guard against auto-reply loops and replying to bulk senders: this
+/// codebase's message model doesn't carry raw headers (no Auto-Submitted/
+/// Precedence/List-Unsubscribe), so this is pattern-based rather than a proper
+/// RFC 3834 check. Catches the common cases (no-reply addresses, and replying to
+/// what looks like another auto-responder) without needing header plumbing.
+fn looks_automated(sender: &str, subject: &str) -> bool {
+    const SENDER_MARKERS: &[&str] = &["noreply", "no-reply", "donotreply", "do-not-reply", "mailer-daemon", "postmaster"];
+    if SENDER_MARKERS.iter().any(|m| sender.contains(m)) {
+        return true;
+    }
+    let subj = subject.to_lowercase();
+    const SUBJECT_MARKERS: &[&str] = &[
+        "auto:",
+        "automatic reply",
+        "automatische antwort",
+        "out of office",
+        "abwesenheit",
+        "away from",
+    ];
+    SUBJECT_MARKERS.iter().any(|m| subj.contains(m))
+}
+
+/// Sends a vacation auto-reply for newly-fetched INBOX messages, if the account has
+/// one enabled and we're inside its date range. Replies at most once per sender per
+/// vacation period (tracked via `vacation_replied`, keyed by the period's start_ts).
+async fn apply_vacation_autoreply(db: &Db, account: &Account, fetched: &[MessageSummary]) -> AppResult<()> {
+    if account.protocol != Protocol::Imap {
+        return Ok(());
+    }
+    let Some(settings) = db.get_vacation_settings(&account.id)? else {
+        return Ok(());
+    };
+    if !settings.enabled {
+        return Ok(());
+    }
+    let now = chrono::Utc::now().timestamp();
+    if let Some(start) = settings.start_ts {
+        if now < start {
+            return Ok(());
+        }
+    }
+    if let Some(end) = settings.end_ts {
+        if now > end {
+            return Ok(());
+        }
+    }
+    let vacation_key = settings.start_ts.unwrap_or(0);
+
+    let existing_uids: std::collections::HashSet<u32> =
+        db.list_messages(&account.id, "INBOX")?.into_iter().map(|m| m.uid).collect();
+    let account_email = account.email.to_lowercase();
+
+    for m in fetched.iter().filter(|m| !existing_uids.contains(&m.uid)) {
+        let sender = m.from_addr.trim().to_lowercase();
+        if sender.is_empty() || sender == account_email {
+            continue;
+        }
+        if looks_automated(&sender, &m.subject) {
+            continue;
+        }
+        if db.has_vacation_replied(&account.id, &sender, vacation_key).unwrap_or(false) {
+            continue;
+        }
+
+        let message = ComposeMessage {
+            account_id: account.id.clone(),
+            to: m.from_addr.clone(),
+            cc: None,
+            bcc: None,
+            subject: if settings.subject.trim().is_empty() {
+                format!("Automatische Antwort: {}", m.subject)
+            } else {
+                settings.subject.clone()
+            },
+            body_html: settings.body.replace('\n', "<br>"),
+            attachments: vec![],
+            in_reply_to: if m.message_id.is_empty() { None } else { Some(m.message_id.clone()) },
+            reply_to: None,
+            request_read_receipt: false,
+            importance: None,
+        };
+        if smtp_client::send(account, message).await.is_ok() {
+            let _ = db.mark_vacation_replied(&account.id, &sender, vacation_key);
+        }
+    }
+    Ok(())
+}
+
+#[tauri::command]
+pub async fn get_vacation_settings(db: State<'_, Db>, account_id: String) -> AppResult<crate::models::VacationSettings> {
+    Ok(db.get_vacation_settings(&account_id)?.unwrap_or(crate::models::VacationSettings {
+        account_id,
+        enabled: false,
+        start_ts: None,
+        end_ts: None,
+        subject: String::new(),
+        body: String::new(),
+    }))
+}
+
+#[tauri::command]
+pub async fn save_vacation_settings(
+    db: State<'_, Db>,
+    account_id: String,
+    settings: crate::models::NewVacationSettings,
+) -> AppResult<()> {
+    db.save_vacation_settings(&account_id, &settings)
+}
+
+#[tauri::command]
+pub async fn list_cached_messages(
+    db: State<'_, Db>,
+    account_id: String,
+    folder: String,
+) -> AppResult<Vec<MessageSummary>> {
+    db.list_visible_messages(&account_id, &folder)
+}
+
+#[tauri::command]
+pub async fn get_message(
+    db: State<'_, Db>,
+    account_id: String,
+    folder: String,
+    uid: u32,
+) -> AppResult<MessageFull> {
+    let account = find_account(&db, &account_id)?;
+
+    if account.protocol == Protocol::Local {
+        let raw = db.get_local_body(&folder, uid)?;
+        let full = mailutil::parse_message_full(&account_id, &folder, uid, &raw)?;
+        db.set_read(&account_id, &folder, uid, true)?;
+        return Ok(full);
+    }
+
+    let result = tauri::async_runtime::spawn_blocking(move || -> AppResult<MessageFull> {
+        match account.protocol {
+            Protocol::Imap => {
+                let mut session = imap_client::open_session(&account)?;
+                let full = imap_client::fetch_full_message(&mut session, &account_id, &folder, uid);
+                if full.is_ok() {
+                    let _ = imap_client::set_flag(&mut session, &folder, uid, "\\Seen", true);
+                }
+                let _ = session.logout();
+                full
+            }
+            Protocol::Pop3 => {
+                let password = accounts::get_password(&account.id)?;
+                let mut session = pop3_client::connect(
+                    &account.incoming_host,
+                    account.incoming_port,
+                    &account.username,
+                    &password,
+                )?;
+                let full = session.fetch_full(&account_id, uid);
+                session.quit();
+                full
+            }
+            Protocol::Local => unreachable!(),
+        }
+    })
+    .await
+    .map_err(|e| AppError::Other(e.to_string()))??;
+
+    db.set_read(&result.account_id, &result.folder, uid, true)?;
+    Ok(result)
+}
+
+fn parse_recipients(raw: &str) -> Vec<(String, String)> {
+    raw.split(',')
+        .map(str::trim)
+        .filter(|s| !s.is_empty())
+        .map(|s| {
+            if let Some(idx) = s.rfind('<') {
+                let name = s[..idx].trim().trim_matches('"').to_string();
+                let addr = s[idx + 1..].trim_end_matches('>').trim().to_string();
+                if name.is_empty() { (addr.clone(), addr) } else { (name, addr) }
+            } else {
+                (s.to_string(), s.to_string())
+            }
+        })
+        .collect()
+}
+
+#[tauri::command]
+pub async fn send_message(db: State<'_, Db>, message: ComposeMessage) -> AppResult<()> {
+    let account = find_account(&db, &message.account_id)?;
+    for field in [Some(&message.to), message.cc.as_ref(), message.bcc.as_ref()].into_iter().flatten() {
+        for (name, email) in parse_recipients(field) {
+            let _ = db.touch_contact(&name, &email);
+        }
+    }
+    smtp_client::send(&account, message).await
+}
+
+/// Tracks in-flight scheduled sends so they can be cancelled (Undo Send).
+/// Only holds for the lifetime of the running app — a scheduled send that
+/// hasn't fired yet is lost if the app is closed before it does.
+pub struct PendingSends(pub std::sync::Mutex<std::collections::HashMap<String, tokio::sync::oneshot::Sender<()>>>);
+
+impl PendingSends {
+    pub fn new() -> Self {
+        PendingSends(std::sync::Mutex::new(std::collections::HashMap::new()))
+    }
+}
+
+/// Schedules a send for `send_at_ts` and returns an id that can be passed to
+/// `cancel_scheduled_send` any time before it fires. Emits
+/// `scheduled-send-completed` with `{id, accountId, cancelled}` once the
+/// timer resolves (sent) or is cancelled, so the frontend can finalize UI
+/// state (clear drafts, show a toast) regardless of which window initiated
+/// the send — the popup compose window may already be closed by then.
+/// Spawns the actual timer + send for a scheduled message, and cleans up both the
+/// in-memory `PendingSends` registry and the persisted `scheduled_sends` row once it
+/// resolves (sent or cancelled). Shared between fresh scheduling (`send_message_at`)
+/// and re-arming still-pending sends on app startup (`rehydrate_scheduled_sends`).
+pub(crate) fn spawn_send_timer(app: tauri::AppHandle, id: String, account: Account, message: ComposeMessage, send_at_ts: i64) {
+    let delay = (send_at_ts - chrono::Utc::now().timestamp()).max(0) as u64;
+    let (tx, rx) = tokio::sync::oneshot::channel();
+    app.state::<PendingSends>().0.lock().unwrap().insert(id.clone(), tx);
+
+    let id_c = id.clone();
+    let account_id = message.account_id.clone();
+    let app_c = app.clone();
+    tauri::async_runtime::spawn(async move {
+        let cancelled = tokio::select! {
+            _ = tokio::time::sleep(std::time::Duration::from_secs(delay)) => false,
+            _ = rx => true,
+        };
+        if !cancelled {
+            let _ = smtp_client::send(&account, message).await;
+        }
+        app_c.state::<PendingSends>().0.lock().unwrap().remove(&id_c);
+        let _ = app_c.state::<Db>().delete_scheduled_send(&id_c);
+        let _ = app_c.emit(
+            "scheduled-send-completed",
+            serde_json::json!({ "id": id_c, "accountId": account_id, "cancelled": cancelled }),
+        );
+    });
+}
+
+/// Re-arms every still-pending scheduled send after an app restart — the in-memory
+/// timers from a previous run don't survive, but the `scheduled_sends` DB rows do.
+/// Called once from `lib.rs`'s setup hook. Anything whose account got deleted, or
+/// whose stored JSON no longer parses, is dropped (and its row removed) rather than
+/// panicking the whole startup sequence over one bad entry.
+pub fn rehydrate_scheduled_sends(app: &tauri::AppHandle) {
+    let db = app.state::<Db>();
+    let Ok(rows) = db.list_scheduled_sends() else { return };
+    for (id, message_json, send_at_ts) in rows {
+        let message: Option<ComposeMessage> = serde_json::from_str(&message_json).ok();
+        let account = message.as_ref().and_then(|m| find_account(&db, &m.account_id).ok());
+        match (account, message) {
+            (Some(account), Some(message)) => {
+                spawn_send_timer(app.clone(), id, account, message, send_at_ts);
+            }
+            _ => {
+                let _ = db.delete_scheduled_send(&id);
+            }
+        }
+    }
+}
+
+#[tauri::command]
+pub async fn send_message_at(app: tauri::AppHandle, db: State<'_, Db>, message: ComposeMessage, send_at_ts: i64) -> AppResult<String> {
+    let account = find_account(&db, &message.account_id)?;
+    for field in [Some(&message.to), message.cc.as_ref(), message.bcc.as_ref()].into_iter().flatten() {
+        for (name, email) in parse_recipients(field) {
+            let _ = db.touch_contact(&name, &email);
+        }
+    }
+    let id = uuid::Uuid::new_v4().to_string();
+    let message_json = serde_json::to_string(&message).map_err(|e| AppError::Other(e.to_string()))?;
+    db.save_scheduled_send(&id, &message.account_id, &message_json, send_at_ts)?;
+    spawn_send_timer(app, id.clone(), account, message, send_at_ts);
+    Ok(id)
+}
+
+#[tauri::command]
+pub async fn cancel_scheduled_send(app: tauri::AppHandle, id: String) -> AppResult<bool> {
+    let sender = app.state::<PendingSends>().0.lock().unwrap().remove(&id);
+    match sender {
+        Some(tx) => {
+            let _ = tx.send(());
+            Ok(true)
+        }
+        None => Ok(false),
+    }
+}
+
+#[tauri::command]
+pub async fn list_contacts(db: State<'_, Db>) -> AppResult<Vec<Contact>> {
+    db.list_contacts()
+}
+
+#[tauri::command]
+pub async fn search_contacts(db: State<'_, Db>, query: String) -> AppResult<Vec<Contact>> {
+    db.search_contacts(&query, 8)
+}
+
+#[tauri::command]
+pub async fn add_contact(db: State<'_, Db>, new_contact: NewContact) -> AppResult<Contact> {
+    db.create_contact(new_contact)
+}
+
+#[tauri::command]
+pub async fn update_contact(db: State<'_, Db>, contact: Contact) -> AppResult<()> {
+    db.update_contact(&contact)
+}
+
+#[tauri::command]
+pub async fn delete_contact(db: State<'_, Db>, contact_id: String) -> AppResult<()> {
+    if let Ok(contact) = db.get_contact(&contact_id) {
+        if let (Some(account_id), Some(resource_name)) = (&contact.google_account_id, &contact.google_resource_name)
+        {
+            if let Ok(account) = find_account(&db, account_id) {
+                if account.auth_method == AuthMethod::GoogleOauth {
+                    let _ = push_contact_delete_to_google(&account, resource_name).await;
+                }
+            }
+        }
+    }
+    db.delete_contact(&contact_id)
+}
+
+#[tauri::command]
+pub async fn toggle_contact_favorite(db: State<'_, Db>, contact_id: String, favorite: bool) -> AppResult<()> {
+    db.set_contact_favorite(&contact_id, favorite)
+}
+
+#[tauri::command]
+pub async fn mark_read(
+    db: State<'_, Db>,
+    account_id: String,
+    folder: String,
+    uid: u32,
+    is_read: bool,
+) -> AppResult<()> {
+    let account = find_account(&db, &account_id)?;
+    if account.protocol == Protocol::Imap {
+        let folder_c = folder.clone();
+        tauri::async_runtime::spawn_blocking(move || -> AppResult<()> {
+            let mut session = imap_client::open_session(&account)?;
+            imap_client::set_flag(&mut session, &folder_c, uid, "\\Seen", is_read)?;
+            let _ = session.logout();
+            Ok(())
+        })
+        .await
+        .map_err(|e| AppError::Other(e.to_string()))??;
+    }
+    db.set_read(&account_id, &folder, uid, is_read)
+}
+
+#[tauri::command]
+pub async fn search_messages(
+    db: State<'_, Db>,
+    account_id: String,
+    query: String,
+) -> AppResult<Vec<MessageSummary>> {
+    db.search_messages(&account_id, &query)
+}
+
+#[tauri::command]
+pub async fn search_all_messages(db: State<'_, Db>, query: String) -> AppResult<Vec<MessageSummary>> {
+    db.search_all_messages(&query)
+}
+
+#[tauri::command]
+pub async fn search_messages_advanced(
+    db: State<'_, Db>,
+    query: String,
+    from: Option<String>,
+    date_from: Option<i64>,
+    date_to: Option<i64>,
+    has_attachment: bool,
+) -> AppResult<Vec<MessageSummary>> {
+    db.search_all_messages_advanced(&query, from.as_deref(), date_from, date_to, has_attachment)
+}
+
+#[tauri::command]
+pub async fn set_message_category(
+    db: State<'_, Db>,
+    account_id: String,
+    folder: String,
+    uid: u32,
+    category: Option<String>,
+) -> AppResult<()> {
+    db.set_message_category(&account_id, &folder, uid, category.as_deref())
+}
+
+#[tauri::command]
+pub async fn snooze_message(
+    db: State<'_, Db>,
+    account_id: String,
+    folder: String,
+    uid: u32,
+    until_ts: i64,
+) -> AppResult<()> {
+    db.snooze_message(&account_id, &folder, uid, until_ts)
+}
+
+#[tauri::command]
+pub async fn unsnooze_message(db: State<'_, Db>, account_id: String, folder: String, uid: u32) -> AppResult<()> {
+    db.unsnooze_message(&account_id, &folder, uid)
+}
+
+#[tauri::command]
+pub async fn list_snoozed_messages(db: State<'_, Db>) -> AppResult<Vec<crate::models::SnoozedMessage>> {
+    db.list_snoozed_messages()
+}
+
+#[tauri::command]
+pub async fn list_templates(db: State<'_, Db>) -> AppResult<Vec<crate::models::Template>> {
+    db.list_templates()
+}
+
+#[tauri::command]
+pub async fn create_template(db: State<'_, Db>, new_template: crate::models::NewTemplate) -> AppResult<crate::models::Template> {
+    db.create_template(&new_template)
+}
+
+#[tauri::command]
+pub async fn update_template(db: State<'_, Db>, template: crate::models::Template) -> AppResult<()> {
+    db.update_template(&template)
+}
+
+#[tauri::command]
+pub async fn delete_template(db: State<'_, Db>, template_id: String) -> AppResult<()> {
+    db.delete_template(&template_id)
+}
+
+#[tauri::command]
+pub async fn toggle_flag(
+    db: State<'_, Db>,
+    account_id: String,
+    folder: String,
+    uid: u32,
+    flagged: bool,
+) -> AppResult<()> {
+    let account = find_account(&db, &account_id)?;
+    if account.protocol == Protocol::Imap {
+        let folder_c = folder.clone();
+        tauri::async_runtime::spawn_blocking(move || -> AppResult<()> {
+            let mut session = imap_client::open_session(&account)?;
+            imap_client::set_flag(&mut session, &folder_c, uid, "\\Flagged", flagged)?;
+            let _ = session.logout();
+            Ok(())
+        })
+        .await
+        .map_err(|e| AppError::Other(e.to_string()))??;
+    }
+    db.set_flagged(&account_id, &folder, uid, flagged)
+}
+
+#[tauri::command]
+pub async fn move_message(
+    db: State<'_, Db>,
+    account_id: String,
+    folder: String,
+    uid: u32,
+    target_folder: String,
+) -> AppResult<()> {
+    let account = find_account(&db, &account_id)?;
+    if account.protocol != Protocol::Imap {
+        return Err(AppError::Other(
+            "Verschieben wird nur für IMAP-Konten unterstützt".into(),
+        ));
+    }
+    let folder_c = folder.clone();
+    let target_c = target_folder.clone();
+
+    tauri::async_runtime::spawn_blocking(move || -> AppResult<()> {
+        let mut session = imap_client::open_session(&account)?;
+        imap_client::move_message(&mut session, &folder_c, uid, &target_c)?;
+        let _ = session.logout();
+        Ok(())
+    })
+    .await
+    .map_err(|e| AppError::Other(e.to_string()))??;
+
+    db.delete_message(&account_id, &folder, uid)
+}
+
+#[tauri::command]
+pub async fn delete_message(
+    db: State<'_, Db>,
+    account_id: String,
+    folder: String,
+    uid: u32,
+) -> AppResult<()> {
+    let account = find_account(&db, &account_id)?;
+
+    if account.protocol == Protocol::Local {
+        db.delete_local_body(&folder, uid)?;
+        return db.delete_message(&account_id, &folder, uid);
+    }
+
+    let folder_c = folder.clone();
+
+    tauri::async_runtime::spawn_blocking(move || -> AppResult<()> {
+        match account.protocol {
+            Protocol::Imap => {
+                let mut session = imap_client::open_session(&account)?;
+                imap_client::delete_message(&mut session, &folder_c, uid)?;
+                let _ = session.logout();
+                Ok(())
+            }
+            Protocol::Pop3 => {
+                let password = accounts::get_password(&account.id)?;
+                let mut session = pop3_client::connect(
+                    &account.incoming_host,
+                    account.incoming_port,
+                    &account.username,
+                    &password,
+                )?;
+                session.delete(uid)?;
+                session.quit();
+                Ok(())
+            }
+            Protocol::Local => unreachable!(),
+        }
+    })
+    .await
+    .map_err(|e| AppError::Other(e.to_string()))??;
+
+    db.delete_message(&account_id, &folder, uid)
+}
+
+#[tauri::command]
+pub async fn export_contacts_vcard(db: State<'_, Db>, path: String) -> AppResult<usize> {
+    let contacts = db.list_contacts()?;
+    let count = contacts.len();
+    let out = vcard::export(&contacts);
+    std::fs::write(&path, out).map_err(|e| AppError::Other(e.to_string()))?;
+    Ok(count)
+}
+
+#[tauri::command]
+pub async fn import_contacts_vcard(db: State<'_, Db>, path: String) -> AppResult<usize> {
+    let data = std::fs::read_to_string(&path).map_err(|e| AppError::Other(e.to_string()))?;
+    let cards = vcard::parse(&data);
+    let count = cards.len();
+    for card in cards {
+        db.upsert_contact(&card.name, &card.email, card.company.as_deref(), card.notes.as_deref())?;
+    }
+    Ok(count)
+}
+
+async fn fetch_raw_for_export(
+    db: &Db,
+    account_id: &str,
+    folder: &str,
+    uid: u32,
+) -> AppResult<Vec<u8>> {
+    let account = find_account(db, account_id)?;
+    if account.protocol == Protocol::Local {
+        return db.get_local_body(folder, uid);
+    }
+    let folder = folder.to_string();
+    tauri::async_runtime::spawn_blocking(move || -> AppResult<Vec<u8>> {
+        match account.protocol {
+            Protocol::Imap => {
+                let mut session = imap_client::open_session(&account)?;
+                let raw = imap_client::fetch_raw(&mut session, &folder, uid);
+                let _ = session.logout();
+                raw
+            }
+            Protocol::Pop3 => {
+                let password = accounts::get_password(&account.id)?;
+                let mut session = pop3_client::connect(
+                    &account.incoming_host,
+                    account.incoming_port,
+                    &account.username,
+                    &password,
+                )?;
+                let raw = session.retr_raw(uid);
+                session.quit();
+                raw
+            }
+            Protocol::Local => unreachable!(),
+        }
+    })
+    .await
+    .map_err(|e| AppError::Other(e.to_string()))?
+}
+
+#[tauri::command]
+pub async fn export_message_eml(
+    db: State<'_, Db>,
+    account_id: String,
+    folder: String,
+    uid: u32,
+    path: String,
+) -> AppResult<()> {
+    let raw = fetch_raw_for_export(&db, &account_id, &folder, uid).await?;
+    std::fs::write(&path, raw).map_err(|e| AppError::Other(e.to_string()))?;
+    Ok(())
+}
+
+async fn fetch_folder_entries(db: &Db, account: &Account, folder: &str) -> AppResult<Vec<(String, i64, Vec<u8>)>> {
+    if account.protocol == Protocol::Local {
+        let summaries = db.list_messages(&account.id, folder)?;
+        return Ok(summaries
+            .into_iter()
+            .filter_map(|s| db.get_local_body(folder, s.uid).ok().map(|raw| (s.from_addr, s.timestamp, raw)))
+            .collect());
+    }
+    let account = account.clone();
+    let account_id = account.id.clone();
+    let folder_c = folder.to_string();
+    tauri::async_runtime::spawn_blocking(move || -> AppResult<Vec<(String, i64, Vec<u8>)>> {
+        match account.protocol {
+            Protocol::Imap => {
+                let mut session = imap_client::open_session(&account)?;
+                let raws = imap_client::export_folder(&mut session, &folder_c)?;
+                let _ = session.logout();
+                Ok(raws
+                    .into_iter()
+                    .map(|raw| {
+                        let summary = mailutil::parse_message_summary(&account_id, &folder_c, 0, &raw);
+                        (summary.from_addr, summary.timestamp, raw)
+                    })
+                    .collect())
+            }
+            Protocol::Pop3 => {
+                let password = accounts::get_password(&account.id)?;
+                let mut session = pop3_client::connect(
+                    &account.incoming_host,
+                    account.incoming_port,
+                    &account.username,
+                    &password,
+                )?;
+                let raws = session.export_all(&account_id)?;
+                session.quit();
+                Ok(raws
+                    .into_iter()
+                    .map(|raw| {
+                        let summary = mailutil::parse_message_summary(&account_id, &folder_c, 0, &raw);
+                        (summary.from_addr, summary.timestamp, raw)
+                    })
+                    .collect())
+            }
+            Protocol::Local => unreachable!(),
+        }
+    })
+    .await
+    .map_err(|e| AppError::Other(e.to_string()))?
+}
+
+#[tauri::command]
+pub async fn export_folder_mbox(
+    db: State<'_, Db>,
+    account_id: String,
+    folder: String,
+    path: String,
+) -> AppResult<usize> {
+    let account = find_account(&db, &account_id)?;
+    let entries = fetch_folder_entries(&db, &account, &folder).await?;
+
+    let count = entries.len();
+    let mut out = Vec::new();
+    for (from_addr, timestamp, raw) in entries {
+        mbox::append_entry(&mut out, &from_addr, timestamp, &raw);
+    }
+    std::fs::write(&path, out).map_err(|e| AppError::Other(e.to_string()))?;
+    Ok(count)
+}
+
+fn sanitize_filename(s: &str) -> String {
+    s.chars()
+        .map(|c| if c.is_alphanumeric() || c == '.' || c == '-' || c == '_' || c == '@' { c } else { '_' })
+        .collect()
+}
+
+/// Backs up every account's every folder as one .mbox file per account into `dir`.
+/// Used for a full local mailbox backup, distinct from the per-folder export above.
+#[tauri::command]
+pub async fn export_full_backup(db: State<'_, Db>, dir: String) -> AppResult<usize> {
+    let accounts = db.list_accounts()?;
+    let mut total = 0usize;
+
+    for account in &accounts {
+        let folders = if account.protocol == Protocol::Pop3 {
+            vec![Folder { name: "INBOX".into(), display_name: "Posteingang".into(), unread: 0 }]
+        } else if account.protocol == Protocol::Local {
+            let mut fs = vec![
+                Folder { name: Db::DRAFTS_FOLDER.into(), display_name: Db::DRAFTS_FOLDER.into(), unread: 0 },
+                Folder { name: Db::LOCAL_FOLDER.into(), display_name: Db::LOCAL_FOLDER.into(), unread: 0 },
+            ];
+            for name in db.list_local_folders()? {
+                fs.push(Folder { name: name.clone(), display_name: name, unread: 0 });
+            }
+            fs
+        } else {
+            let account_c = account.clone();
+            tauri::async_runtime::spawn_blocking(move || -> AppResult<Vec<Folder>> {
+                let mut session = imap_client::open_session(&account_c)?;
+                let folders = imap_client::list_folders(&mut session);
+                let _ = session.logout();
+                folders
+            })
+            .await
+            .map_err(|e| AppError::Other(e.to_string()))??
+        };
+
+        let mut out = Vec::new();
+        for folder in &folders {
+            if let Ok(entries) = fetch_folder_entries(&db, account, &folder.name).await {
+                total += entries.len();
+                for (from_addr, timestamp, raw) in entries {
+                    mbox::append_entry(&mut out, &from_addr, timestamp, &raw);
+                }
+            }
+        }
+        if !out.is_empty() {
+            let filename = format!("{}.mbox", sanitize_filename(&account.label));
+            let path = std::path::Path::new(&dir).join(filename);
+            std::fs::write(&path, out).map_err(|e| AppError::Other(e.to_string()))?;
+        }
+    }
+    Ok(total)
+}
+
+#[tauri::command]
+pub async fn import_eml_file(
+    db: State<'_, Db>,
+    account_id: String,
+    folder: String,
+    path: String,
+) -> AppResult<()> {
+    let account = find_account(&db, &account_id)?;
+    let raw = std::fs::read(&path).map_err(|e| AppError::Other(e.to_string()))?;
+    import_raw_messages(&db, &account, &folder, vec![raw]).await?;
+    Ok(())
+}
+
+#[tauri::command]
+pub async fn import_mbox_file(
+    db: State<'_, Db>,
+    account_id: String,
+    folder: String,
+    path: String,
+) -> AppResult<usize> {
+    let account = find_account(&db, &account_id)?;
+    let data = std::fs::read(&path).map_err(|e| AppError::Other(e.to_string()))?;
+    let entries = mbox::split_entries(&data);
+    let count = entries.len();
+    import_raw_messages(&db, &account, &folder, entries).await?;
+    Ok(count)
+}
+
+async fn import_raw_messages(
+    db: &Db,
+    account: &Account,
+    folder: &str,
+    raws: Vec<Vec<u8>>,
+) -> AppResult<()> {
+    match account.protocol {
+        Protocol::Local => {
+            for raw in raws {
+                let uid = db.next_local_uid(folder)?;
+                db.save_local_body(folder, uid, &raw)?;
+                let summary = mailutil::parse_message_summary(Db::LOCAL_ACCOUNT_ID, folder, uid, &raw);
+                db.upsert_messages(&[summary.clone()])?;
+                let _ = db.touch_contact(&summary.from_name, &summary.from_addr);
+            }
+            Ok(())
+        }
+        Protocol::Imap => {
+            let account = account.clone();
+            let folder = folder.to_string();
+            tauri::async_runtime::spawn_blocking(move || -> AppResult<()> {
+                let mut session = imap_client::open_session(&account)?;
+                for raw in &raws {
+                    let _ = imap_client::append_message(&mut session, &folder, raw);
+                }
+                let _ = session.logout();
+                Ok(())
+            })
+            .await
+            .map_err(|e| AppError::Other(e.to_string()))?
+        }
+        Protocol::Pop3 => Err(AppError::Other(
+            "Import wird für POP3-Konten nicht unterstützt".into(),
+        )),
+    }
+}
+
+#[tauri::command]
+pub async fn save_draft(db: State<'_, Db>, uid: Option<u32>, message: ComposeMessage) -> AppResult<u32> {
+    let from_email = find_account(&db, &message.account_id)
+        .map(|a| a.email)
+        .unwrap_or_default();
+    let raw = format!(
+        "From: {}\r\nTo: {}\r\nCc: {}\r\nSubject: {}\r\nDate: {}\r\nX-Compose-Account: {}\r\nContent-Type: text/html; charset=utf-8\r\nMIME-Version: 1.0\r\n\r\n{}",
+        from_email,
+        message.to,
+        message.cc.unwrap_or_default(),
+        message.subject,
+        chrono::Local::now().to_rfc2822(),
+        message.account_id,
+        message.body_html,
+    );
+    let uid = match uid {
+        Some(u) => u,
+        None => db.next_local_uid(Db::DRAFTS_FOLDER)?,
+    };
+    db.save_local_body(Db::DRAFTS_FOLDER, uid, raw.as_bytes())?;
+    let summary = mailutil::parse_message_summary(Db::LOCAL_ACCOUNT_ID, Db::DRAFTS_FOLDER, uid, raw.as_bytes());
+    db.upsert_messages(&[summary])?;
+    Ok(uid)
+}
+
+#[tauri::command]
+pub async fn load_draft(db: State<'_, Db>, uid: u32) -> AppResult<DraftPayload> {
+    let raw = db.get_local_body(Db::DRAFTS_FOLDER, uid)?;
+    let parsed = parse_mail(&raw).map_err(|e| AppError::Parse(e.to_string()))?;
+    let get = |name: &str| parsed.headers.get_first_value(name).unwrap_or_default();
+    Ok(DraftPayload {
+        uid,
+        account_id: parsed.headers.get_first_value("X-Compose-Account"),
+        to: get("To"),
+        cc: get("Cc"),
+        subject: get("Subject"),
+        body: parsed.get_body().unwrap_or_default(),
+    })
+}
+
+#[tauri::command]
+pub async fn google_oauth_add_account(app: tauri::AppHandle, db: State<'_, Db>) -> AppResult<Account> {
+    let (email, refresh_token) = tauri::async_runtime::spawn_blocking(crate::oauth::run_google_login)
+        .await
+        .map_err(|e| AppError::Other(e.to_string()))??;
+    let created = accounts::create_google_account(&db, email, &refresh_token)?;
+    crate::idle::spawn_watcher(app, created.id.clone());
+    Ok(created)
+}
+
+#[tauri::command]
+pub async fn list_rules(db: State<'_, Db>) -> AppResult<Vec<Rule>> {
+    db.list_rules()
+}
+
+#[tauri::command]
+pub async fn create_rule(db: State<'_, Db>, new_rule: NewRule) -> AppResult<Rule> {
+    db.create_rule(new_rule)
+}
+
+#[tauri::command]
+pub async fn set_rule_enabled(db: State<'_, Db>, rule_id: String, enabled: bool) -> AppResult<()> {
+    db.set_rule_enabled(&rule_id, enabled)
+}
+
+#[tauri::command]
+pub async fn delete_rule(db: State<'_, Db>, rule_id: String) -> AppResult<()> {
+    db.delete_rule(&rule_id)
+}
+
+#[tauri::command]
+pub async fn list_events(db: State<'_, Db>, start_ts: i64, end_ts: i64) -> AppResult<Vec<Event>> {
+    let raw = db.list_events_in_range(start_ts, end_ts)?;
+    let mut out = Vec::new();
+    for e in raw {
+        if let Some(rule) = e.rrule.clone() {
+            let exdates = parse_exdates(e.exdates.as_deref());
+            for (occ_start, occ_end) in crate::recurrence::expand(e.start_ts, e.end_ts, &rule, start_ts, end_ts, &exdates) {
+                out.push(Event {
+                    id: format!("{}#{}", e.id, occ_start),
+                    base_id: e.id.clone(),
+                    title: e.title.clone(),
+                    location: e.location.clone(),
+                    description: e.description.clone(),
+                    start_ts: occ_start,
+                    end_ts: occ_end,
+                    all_day: e.all_day,
+                    account_id: e.account_id.clone(),
+                    google_event_id: e.google_event_id.clone(),
+                    rrule: e.rrule.clone(),
+                    reminder_minutes: e.reminder_minutes,
+                    category: e.category.clone(),
+                    exdates: None,
+                    series_id: None,
+                });
+            }
+        } else {
+            out.push(e);
+        }
+    }
+    Ok(out)
+}
+
+fn parse_exdates(raw: Option<&str>) -> Vec<i64> {
+    raw.unwrap_or("").split(',').filter_map(|s| s.trim().parse().ok()).collect()
+}
+
+/// Edits a single occurrence of a recurring series without touching the rest: adds
+/// the original occurrence to the base series' EXDATE-equivalent list, then creates
+/// a standalone override event carrying the edited fields. Local (non-Google) series
+/// only — Google's recurring-instance API (`recurringEventId`/`originalStartTime`)
+/// isn't implemented, so Google-linked series still only support whole-series edits.
+#[tauri::command]
+pub async fn update_event_occurrence(
+    db: State<'_, Db>,
+    base_id: String,
+    occurrence_start: i64,
+    mut data: NewEvent,
+) -> AppResult<Event> {
+    db.add_event_exdate(&base_id, occurrence_start)?;
+    data.rrule = None;
+    let created = db.create_event(data)?;
+    db.set_event_series_id(&created.id, &base_id)?;
+    db.get_event(&created.id)
+}
+
+/// Removes a single occurrence from a recurring series (no override event created —
+/// the slot just becomes excluded, same as an outright cancellation).
+#[tauri::command]
+pub async fn delete_event_occurrence(db: State<'_, Db>, base_id: String, occurrence_start: i64) -> AppResult<()> {
+    db.add_event_exdate(&base_id, occurrence_start)
+}
+
+#[tauri::command]
+pub async fn set_desktop_notifications_enabled(
+    state: State<'_, crate::idle::NotificationSettings>,
+    enabled: bool,
+) -> AppResult<()> {
+    state.0.store(enabled, std::sync::atomic::Ordering::Relaxed);
+    Ok(())
+}
+
+#[tauri::command]
+pub async fn get_event(db: State<'_, Db>, event_id: String) -> AppResult<Event> {
+    db.get_event(&event_id)
+}
+
+#[tauri::command]
+pub async fn list_upcoming_reminders(db: State<'_, Db>, within_hours: i64) -> AppResult<Vec<Event>> {
+    let now = chrono::Utc::now().timestamp();
+    let end = now + within_hours * 3600;
+    let bases = db.list_events_with_reminders()?;
+    let mut out = Vec::new();
+    for e in bases {
+        let occurrences = if let Some(rule) = &e.rrule {
+            let exdates = parse_exdates(e.exdates.as_deref());
+            crate::recurrence::expand(e.start_ts, e.end_ts, rule, now, end, &exdates)
+        } else if e.start_ts >= now && e.start_ts < end {
+            vec![(e.start_ts, e.end_ts)]
+        } else {
+            vec![]
+        };
+        for (occ_start, occ_end) in occurrences {
+            out.push(Event {
+                id: format!("{}#{}", e.id, occ_start),
+                base_id: e.id.clone(),
+                title: e.title.clone(),
+                location: e.location.clone(),
+                description: e.description.clone(),
+                start_ts: occ_start,
+                end_ts: occ_end,
+                all_day: e.all_day,
+                account_id: e.account_id.clone(),
+                google_event_id: e.google_event_id.clone(),
+                rrule: e.rrule.clone(),
+                reminder_minutes: e.reminder_minutes,
+                category: e.category.clone(),
+                exdates: None,
+                series_id: None,
+            });
+        }
+    }
+    out.sort_by_key(|e| e.start_ts);
+    Ok(out)
+}
+
+async fn push_event_to_google(account: &Account, event: &Event) -> AppResult<String> {
+    let refresh_token = accounts::get_password(&account.id)?;
+    let event = event.clone();
+    tauri::async_runtime::spawn_blocking(move || -> AppResult<String> {
+        let access_token = crate::oauth::refresh_access_token(&refresh_token)?;
+        crate::gcal::insert_event(&access_token, &event)
+    })
+    .await
+    .map_err(|e| AppError::Other(e.to_string()))?
+}
+
+async fn push_event_update_to_google(account: &Account, google_id: &str, event: &Event) -> AppResult<()> {
+    let refresh_token = accounts::get_password(&account.id)?;
+    let event = event.clone();
+    let google_id = google_id.to_string();
+    tauri::async_runtime::spawn_blocking(move || -> AppResult<()> {
+        let access_token = crate::oauth::refresh_access_token(&refresh_token)?;
+        crate::gcal::update_event(&access_token, &google_id, &event)
+    })
+    .await
+    .map_err(|e| AppError::Other(e.to_string()))?
+}
+
+async fn push_event_delete_to_google(account: &Account, google_id: &str) -> AppResult<()> {
+    let refresh_token = accounts::get_password(&account.id)?;
+    let google_id = google_id.to_string();
+    tauri::async_runtime::spawn_blocking(move || -> AppResult<()> {
+        let access_token = crate::oauth::refresh_access_token(&refresh_token)?;
+        crate::gcal::delete_event(&access_token, &google_id)
+    })
+    .await
+    .map_err(|e| AppError::Other(e.to_string()))?
+}
+
+#[tauri::command]
+pub async fn create_event(db: State<'_, Db>, new_event: NewEvent) -> AppResult<Event> {
+    let created = db.create_event(new_event)?;
+    if let Some(account_id) = created.account_id.clone() {
+        if let Ok(account) = find_account(&db, &account_id) {
+            if account.auth_method == AuthMethod::GoogleOauth {
+                match push_event_to_google(&account, &created).await {
+                    Ok(google_id) => db.set_event_google_id(&created.id, &google_id)?,
+                    Err(e) => {
+                        db.delete_event(&created.id)?;
+                        return Err(e);
+                    }
+                }
+            }
+        } else if let Ok(creds) = caldav_creds(&db, &account_id) {
+            let created_c = created.clone();
+            match tauri::async_runtime::spawn_blocking(move || crate::caldav::create_event(&creds, &created_c))
+                .await
+                .map_err(|e| AppError::Other(e.to_string()))?
+            {
+                Ok(href) => db.set_event_google_id(&created.id, &href)?,
+                Err(e) => {
+                    db.delete_event(&created.id)?;
+                    return Err(e);
+                }
+            }
+        }
+    }
+    db.get_event(&created.id)
+}
+
+#[tauri::command]
+pub async fn update_event(db: State<'_, Db>, event: Event) -> AppResult<()> {
+    db.update_event(&event)?;
+    if let (Some(account_id), Some(google_id)) = (event.account_id.clone(), event.google_event_id.clone()) {
+        if let Ok(account) = find_account(&db, &account_id) {
+            if account.auth_method == AuthMethod::GoogleOauth {
+                push_event_update_to_google(&account, &google_id, &event).await?;
+            }
+        } else if let Ok(creds) = caldav_creds(&db, &account_id) {
+            let event_c = event.clone();
+            tauri::async_runtime::spawn_blocking(move || crate::caldav::update_event(&creds, &google_id, &event_c))
+                .await
+                .map_err(|e| AppError::Other(e.to_string()))??;
+        }
+    }
+    Ok(())
+}
+
+#[tauri::command]
+pub async fn delete_event(db: State<'_, Db>, event_id: String) -> AppResult<()> {
+    if let Ok(event) = db.get_event(&event_id) {
+        if let (Some(account_id), Some(google_id)) = (&event.account_id, &event.google_event_id) {
+            if let Ok(account) = find_account(&db, account_id) {
+                if account.auth_method == AuthMethod::GoogleOauth {
+                    let _ = push_event_delete_to_google(&account, google_id).await;
+                }
+            } else if let Ok(creds) = caldav_creds(&db, account_id) {
+                let google_id = google_id.clone();
+                let _ = tauri::async_runtime::spawn_blocking(move || crate::caldav::delete_event(&creds, &google_id)).await;
+            }
+        }
+    }
+    db.delete_event(&event_id)
+}
+
+#[tauri::command]
+pub async fn list_caldav_accounts(db: State<'_, Db>) -> AppResult<Vec<crate::models::CaldavAccount>> {
+    db.list_caldav_accounts()
+}
+
+#[tauri::command]
+pub async fn add_caldav_account(db: State<'_, Db>, new_account: crate::models::NewCaldavAccount) -> AppResult<crate::models::CaldavAccount> {
+    let id = uuid::Uuid::new_v4().to_string();
+    // Verify the URL/credentials actually work before saving anything, so a typo'd
+    // URL or wrong password doesn't silently sit there as a "connected" account.
+    let creds = crate::caldav::CaldavCreds {
+        url: new_account.url.clone(),
+        username: new_account.username.clone(),
+        password: new_account.password.clone(),
+    };
+    tauri::async_runtime::spawn_blocking(move || crate::caldav::list_events(&creds))
+        .await
+        .map_err(|e| AppError::Other(e.to_string()))??;
+    accounts::store_password(&id, &new_account.password)?;
+    db.create_caldav_account(&id, &new_account.label, &new_account.url, &new_account.username)?;
+    db.get_caldav_account(&id)
+}
+
+#[tauri::command]
+pub async fn delete_caldav_account(db: State<'_, Db>, account_id: String) -> AppResult<()> {
+    accounts::delete_password(&account_id)?;
+    db.delete_caldav_account(&account_id)
+}
+
+/// Pulls every VEVENT from the CalDAV collection and replaces every locally-cached
+/// event previously synced from this account — same delete+reinsert-everything
+/// approach as `sync_google_calendar`, reusing `replace_google_events` (it's
+/// generic over "an external account id", not actually Google-specific). Unlike
+/// the Google path, this fetches unconditionally (no time-range filter) since
+/// hand-rolling a correct CalDAV `<c:time-range>` filter without a real server to
+/// test against was judged too likely to silently miss events.
+#[tauri::command]
+pub async fn sync_caldav_calendar(db: State<'_, Db>, account_id: String) -> AppResult<usize> {
+    let creds = caldav_creds(&db, &account_id)?;
+    let fetched = tauri::async_runtime::spawn_blocking(move || crate::caldav::list_events(&creds))
+        .await
+        .map_err(|e| AppError::Other(e.to_string()))??;
+
+    let events: Vec<Event> = fetched
+        .into_iter()
+        .map(|(href, mut event)| {
+            event.google_event_id = Some(href);
+            event
+        })
+        .collect();
+    db.replace_google_events(&account_id, i64::MIN, i64::MAX, &events)
+}
+
+#[tauri::command]
+pub async fn sync_google_calendar(db: State<'_, Db>, account_id: String) -> AppResult<usize> {
+    let account = find_account(&db, &account_id)?;
+    if account.auth_method != AuthMethod::GoogleOauth {
+        return Err(AppError::Other("Nur für Google-Konten verfügbar".into()));
+    }
+    let refresh_token = accounts::get_password(&account.id)?;
+    let now = chrono::Utc::now().timestamp();
+    let time_min = now - 30 * 86400;
+    let time_max = now + 180 * 86400;
+
+    let gevents = tauri::async_runtime::spawn_blocking(move || -> AppResult<Vec<Event>> {
+        let access_token = crate::oauth::refresh_access_token(&refresh_token)?;
+        crate::gcal::list_events(&access_token, time_min, time_max)
+    })
+    .await
+    .map_err(|e| AppError::Other(e.to_string()))??;
+
+    db.replace_google_events(&account_id, time_min, time_max, &gevents)
+}
+
+#[tauri::command]
+pub async fn sync_google_contacts(db: State<'_, Db>, account_id: String) -> AppResult<usize> {
+    let account = find_account(&db, &account_id)?;
+    if account.auth_method != AuthMethod::GoogleOauth {
+        return Err(AppError::Other("Nur für Google-Konten verfügbar".into()));
+    }
+    let refresh_token = accounts::get_password(&account.id)?;
+
+    let contacts = tauri::async_runtime::spawn_blocking(move || -> AppResult<Vec<crate::gcontacts::ParsedContact>> {
+        let access_token = crate::oauth::refresh_access_token(&refresh_token)?;
+        crate::gcontacts::list_contacts(&access_token)
+    })
+    .await
+    .map_err(|e| AppError::Other(e.to_string()))??;
+
+    let count = contacts.len();
+    for c in contacts {
+        db.upsert_google_contact(
+            &c.name,
+            c.email.as_deref(),
+            c.phone.as_deref(),
+            c.address.as_deref(),
+            c.company.as_deref(),
+            &account_id,
+            &c.resource_name,
+        )?;
+    }
+    Ok(count)
+}
+
+async fn push_contact_delete_to_google(account: &Account, resource_name: &str) -> AppResult<()> {
+    let refresh_token = accounts::get_password(&account.id)?;
+    let resource_name = resource_name.to_string();
+    tauri::async_runtime::spawn_blocking(move || -> AppResult<()> {
+        let access_token = crate::oauth::refresh_access_token(&refresh_token)?;
+        crate::gcontacts::delete_contact(&access_token, &resource_name)
+    })
+    .await
+    .map_err(|e| AppError::Other(e.to_string()))?
+}
+
+#[tauri::command]
+pub async fn reconnect_google_account(db: State<'_, Db>, account_id: String) -> AppResult<()> {
+    let account = find_account(&db, &account_id)?;
+    if account.auth_method != AuthMethod::GoogleOauth {
+        return Err(AppError::Other("Nur für Google-Konten verfügbar".into()));
+    }
+    let (_, refresh_token) = tauri::async_runtime::spawn_blocking(crate::oauth::run_google_login)
+        .await
+        .map_err(|e| AppError::Other(e.to_string()))??;
+    accounts::store_password(&account_id, &refresh_token)?;
+    Ok(())
+}
+
+fn import_ics_events(db: &Db, text: &str) -> AppResult<usize> {
+    let events = ics::parse(text);
+    let count = events.len();
+    for event in events {
+        db.insert_event(&event)?;
+    }
+    Ok(count)
+}
+
+#[tauri::command]
+pub async fn import_ics_file(db: State<'_, Db>, path: String) -> AppResult<usize> {
+    let data = std::fs::read_to_string(&path).map_err(|e| AppError::Other(e.to_string()))?;
+    import_ics_events(&db, &data)
+}
+
+#[tauri::command]
+pub async fn import_ics_text(db: State<'_, Db>, text: String) -> AppResult<usize> {
+    import_ics_events(&db, &text)
+}
+
+/// Parses just enough of an .ics attachment to show an invite preview (organizer,
+/// title, time) before the user decides to Accept/Decline/Tentative. Returns None
+/// if it doesn't look like a real invite (no organizer found).
+#[tauri::command]
+pub async fn preview_invite(ics_base64: String) -> AppResult<Option<crate::ics::InviteInfo>> {
+    use base64::Engine;
+    let raw = base64::engine::general_purpose::STANDARD
+        .decode(&ics_base64)
+        .map_err(|e| AppError::Other(e.to_string()))?;
+    let text = String::from_utf8_lossy(&raw).to_string();
+    Ok(ics::parse_invite(&text).filter(|i| i.organizer_email.is_some()))
+}
+
+/// Replies to a meeting invite (Accept/Decline/Tentative): sends an iTIP
+/// METHOD:REPLY .ics back to the organizer via the account's SMTP, and (unless
+/// declined) adds the event to the local calendar. This only handles the
+/// attendee side of iTIP — not full RFC 5546 (no CANCEL/REQUEST processing).
+#[tauri::command]
+pub async fn reply_to_invite(
+    db: State<'_, Db>,
+    account_id: String,
+    ics_base64: String,
+    response: String,
+) -> AppResult<()> {
+    use base64::Engine;
+    let account = find_account(&db, &account_id)?;
+    let raw = base64::engine::general_purpose::STANDARD
+        .decode(&ics_base64)
+        .map_err(|e| AppError::Other(e.to_string()))?;
+    let text = String::from_utf8_lossy(&raw).to_string();
+
+    let invite = ics::parse_invite(&text)
+        .ok_or_else(|| AppError::Other("Keine gültige Termineinladung gefunden".into()))?;
+    let organizer = invite
+        .organizer_email
+        .clone()
+        .ok_or_else(|| AppError::Other("Kein Organisator in der Einladung gefunden".into()))?;
+
+    let (partstat, verb) = match response.as_str() {
+        "accepted" => ("ACCEPTED", "angenommen"),
+        "declined" => ("DECLINED", "abgelehnt"),
+        "tentative" => ("TENTATIVE", "mit Vorbehalt beantwortet"),
+        _ => return Err(AppError::Other("Ungültige Antwort".into())),
+    };
+    let reply_ics = ics::build_reply(&invite, &account.email, partstat);
+
+    let attachment = crate::models::OutgoingAttachment {
+        filename: "antwort.ics".into(),
+        mime_type: "text/calendar; method=REPLY".into(),
+        content_base64: base64::engine::general_purpose::STANDARD.encode(reply_ics.as_bytes()),
+    };
+    let message = crate::models::ComposeMessage {
+        account_id: account_id.clone(),
+        to: organizer,
+        cc: None,
+        bcc: None,
+        subject: format!("Beantwortet: {}", invite.summary),
+        body_html: format!(
+            "<p>{} hat die Einladung „{}“ {}.</p>",
+            account.email, invite.summary, verb
+        ),
+        attachments: vec![attachment],
+        in_reply_to: None,
+        reply_to: None,
+        request_read_receipt: false,
+        importance: None,
+    };
+    smtp_client::send(&account, message).await?;
+
+    if response != "declined" {
+        let mut events = ics::parse(&text);
+        if let Some(mut ev) = events.pop() {
+            if response == "tentative" {
+                ev.category = Some("yellow".into());
+            }
+            db.insert_event(&ev)?;
+        }
+    }
+    Ok(())
+}
+
+#[tauri::command]
+pub async fn export_events_ics(db: State<'_, Db>, path: String) -> AppResult<usize> {
+    let events = db.list_all_events()?;
+    let count = events.len();
+    let out = ics::export(&events);
+    std::fs::write(&path, out).map_err(|e| AppError::Other(e.to_string()))?;
+    Ok(count)
+}
+
+#[tauri::command]
+pub async fn list_tasks(db: State<'_, Db>) -> AppResult<Vec<Task>> {
+    db.list_tasks()
+}
+
+#[tauri::command]
+pub async fn create_task(db: State<'_, Db>, new_task: NewTask) -> AppResult<Task> {
+    db.create_task(new_task)
+}
+
+#[tauri::command]
+pub async fn update_task(db: State<'_, Db>, task: Task) -> AppResult<()> {
+    db.update_task(&task)
+}
+
+#[tauri::command]
+pub async fn delete_task(db: State<'_, Db>, task_id: String) -> AppResult<()> {
+    db.delete_task(&task_id)
+}
+
+#[tauri::command]
+pub async fn set_task_completed(db: State<'_, Db>, task_id: String, completed: bool) -> AppResult<()> {
+    db.set_task_completed(&task_id, completed)
+}
+
+#[tauri::command]
+pub async fn create_task_from_message(
+    db: State<'_, Db>,
+    account_id: String,
+    folder: String,
+    uid: u32,
+    title: String,
+) -> AppResult<Task> {
+    db.create_task(NewTask {
+        title,
+        description: None,
+        due_ts: None,
+        priority: TaskPriority::Normal,
+        source_account_id: Some(account_id),
+        source_folder: Some(folder),
+        source_uid: Some(uid),
+    })
+}
+
+#[tauri::command]
+pub async fn list_contact_groups(db: State<'_, Db>) -> AppResult<Vec<ContactGroup>> {
+    db.list_contact_groups()
+}
+
+#[tauri::command]
+pub async fn create_contact_group(db: State<'_, Db>, new_group: NewContactGroup) -> AppResult<ContactGroup> {
+    db.create_contact_group(new_group)
+}
+
+#[tauri::command]
+pub async fn update_contact_group(db: State<'_, Db>, group: ContactGroup) -> AppResult<()> {
+    db.update_contact_group(&group)
+}
+
+#[tauri::command]
+pub async fn delete_contact_group(db: State<'_, Db>, group_id: String) -> AppResult<()> {
+    db.delete_contact_group(&group_id)
+}
diff --git a/src-tauri/src/db.rs b/src-tauri/src/db.rs
new file mode 100644
index 0000000..bbec16c
--- /dev/null
+++ b/src-tauri/src/db.rs
@@ -0,0 +1,1530 @@
+use crate::error::AppResult;
+use crate::models::{
+    Account, AuthMethod, Contact, ContactGroup, Event, MessageSummary, NewContact, NewContactGroup, NewEvent,
+    NewRule, NewTask, NewVacationSettings, Protocol, Rule, RuleAction, Task, TaskPriority, VacationSettings,
+};
+use rusqlite::{params, Connection, OptionalExtension};
+use std::path::Path;
+use std::sync::Mutex;
+use uuid::Uuid;
+
+pub struct Db(pub Mutex<Connection>);
+
+impl Db {
+    pub fn open(dir: &Path) -> AppResult<Self> {
+        std::fs::create_dir_all(dir).ok();
+        let conn = Connection::open(dir.join("mailclient.db"))?;
+        conn.execute_batch(
+            "
+            CREATE TABLE IF NOT EXISTS accounts (
+                id TEXT PRIMARY KEY,
+                label TEXT NOT NULL,
+                email TEXT NOT NULL,
+                username TEXT NOT NULL,
+                protocol TEXT NOT NULL,
+                incoming_host TEXT NOT NULL,
+                incoming_port INTEGER NOT NULL,
+                smtp_host TEXT NOT NULL,
+                smtp_port INTEGER NOT NULL,
+                smtp_starttls INTEGER NOT NULL
+            );
+            CREATE TABLE IF NOT EXISTS messages (
+                account_id TEXT NOT NULL,
+                folder TEXT NOT NULL,
+                uid INTEGER NOT NULL,
+                from_name TEXT NOT NULL,
+                from_addr TEXT NOT NULL,
+                subject TEXT NOT NULL,
+                date TEXT NOT NULL,
+                timestamp INTEGER NOT NULL,
+                snippet TEXT NOT NULL,
+                is_read INTEGER NOT NULL,
+                has_attachments INTEGER NOT NULL,
+                flagged INTEGER NOT NULL DEFAULT 0,
+                PRIMARY KEY (account_id, folder, uid)
+            );
+            CREATE INDEX IF NOT EXISTS idx_messages_folder ON messages(account_id, folder, timestamp DESC);
+            CREATE TABLE IF NOT EXISTS contacts (
+                id TEXT PRIMARY KEY,
+                name TEXT NOT NULL,
+                email TEXT,
+                phone TEXT,
+                address TEXT,
+                company TEXT,
+                notes TEXT,
+                favorite INTEGER NOT NULL DEFAULT 0,
+                google_account_id TEXT,
+                google_resource_name TEXT
+            );
+            CREATE UNIQUE INDEX IF NOT EXISTS idx_contacts_email ON contacts(email) WHERE email IS NOT NULL;
+            CREATE UNIQUE INDEX IF NOT EXISTS idx_contacts_google_resource_name ON contacts(google_resource_name) WHERE google_resource_name IS NOT NULL;
+            CREATE TABLE IF NOT EXISTS message_bodies (
+                account_id TEXT NOT NULL,
+                folder TEXT NOT NULL,
+                uid INTEGER NOT NULL,
+                raw BLOB NOT NULL,
+                PRIMARY KEY (account_id, folder, uid)
+            );
+            CREATE TABLE IF NOT EXISTS rules (
+                id TEXT PRIMARY KEY,
+                account_id TEXT,
+                field TEXT,
+                contains TEXT,
+                conditions_json TEXT,
+                match_type TEXT NOT NULL DEFAULT 'all',
+                action TEXT NOT NULL,
+                action_value TEXT,
+                enabled INTEGER NOT NULL DEFAULT 1
+            );
+            CREATE TABLE IF NOT EXISTS events (
+                id TEXT PRIMARY KEY,
+                title TEXT NOT NULL,
+                location TEXT,
+                description TEXT,
+                start_ts INTEGER NOT NULL,
+                end_ts INTEGER NOT NULL,
+                all_day INTEGER NOT NULL DEFAULT 0
+            );
+            CREATE INDEX IF NOT EXISTS idx_events_range ON events(start_ts, end_ts);
+            CREATE TABLE IF NOT EXISTS tasks (
+                id TEXT PRIMARY KEY,
+                title TEXT NOT NULL,
+                description TEXT,
+                due_ts INTEGER,
+                priority TEXT NOT NULL DEFAULT 'normal',
+                completed INTEGER NOT NULL DEFAULT 0,
+                created_ts INTEGER NOT NULL,
+                source_account_id TEXT,
+                source_folder TEXT,
+                source_uid INTEGER
+            );
+            CREATE INDEX IF NOT EXISTS idx_tasks_due ON tasks(completed, due_ts);
+            CREATE TABLE IF NOT EXISTS contact_groups (
+                id TEXT PRIMARY KEY,
+                name TEXT NOT NULL,
+                member_ids_json TEXT NOT NULL DEFAULT '[]'
+            );
+            CREATE TABLE IF NOT EXISTS local_folders (
+                name TEXT PRIMARY KEY,
+                created_ts INTEGER NOT NULL DEFAULT 0
+            );
+            CREATE TABLE IF NOT EXISTS vacation_settings (
+                account_id TEXT PRIMARY KEY,
+                enabled INTEGER NOT NULL DEFAULT 0,
+                start_ts INTEGER,
+                end_ts INTEGER,
+                subject TEXT NOT NULL DEFAULT '',
+                body TEXT NOT NULL DEFAULT ''
+            );
+            CREATE TABLE IF NOT EXISTS vacation_replied (
+                account_id TEXT NOT NULL,
+                sender_email TEXT NOT NULL,
+                vacation_start_ts INTEGER NOT NULL,
+                replied_ts INTEGER NOT NULL,
+                PRIMARY KEY (account_id, sender_email, vacation_start_ts)
+            );
+            CREATE TABLE IF NOT EXISTS snoozed_messages (
+                account_id TEXT NOT NULL,
+                folder TEXT NOT NULL,
+                uid INTEGER NOT NULL,
+                until_ts INTEGER NOT NULL,
+                PRIMARY KEY (account_id, folder, uid)
+            );
+            CREATE TABLE IF NOT EXISTS scheduled_sends (
+                id TEXT PRIMARY KEY,
+                account_id TEXT NOT NULL,
+                message_json TEXT NOT NULL,
+                send_at_ts INTEGER NOT NULL
+            );
+            CREATE TABLE IF NOT EXISTS templates (
+                id TEXT PRIMARY KEY,
+                name TEXT NOT NULL,
+                subject TEXT NOT NULL DEFAULT '',
+                body TEXT NOT NULL DEFAULT ''
+            );
+            CREATE TABLE IF NOT EXISTS caldav_accounts (
+                id TEXT PRIMARY KEY,
+                label TEXT NOT NULL,
+                url TEXT NOT NULL,
+                username TEXT NOT NULL
+            );
+            ",
+        )?;
+        conn.execute("ALTER TABLE events ADD COLUMN account_id TEXT", []).ok();
+        conn.execute("ALTER TABLE events ADD COLUMN google_event_id TEXT", []).ok();
+        conn.execute("ALTER TABLE events ADD COLUMN rrule TEXT", []).ok();
+        conn.execute("ALTER TABLE events ADD COLUMN reminder_minutes INTEGER", []).ok();
+        conn.execute("ALTER TABLE events ADD COLUMN category TEXT", []).ok();
+        conn.execute("ALTER TABLE events ADD COLUMN exdates TEXT", []).ok();
+        conn.execute("ALTER TABLE events ADD COLUMN series_id TEXT", []).ok();
+        conn.execute("ALTER TABLE messages ADD COLUMN flagged INTEGER NOT NULL DEFAULT 0", [])
+            .ok();
+        conn.execute("ALTER TABLE messages ADD COLUMN message_id TEXT NOT NULL DEFAULT ''", [])
+            .ok();
+        conn.execute("ALTER TABLE messages ADD COLUMN thread_id TEXT NOT NULL DEFAULT ''", [])
+            .ok();
+        conn.execute("ALTER TABLE messages ADD COLUMN category TEXT", []).ok();
+        conn.execute("ALTER TABLE contacts ADD COLUMN google_account_id TEXT", []).ok();
+        conn.execute("ALTER TABLE contacts ADD COLUMN google_resource_name TEXT", []).ok();
+        // One-time rebuild: contacts.email was NOT NULL UNIQUE, but Google contacts can be
+        // phone/address-only with no email at all. SQLite can't ALTER a column to drop
+        // NOT NULL/UNIQUE, so rebuild the table with a nullable email (partial unique index
+        // instead) plus new phone/address columns. Guarded by checking for the phone column.
+        {
+            let has_phone: bool = conn
+                .query_row(
+                    "SELECT COUNT(*) FROM pragma_table_info('contacts') WHERE name = 'phone'",
+                    [],
+                    |row| row.get::<_, i64>(0),
+                )
+                .map(|n| n > 0)
+                .unwrap_or(true);
+            if !has_phone {
+                conn.execute_batch(
+                    "
+                    BEGIN;
+                    CREATE TABLE contacts_new (
+                        id TEXT PRIMARY KEY,
+                        name TEXT NOT NULL,
+                        email TEXT,
+                        phone TEXT,
+                        address TEXT,
+                        company TEXT,
+                        notes TEXT,
+                        favorite INTEGER NOT NULL DEFAULT 0,
+                        google_account_id TEXT,
+                        google_resource_name TEXT
+                    );
+                    INSERT INTO contacts_new (id, name, email, company, notes, favorite, google_account_id, google_resource_name)
+                        SELECT id, name, NULLIF(email, ''), company, notes, favorite, google_account_id, google_resource_name FROM contacts;
+                    DROP TABLE contacts;
+                    ALTER TABLE contacts_new RENAME TO contacts;
+                    CREATE UNIQUE INDEX idx_contacts_email ON contacts(email) WHERE email IS NOT NULL;
+                    CREATE UNIQUE INDEX idx_contacts_google_resource_name ON contacts(google_resource_name) WHERE google_resource_name IS NOT NULL;
+                    COMMIT;
+                    ",
+                )?;
+            }
+        }
+        conn.execute("ALTER TABLE rules ADD COLUMN conditions_json TEXT", []).ok();
+        conn.execute("ALTER TABLE rules ADD COLUMN match_type TEXT NOT NULL DEFAULT 'all'", [])
+            .ok();
+        // Migrate legacy single-condition rules (field/contains columns) into conditions_json.
+        {
+            let mut stmt = conn
+                .prepare("SELECT id, field, contains FROM rules WHERE conditions_json IS NULL")
+                .ok();
+            if let Some(stmt) = stmt.as_mut() {
+                let legacy: Vec<(String, String, String)> = stmt
+                    .query_map([], |row| Ok((row.get(0)?, row.get(1)?, row.get(2)?)))
+                    .map(|rows| rows.filter_map(|r| r.ok()).collect())
+                    .unwrap_or_default();
+                for (id, field, contains) in legacy {
+                    let json = serde_json::json!([{ "field": field, "contains": contains }]).to_string();
+                    conn.execute("UPDATE rules SET conditions_json = ?1 WHERE id = ?2", params![json, id]).ok();
+                }
+            }
+        }
+        conn.execute(
+            "ALTER TABLE accounts ADD COLUMN auth_method TEXT NOT NULL DEFAULT 'password'",
+            [],
+        )
+        .ok();
+        conn.execute(
+            "INSERT OR IGNORE INTO accounts
+             (id, label, email, username, protocol, incoming_host, incoming_port, smtp_host, smtp_port, smtp_starttls)
+             VALUES ('local', 'Lokale Ablage', '', '', 'local', '', 0, '', 0, 0)",
+            [],
+        )?;
+        Ok(Db(Mutex::new(conn)))
+    }
+
+    pub const LOCAL_ACCOUNT_ID: &'static str = "local";
+    pub const LOCAL_FOLDER: &'static str = "Importiert";
+    pub const DRAFTS_FOLDER: &'static str = "Entwürfe";
+
+    pub fn save_account(&self, a: &Account) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "INSERT OR REPLACE INTO accounts
+             (id, label, email, username, protocol, incoming_host, incoming_port, smtp_host, smtp_port, smtp_starttls, auth_method)
+             VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11)",
+            params![
+                a.id,
+                a.label,
+                a.email,
+                a.username,
+                match a.protocol { Protocol::Imap => "imap", Protocol::Pop3 => "pop3", Protocol::Local => "local" },
+                a.incoming_host,
+                a.incoming_port,
+                a.smtp_host,
+                a.smtp_port,
+                a.smtp_starttls as i32,
+                match a.auth_method { AuthMethod::Password => "password", AuthMethod::GoogleOauth => "google_oauth" },
+            ],
+        )?;
+        Ok(())
+    }
+
+    pub fn list_accounts(&self) -> AppResult<Vec<Account>> {
+        let conn = self.0.lock().unwrap();
+        let mut stmt = conn.prepare(
+            "SELECT id, label, email, username, protocol, incoming_host, incoming_port, smtp_host, smtp_port, smtp_starttls, auth_method FROM accounts",
+        )?;
+        let rows = stmt.query_map([], |row| {
+            let proto: String = row.get(4)?;
+            let auth: String = row.get(10)?;
+            Ok(Account {
+                id: row.get(0)?,
+                label: row.get(1)?,
+                email: row.get(2)?,
+                username: row.get(3)?,
+                protocol: match proto.as_str() {
+                    "pop3" => Protocol::Pop3,
+                    "local" => Protocol::Local,
+                    _ => Protocol::Imap,
+                },
+                incoming_host: row.get(5)?,
+                incoming_port: row.get(6)?,
+                smtp_host: row.get(7)?,
+                smtp_port: row.get(8)?,
+                smtp_starttls: row.get::<_, i32>(9)? != 0,
+                auth_method: match auth.as_str() {
+                    "google_oauth" => AuthMethod::GoogleOauth,
+                    _ => AuthMethod::Password,
+                },
+            })
+        })?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    pub fn delete_account(&self, id: &str) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute("DELETE FROM accounts WHERE id = ?1", params![id])?;
+        conn.execute("DELETE FROM messages WHERE account_id = ?1", params![id])?;
+        Ok(())
+    }
+
+    fn row_to_caldav_account(row: &rusqlite::Row) -> rusqlite::Result<crate::models::CaldavAccount> {
+        Ok(crate::models::CaldavAccount { id: row.get(0)?, label: row.get(1)?, url: row.get(2)?, username: row.get(3)? })
+    }
+
+    pub fn list_caldav_accounts(&self) -> AppResult<Vec<crate::models::CaldavAccount>> {
+        let conn = self.0.lock().unwrap();
+        let mut stmt = conn.prepare("SELECT id, label, url, username FROM caldav_accounts ORDER BY label COLLATE NOCASE ASC")?;
+        let rows = stmt.query_map([], Self::row_to_caldav_account)?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    pub fn get_caldav_account(&self, id: &str) -> AppResult<crate::models::CaldavAccount> {
+        let conn = self.0.lock().unwrap();
+        conn.query_row(
+            "SELECT id, label, url, username FROM caldav_accounts WHERE id = ?1",
+            params![id],
+            Self::row_to_caldav_account,
+        )
+        .map_err(|e| e.into())
+    }
+
+    pub fn create_caldav_account(&self, id: &str, label: &str, url: &str, username: &str) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "INSERT INTO caldav_accounts (id, label, url, username) VALUES (?1, ?2, ?3, ?4)",
+            params![id, label, url, username],
+        )?;
+        Ok(())
+    }
+
+    pub fn delete_caldav_account(&self, id: &str) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute("DELETE FROM caldav_accounts WHERE id = ?1", params![id])?;
+        conn.execute("DELETE FROM events WHERE account_id = ?1", params![id])?;
+        Ok(())
+    }
+
+    /// Upserts freshly-fetched messages. Deliberately leaves `category` untouched
+    /// on conflict — it's a purely local annotation the server knows nothing about,
+    /// so a resync must not wipe it.
+    pub fn upsert_messages(&self, msgs: &[MessageSummary]) -> AppResult<()> {
+        let mut conn = self.0.lock().unwrap();
+        let tx = conn.transaction()?;
+        for m in msgs {
+            tx.execute(
+                "INSERT INTO messages
+                 (account_id, folder, uid, from_name, from_addr, subject, date, timestamp, snippet, is_read, has_attachments, flagged, message_id, thread_id)
+                 VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13, ?14)
+                 ON CONFLICT(account_id, folder, uid) DO UPDATE SET
+                   from_name=excluded.from_name, from_addr=excluded.from_addr, subject=excluded.subject,
+                   date=excluded.date, timestamp=excluded.timestamp, snippet=excluded.snippet,
+                   is_read=excluded.is_read, has_attachments=excluded.has_attachments, flagged=excluded.flagged,
+                   message_id=excluded.message_id, thread_id=excluded.thread_id",
+                params![
+                    m.account_id, m.folder, m.uid, m.from_name, m.from_addr,
+                    m.subject, m.date, m.timestamp, m.snippet,
+                    m.is_read as i32, m.has_attachments as i32, m.flagged as i32,
+                    m.message_id, m.thread_id,
+                ],
+            )?;
+        }
+        tx.commit()?;
+        Ok(())
+    }
+
+    fn row_to_message(row: &rusqlite::Row) -> rusqlite::Result<MessageSummary> {
+        Ok(MessageSummary {
+            uid: row.get(0)?,
+            account_id: row.get(1)?,
+            folder: row.get(2)?,
+            from_name: row.get(3)?,
+            from_addr: row.get(4)?,
+            subject: row.get(5)?,
+            date: row.get(6)?,
+            timestamp: row.get(7)?,
+            snippet: row.get(8)?,
+            is_read: row.get::<_, i32>(9)? != 0,
+            has_attachments: row.get::<_, i32>(10)? != 0,
+            flagged: row.get::<_, i32>(11)? != 0,
+            message_id: row.get(12)?,
+            thread_id: row.get(13)?,
+            category: row.get(14)?,
+        })
+    }
+
+    const MESSAGE_COLUMNS: &'static str =
+        "uid, account_id, folder, from_name, from_addr, subject, date, timestamp, snippet, is_read, has_attachments, flagged, message_id, thread_id, category";
+
+    pub fn list_messages(&self, account_id: &str, folder: &str) -> AppResult<Vec<MessageSummary>> {
+        let conn = self.0.lock().unwrap();
+        let mut stmt = conn.prepare(&format!(
+            "SELECT {} FROM messages WHERE account_id = ?1 AND folder = ?2 ORDER BY timestamp DESC LIMIT 200",
+            Self::MESSAGE_COLUMNS
+        ))?;
+        let rows = stmt.query_map(params![account_id, folder], Self::row_to_message)?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    /// Like `list_messages`, but excludes currently-snoozed messages ("Wiedervorlage") —
+    /// used for the folder views the user actually sees. `list_messages` itself stays
+    /// unfiltered since it also serves as the "what's already cached" ground truth for
+    /// sync/rules/vacation-autoreply logic, which must still see snoozed messages.
+    pub fn list_visible_messages(&self, account_id: &str, folder: &str) -> AppResult<Vec<MessageSummary>> {
+        let conn = self.0.lock().unwrap();
+        let now = chrono::Utc::now().timestamp();
+        let sql = format!(
+            "SELECT {} FROM messages m
+             WHERE account_id = ?1 AND folder = ?2
+               AND NOT EXISTS (
+                 SELECT 1 FROM snoozed_messages s
+                 WHERE s.account_id = m.account_id AND s.folder = m.folder AND s.uid = m.uid AND s.until_ts > ?3
+               )
+             ORDER BY timestamp DESC LIMIT 200",
+            Self::MESSAGE_COLUMNS
+        );
+        let mut stmt = conn.prepare(&sql)?;
+        let rows = stmt.query_map(params![account_id, folder, now], Self::row_to_message)?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    pub fn save_scheduled_send(&self, id: &str, account_id: &str, message_json: &str, send_at_ts: i64) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "INSERT INTO scheduled_sends (id, account_id, message_json, send_at_ts) VALUES (?1, ?2, ?3, ?4)",
+            params![id, account_id, message_json, send_at_ts],
+        )?;
+        Ok(())
+    }
+
+    pub fn delete_scheduled_send(&self, id: &str) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute("DELETE FROM scheduled_sends WHERE id = ?1", params![id])?;
+        Ok(())
+    }
+
+    /// (id, message_json, send_at_ts) for every still-pending scheduled send — used to
+    /// re-arm timers on app startup, since the in-memory `PendingSends` registry and
+    /// spawned `tokio::time::sleep` timers don't survive a restart on their own.
+    pub fn list_scheduled_sends(&self) -> AppResult<Vec<(String, String, i64)>> {
+        let conn = self.0.lock().unwrap();
+        let mut stmt = conn.prepare("SELECT id, message_json, send_at_ts FROM scheduled_sends")?;
+        let rows = stmt.query_map([], |row| Ok((row.get(0)?, row.get(1)?, row.get(2)?)))?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    fn row_to_template(row: &rusqlite::Row) -> rusqlite::Result<crate::models::Template> {
+        Ok(crate::models::Template { id: row.get(0)?, name: row.get(1)?, subject: row.get(2)?, body: row.get(3)? })
+    }
+
+    pub fn list_templates(&self) -> AppResult<Vec<crate::models::Template>> {
+        let conn = self.0.lock().unwrap();
+        let mut stmt = conn.prepare("SELECT id, name, subject, body FROM templates ORDER BY name COLLATE NOCASE ASC")?;
+        let rows = stmt.query_map([], Self::row_to_template)?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    pub fn create_template(&self, new: &crate::models::NewTemplate) -> AppResult<crate::models::Template> {
+        let conn = self.0.lock().unwrap();
+        let id = Uuid::new_v4().to_string();
+        conn.execute(
+            "INSERT INTO templates (id, name, subject, body) VALUES (?1, ?2, ?3, ?4)",
+            params![id, new.name, new.subject, new.body],
+        )?;
+        Ok(crate::models::Template { id, name: new.name.clone(), subject: new.subject.clone(), body: new.body.clone() })
+    }
+
+    pub fn update_template(&self, t: &crate::models::Template) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "UPDATE templates SET name = ?1, subject = ?2, body = ?3 WHERE id = ?4",
+            params![t.name, t.subject, t.body, t.id],
+        )?;
+        Ok(())
+    }
+
+    pub fn delete_template(&self, id: &str) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute("DELETE FROM templates WHERE id = ?1", params![id])?;
+        Ok(())
+    }
+
+    pub fn snooze_message(&self, account_id: &str, folder: &str, uid: u32, until_ts: i64) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "INSERT INTO snoozed_messages (account_id, folder, uid, until_ts) VALUES (?1, ?2, ?3, ?4)
+             ON CONFLICT(account_id, folder, uid) DO UPDATE SET until_ts = excluded.until_ts",
+            params![account_id, folder, uid, until_ts],
+        )?;
+        Ok(())
+    }
+
+    pub fn unsnooze_message(&self, account_id: &str, folder: &str, uid: u32) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "DELETE FROM snoozed_messages WHERE account_id = ?1 AND folder = ?2 AND uid = ?3",
+            params![account_id, folder, uid],
+        )?;
+        Ok(())
+    }
+
+    /// All currently-snoozed messages (still in the future) across every account, with
+    /// their message data joined in, newest-snoozed-until first.
+    pub fn list_snoozed_messages(&self) -> AppResult<Vec<crate::models::SnoozedMessage>> {
+        let conn = self.0.lock().unwrap();
+        let now = chrono::Utc::now().timestamp();
+        let sql = "SELECT m.uid, m.account_id, m.folder, from_name, from_addr, subject, date, timestamp, snippet, \
+                    is_read, has_attachments, flagged, message_id, thread_id, category, s.until_ts
+             FROM messages m
+             JOIN snoozed_messages s ON s.account_id = m.account_id AND s.folder = m.folder AND s.uid = m.uid
+             WHERE s.until_ts > ?1
+             ORDER BY s.until_ts ASC";
+        let mut stmt = conn.prepare(sql)?;
+        let rows = stmt.query_map(params![now], |row| {
+            Ok(crate::models::SnoozedMessage {
+                message: Self::row_to_message(row)?,
+                until_ts: row.get(15)?,
+            })
+        })?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    pub fn search_messages(&self, account_id: &str, query: &str) -> AppResult<Vec<MessageSummary>> {
+        let conn = self.0.lock().unwrap();
+        let mut stmt = conn.prepare(&format!(
+            "SELECT {} FROM messages
+             WHERE account_id = ?1
+               AND (subject LIKE ?2 ESCAPE '\\' OR from_name LIKE ?2 ESCAPE '\\' OR from_addr LIKE ?2 ESCAPE '\\' OR snippet LIKE ?2 ESCAPE '\\')
+             ORDER BY timestamp DESC LIMIT 200",
+            Self::MESSAGE_COLUMNS
+        ))?;
+        let escaped = query.replace('\\', "\\\\").replace('%', "\\%").replace('_', "\\_");
+        let pattern = format!("%{escaped}%");
+        let rows = stmt.query_map(params![account_id, pattern], Self::row_to_message)?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    pub fn search_all_messages(&self, query: &str) -> AppResult<Vec<MessageSummary>> {
+        let conn = self.0.lock().unwrap();
+        let mut stmt = conn.prepare(&format!(
+            "SELECT {} FROM messages
+             WHERE subject LIKE ?1 ESCAPE '\\' OR from_name LIKE ?1 ESCAPE '\\' OR from_addr LIKE ?1 ESCAPE '\\' OR snippet LIKE ?1 ESCAPE '\\'
+             ORDER BY timestamp DESC LIMIT 300",
+            Self::MESSAGE_COLUMNS
+        ))?;
+        let escaped = query.replace('\\', "\\\\").replace('%', "\\%").replace('_', "\\_");
+        let pattern = format!("%{escaped}%");
+        let rows = stmt.query_map(params![pattern], Self::row_to_message)?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    /// Global search with optional filters (all combined with AND). `query` alone
+    /// still matches subject/from/snippet like the plain search; `from` narrows to
+    /// sender only; `date_from`/`date_to` are inclusive unix-timestamp bounds;
+    /// `has_attachment` when true requires an attachment.
+    pub fn search_all_messages_advanced(
+        &self,
+        query: &str,
+        from: Option<&str>,
+        date_from: Option<i64>,
+        date_to: Option<i64>,
+        has_attachment: bool,
+    ) -> AppResult<Vec<MessageSummary>> {
+        let conn = self.0.lock().unwrap();
+        let mut clauses: Vec<String> = Vec::new();
+        let mut owned_params: Vec<Box<dyn rusqlite::types::ToSql>> = Vec::new();
+
+        let q = query.trim();
+        if !q.is_empty() {
+            let escaped = q.replace('\\', "\\\\").replace('%', "\\%").replace('_', "\\_");
+            let pattern = format!("%{escaped}%");
+            clauses.push(
+                "(subject LIKE ? ESCAPE '\\' OR from_name LIKE ? ESCAPE '\\' OR from_addr LIKE ? ESCAPE '\\' OR snippet LIKE ? ESCAPE '\\')"
+                    .to_string(),
+            );
+            for _ in 0..4 {
+                owned_params.push(Box::new(pattern.clone()));
+            }
+        }
+        if let Some(f) = from.map(str::trim).filter(|s| !s.is_empty()) {
+            let escaped = f.replace('\\', "\\\\").replace('%', "\\%").replace('_', "\\_");
+            let pattern = format!("%{escaped}%");
+            clauses.push("(from_addr LIKE ? ESCAPE '\\' OR from_name LIKE ? ESCAPE '\\')".to_string());
+            owned_params.push(Box::new(pattern.clone()));
+            owned_params.push(Box::new(pattern));
+        }
+        if let Some(d) = date_from {
+            clauses.push("timestamp >= ?".to_string());
+            owned_params.push(Box::new(d));
+        }
+        if let Some(d) = date_to {
+            clauses.push("timestamp <= ?".to_string());
+            owned_params.push(Box::new(d));
+        }
+        if has_attachment {
+            clauses.push("has_attachments = 1".to_string());
+        }
+
+        let where_sql = if clauses.is_empty() { "1=1".to_string() } else { clauses.join(" AND ") };
+        let sql = format!(
+            "SELECT {} FROM messages WHERE {} ORDER BY timestamp DESC LIMIT 300",
+            Self::MESSAGE_COLUMNS,
+            where_sql
+        );
+        let mut stmt = conn.prepare(&sql)?;
+        let param_refs: Vec<&dyn rusqlite::types::ToSql> = owned_params.iter().map(|b| b.as_ref()).collect();
+        let rows = stmt.query_map(param_refs.as_slice(), Self::row_to_message)?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    pub fn set_message_category(&self, account_id: &str, folder: &str, uid: u32, category: Option<&str>) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "UPDATE messages SET category = ?1 WHERE account_id = ?2 AND folder = ?3 AND uid = ?4",
+            params![category, account_id, folder, uid],
+        )?;
+        Ok(())
+    }
+
+    pub fn set_read(&self, account_id: &str, folder: &str, uid: u32, is_read: bool) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "UPDATE messages SET is_read = ?1 WHERE account_id = ?2 AND folder = ?3 AND uid = ?4",
+            params![is_read as i32, account_id, folder, uid],
+        )?;
+        Ok(())
+    }
+
+    pub fn set_flagged(&self, account_id: &str, folder: &str, uid: u32, flagged: bool) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "UPDATE messages SET flagged = ?1 WHERE account_id = ?2 AND folder = ?3 AND uid = ?4",
+            params![flagged as i32, account_id, folder, uid],
+        )?;
+        Ok(())
+    }
+
+    pub fn delete_message(&self, account_id: &str, folder: &str, uid: u32) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "DELETE FROM messages WHERE account_id = ?1 AND folder = ?2 AND uid = ?3",
+            params![account_id, folder, uid],
+        )?;
+        Ok(())
+    }
+
+    fn row_to_contact(row: &rusqlite::Row) -> rusqlite::Result<Contact> {
+        Ok(Contact {
+            id: row.get(0)?,
+            name: row.get(1)?,
+            email: row.get(2)?,
+            phone: row.get(3)?,
+            address: row.get(4)?,
+            company: row.get(5)?,
+            notes: row.get(6)?,
+            favorite: row.get::<_, i32>(7)? != 0,
+            google_account_id: row.get(8)?,
+            google_resource_name: row.get(9)?,
+        })
+    }
+
+    const CONTACT_COLUMNS: &'static str =
+        "id, name, email, phone, address, company, notes, favorite, google_account_id, google_resource_name";
+
+    pub fn list_contacts(&self) -> AppResult<Vec<Contact>> {
+        let conn = self.0.lock().unwrap();
+        let mut stmt = conn.prepare(&format!(
+            "SELECT {} FROM contacts ORDER BY favorite DESC, name COLLATE NOCASE ASC",
+            Self::CONTACT_COLUMNS
+        ))?;
+        let rows = stmt.query_map([], Self::row_to_contact)?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    pub fn search_contacts(&self, query: &str, limit: u32) -> AppResult<Vec<Contact>> {
+        let conn = self.0.lock().unwrap();
+        let mut stmt = conn.prepare(&format!(
+            "SELECT {} FROM contacts
+             WHERE name LIKE ?1 ESCAPE '\\' OR email LIKE ?1 ESCAPE '\\' OR phone LIKE ?1 ESCAPE '\\'
+             ORDER BY favorite DESC, name COLLATE NOCASE ASC LIMIT ?2",
+            Self::CONTACT_COLUMNS
+        ))?;
+        let escaped = query.replace('\\', "\\\\").replace('%', "\\%").replace('_', "\\_");
+        let pattern = format!("%{escaped}%");
+        let rows = stmt.query_map(params![pattern, limit], Self::row_to_contact)?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    pub fn create_contact(&self, new: NewContact) -> AppResult<Contact> {
+        let conn = self.0.lock().unwrap();
+        let id = Uuid::new_v4().to_string();
+        let email = new.email.as_deref().map(str::trim).filter(|e| !e.is_empty());
+        conn.execute(
+            "INSERT INTO contacts (id, name, email, phone, address, company, notes, favorite) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, 0)",
+            params![id, new.name, email, new.phone, new.address, new.company, new.notes],
+        )?;
+        Ok(Contact {
+            id,
+            name: new.name,
+            email: email.map(str::to_string),
+            phone: new.phone,
+            address: new.address,
+            company: new.company,
+            notes: new.notes,
+            favorite: false,
+            google_account_id: None,
+            google_resource_name: None,
+        })
+    }
+
+    pub fn get_contact(&self, id: &str) -> AppResult<Contact> {
+        let conn = self.0.lock().unwrap();
+        let sql = format!("SELECT {} FROM contacts WHERE id = ?1", Self::CONTACT_COLUMNS);
+        conn.query_row(&sql, params![id], Self::row_to_contact).map_err(|e| e.into())
+    }
+
+    pub fn update_contact(&self, contact: &Contact) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        let email = contact.email.as_deref().map(str::trim).filter(|e| !e.is_empty());
+        conn.execute(
+            "UPDATE contacts SET name = ?1, email = ?2, phone = ?3, address = ?4, company = ?5, notes = ?6, favorite = ?7 WHERE id = ?8",
+            params![
+                contact.name,
+                email,
+                contact.phone,
+                contact.address,
+                contact.company,
+                contact.notes,
+                contact.favorite as i32,
+                contact.id,
+            ],
+        )?;
+        Ok(())
+    }
+
+    pub fn delete_contact(&self, id: &str) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute("DELETE FROM contacts WHERE id = ?1", params![id])?;
+        Ok(())
+    }
+
+    pub fn set_contact_favorite(&self, id: &str, favorite: bool) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "UPDATE contacts SET favorite = ?1 WHERE id = ?2",
+            params![favorite as i32, id],
+        )?;
+        Ok(())
+    }
+
+    pub fn next_local_uid(&self, folder: &str) -> AppResult<u32> {
+        let conn = self.0.lock().unwrap();
+        let max: Option<u32> = conn.query_row(
+            "SELECT MAX(uid) FROM messages WHERE account_id = ?1 AND folder = ?2",
+            params![Self::LOCAL_ACCOUNT_ID, folder],
+            |row| row.get(0),
+        )?;
+        Ok(max.unwrap_or(0) + 1)
+    }
+
+    pub fn save_local_body(&self, folder: &str, uid: u32, raw: &[u8]) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "INSERT OR REPLACE INTO message_bodies (account_id, folder, uid, raw) VALUES (?1, ?2, ?3, ?4)",
+            params![Self::LOCAL_ACCOUNT_ID, folder, uid, raw],
+        )?;
+        Ok(())
+    }
+
+    pub fn get_local_body(&self, folder: &str, uid: u32) -> AppResult<Vec<u8>> {
+        let conn = self.0.lock().unwrap();
+        conn.query_row(
+            "SELECT raw FROM message_bodies WHERE account_id = ?1 AND folder = ?2 AND uid = ?3",
+            params![Self::LOCAL_ACCOUNT_ID, folder, uid],
+            |row| row.get(0),
+        )
+        .map_err(|e| e.into())
+    }
+
+    pub fn delete_local_body(&self, folder: &str, uid: u32) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "DELETE FROM message_bodies WHERE account_id = ?1 AND folder = ?2 AND uid = ?3",
+            params![Self::LOCAL_ACCOUNT_ID, folder, uid],
+        )?;
+        Ok(())
+    }
+
+    pub fn list_local_folders(&self) -> AppResult<Vec<String>> {
+        let conn = self.0.lock().unwrap();
+        let mut stmt = conn.prepare("SELECT name FROM local_folders ORDER BY name COLLATE NOCASE ASC")?;
+        let rows = stmt.query_map([], |row| row.get::<_, String>(0))?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    pub fn create_local_folder(&self, name: &str) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "INSERT OR IGNORE INTO local_folders (name, created_ts) VALUES (?1, ?2)",
+            params![name, chrono::Utc::now().timestamp()],
+        )?;
+        Ok(())
+    }
+
+    pub fn rename_local_folder(&self, from: &str, to: &str) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute("UPDATE local_folders SET name = ?1 WHERE name = ?2", params![to, from])?;
+        conn.execute(
+            "UPDATE messages SET folder = ?1 WHERE account_id = ?2 AND folder = ?3",
+            params![to, Self::LOCAL_ACCOUNT_ID, from],
+        )?;
+        conn.execute(
+            "UPDATE message_bodies SET folder = ?1 WHERE account_id = ?2 AND folder = ?3",
+            params![to, Self::LOCAL_ACCOUNT_ID, from],
+        )?;
+        Ok(())
+    }
+
+    pub fn delete_local_folder(&self, name: &str) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "DELETE FROM messages WHERE account_id = ?1 AND folder = ?2",
+            params![Self::LOCAL_ACCOUNT_ID, name],
+        )?;
+        conn.execute(
+            "DELETE FROM message_bodies WHERE account_id = ?1 AND folder = ?2",
+            params![Self::LOCAL_ACCOUNT_ID, name],
+        )?;
+        conn.execute("DELETE FROM local_folders WHERE name = ?1", params![name])?;
+        Ok(())
+    }
+
+    pub fn get_vacation_settings(&self, account_id: &str) -> AppResult<Option<VacationSettings>> {
+        let conn = self.0.lock().unwrap();
+        conn.query_row(
+            "SELECT account_id, enabled, start_ts, end_ts, subject, body FROM vacation_settings WHERE account_id = ?1",
+            params![account_id],
+            |row| {
+                Ok(VacationSettings {
+                    account_id: row.get(0)?,
+                    enabled: row.get::<_, i32>(1)? != 0,
+                    start_ts: row.get(2)?,
+                    end_ts: row.get(3)?,
+                    subject: row.get(4)?,
+                    body: row.get(5)?,
+                })
+            },
+        )
+        .optional()
+        .map_err(|e| e.into())
+    }
+
+    pub fn save_vacation_settings(&self, account_id: &str, s: &NewVacationSettings) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "INSERT INTO vacation_settings (account_id, enabled, start_ts, end_ts, subject, body)
+             VALUES (?1, ?2, ?3, ?4, ?5, ?6)
+             ON CONFLICT(account_id) DO UPDATE SET
+                enabled = excluded.enabled,
+                start_ts = excluded.start_ts,
+                end_ts = excluded.end_ts,
+                subject = excluded.subject,
+                body = excluded.body",
+            params![account_id, s.enabled as i32, s.start_ts, s.end_ts, s.subject, s.body],
+        )?;
+        Ok(())
+    }
+
+    pub fn has_vacation_replied(&self, account_id: &str, sender: &str, vacation_start_ts: i64) -> AppResult<bool> {
+        let conn = self.0.lock().unwrap();
+        let count: i64 = conn.query_row(
+            "SELECT COUNT(*) FROM vacation_replied WHERE account_id = ?1 AND sender_email = ?2 AND vacation_start_ts = ?3",
+            params![account_id, sender, vacation_start_ts],
+            |row| row.get(0),
+        )?;
+        Ok(count > 0)
+    }
+
+    pub fn mark_vacation_replied(&self, account_id: &str, sender: &str, vacation_start_ts: i64) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "INSERT OR IGNORE INTO vacation_replied (account_id, sender_email, vacation_start_ts, replied_ts) VALUES (?1, ?2, ?3, ?4)",
+            params![account_id, sender, vacation_start_ts, chrono::Utc::now().timestamp()],
+        )?;
+        Ok(())
+    }
+
+    pub fn upsert_contact(
+        &self,
+        name: &str,
+        email: &str,
+        company: Option<&str>,
+        notes: Option<&str>,
+    ) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "INSERT INTO contacts (id, name, email, company, notes, favorite) VALUES (?1, ?2, ?3, ?4, ?5, 0)
+             ON CONFLICT(email) DO UPDATE SET
+                name = excluded.name,
+                company = COALESCE(NULLIF(excluded.company, ''), contacts.company),
+                notes = COALESCE(NULLIF(excluded.notes, ''), contacts.notes)",
+            params![Uuid::new_v4().to_string(), name, email, company, notes],
+        )?;
+        Ok(())
+    }
+
+    /// Upserts a contact fetched from the Google People API. Unlike `upsert_contact`,
+    /// email may be absent (phone/address-only Google contacts are common), so this
+    /// can't dedup by `ON CONFLICT(email)` alone — it first tries to match an existing
+    /// row by `google_resource_name` (repeat syncs of the same person), then falls back
+    /// to matching by email (merging into a contact already harvested from mail), and
+    /// only inserts a new row if neither matches.
+    pub fn upsert_google_contact(
+        &self,
+        name: &str,
+        email: Option<&str>,
+        phone: Option<&str>,
+        address: Option<&str>,
+        company: Option<&str>,
+        account_id: &str,
+        resource_name: &str,
+    ) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        let email = email.map(str::trim).filter(|e| !e.is_empty());
+
+        let mut existing_id: Option<String> = conn
+            .query_row(
+                "SELECT id FROM contacts WHERE google_resource_name = ?1",
+                params![resource_name],
+                |row| row.get(0),
+            )
+            .optional()?;
+        if existing_id.is_none() {
+            if let Some(e) = email {
+                existing_id = conn
+                    .query_row("SELECT id FROM contacts WHERE email = ?1", params![e], |row| row.get(0))
+                    .optional()?;
+            }
+        }
+
+        match existing_id {
+            Some(id) => {
+                conn.execute(
+                    "UPDATE contacts SET
+                        name = ?1,
+                        email = COALESCE(?2, email),
+                        phone = COALESCE(?3, phone),
+                        address = COALESCE(?4, address),
+                        company = COALESCE(NULLIF(?5, ''), company),
+                        google_account_id = ?6,
+                        google_resource_name = ?7
+                     WHERE id = ?8",
+                    params![name, email, phone, address, company, account_id, resource_name, id],
+                )?;
+            }
+            None => {
+                conn.execute(
+                    "INSERT INTO contacts (id, name, email, phone, address, company, notes, favorite, google_account_id, google_resource_name)
+                     VALUES (?1, ?2, ?3, ?4, ?5, ?6, NULL, 0, ?7, ?8)",
+                    params![Uuid::new_v4().to_string(), name, email, phone, address, company, account_id, resource_name],
+                )?;
+            }
+        }
+        Ok(())
+    }
+
+    pub fn touch_contact(&self, name: &str, email: &str) -> AppResult<()> {
+        let email = email.trim();
+        if email.is_empty() || !email.contains('@') {
+            return Ok(());
+        }
+        let name = if name.trim().is_empty() { email } else { name.trim() };
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "INSERT INTO contacts (id, name, email, favorite) VALUES (?1, ?2, ?3, 0)
+             ON CONFLICT(email) DO NOTHING",
+            params![Uuid::new_v4().to_string(), name, email],
+        )?;
+        Ok(())
+    }
+
+    const RULE_COLUMNS: &'static str = "id, account_id, conditions_json, match_type, action, action_value, enabled";
+
+    pub fn list_rules(&self) -> AppResult<Vec<Rule>> {
+        let conn = self.0.lock().unwrap();
+        let mut stmt = conn.prepare(&format!("SELECT {} FROM rules ORDER BY rowid", Self::RULE_COLUMNS))?;
+        let rows = stmt.query_map([], Self::row_to_rule)?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    pub fn list_rules_for_account(&self, account_id: &str) -> AppResult<Vec<Rule>> {
+        let conn = self.0.lock().unwrap();
+        let mut stmt = conn.prepare(&format!(
+            "SELECT {} FROM rules WHERE enabled = 1 AND (account_id IS NULL OR account_id = ?1) ORDER BY rowid",
+            Self::RULE_COLUMNS
+        ))?;
+        let rows = stmt.query_map(params![account_id], Self::row_to_rule)?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    fn row_to_rule(row: &rusqlite::Row) -> rusqlite::Result<Rule> {
+        let action: String = row.get(4)?;
+        let conditions_json: Option<String> = row.get(2)?;
+        let match_type: String = row.get(3)?;
+        let conditions = conditions_json
+            .and_then(|j| serde_json::from_str(&j).ok())
+            .unwrap_or_default();
+        Ok(Rule {
+            id: row.get(0)?,
+            account_id: row.get(1)?,
+            conditions,
+            match_type: if match_type == "any" { crate::models::MatchType::Any } else { crate::models::MatchType::All },
+            action: match action.as_str() {
+                "mark_read" => RuleAction::MarkRead,
+                "flag" => RuleAction::Flag,
+                "delete" => RuleAction::Delete,
+                _ => RuleAction::MoveTo,
+            },
+            action_value: row.get(5)?,
+            enabled: row.get::<_, i32>(6)? != 0,
+        })
+    }
+
+    fn rule_action_str(a: RuleAction) -> &'static str {
+        match a {
+            RuleAction::MoveTo => "move_to",
+            RuleAction::MarkRead => "mark_read",
+            RuleAction::Flag => "flag",
+            RuleAction::Delete => "delete",
+        }
+    }
+
+    pub fn create_rule(&self, new: NewRule) -> AppResult<Rule> {
+        let id = Uuid::new_v4().to_string();
+        let conditions_json = serde_json::to_string(&new.conditions).unwrap_or_else(|_| "[]".to_string());
+        let match_type_str = match new.match_type {
+            crate::models::MatchType::All => "all",
+            crate::models::MatchType::Any => "any",
+        };
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "INSERT INTO rules (id, account_id, conditions_json, match_type, action, action_value, enabled)
+             VALUES (?1, ?2, ?3, ?4, ?5, ?6, 1)",
+            params![
+                id,
+                new.account_id,
+                conditions_json,
+                match_type_str,
+                Self::rule_action_str(new.action),
+                new.action_value,
+            ],
+        )?;
+        Ok(Rule {
+            id,
+            account_id: new.account_id,
+            conditions: new.conditions,
+            match_type: new.match_type,
+            action: new.action,
+            action_value: new.action_value,
+            enabled: true,
+        })
+    }
+
+    pub fn set_rule_enabled(&self, id: &str, enabled: bool) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "UPDATE rules SET enabled = ?1 WHERE id = ?2",
+            params![enabled as i32, id],
+        )?;
+        Ok(())
+    }
+
+    pub fn delete_rule(&self, id: &str) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute("DELETE FROM rules WHERE id = ?1", params![id])?;
+        Ok(())
+    }
+
+    fn row_to_event(row: &rusqlite::Row) -> rusqlite::Result<Event> {
+        let id: String = row.get(0)?;
+        Ok(Event {
+            base_id: id.clone(),
+            id,
+            title: row.get(1)?,
+            location: row.get(2)?,
+            description: row.get(3)?,
+            start_ts: row.get(4)?,
+            end_ts: row.get(5)?,
+            all_day: row.get::<_, i32>(6)? != 0,
+            account_id: row.get(7)?,
+            google_event_id: row.get(8)?,
+            rrule: row.get(9)?,
+            reminder_minutes: row.get(10)?,
+            category: row.get(11)?,
+            exdates: row.get(12)?,
+            series_id: row.get(13)?,
+        })
+    }
+
+    const EVENT_COLUMNS: &'static str = "id, title, location, description, start_ts, end_ts, all_day, account_id, \
+         google_event_id, rrule, reminder_minutes, category, exdates, series_id";
+
+    pub fn add_event_exdate(&self, base_id: &str, occurrence_start: i64) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        let existing: Option<String> = conn
+            .query_row("SELECT exdates FROM events WHERE id = ?1", params![base_id], |r| r.get::<_, Option<String>>(0))
+            .optional()?
+            .flatten();
+        let ts_str = occurrence_start.to_string();
+        let mut list: Vec<String> = existing
+            .map(|s| s.split(',').filter(|x| !x.is_empty()).map(str::to_string).collect())
+            .unwrap_or_default();
+        if !list.contains(&ts_str) {
+            list.push(ts_str);
+        }
+        conn.execute("UPDATE events SET exdates = ?1 WHERE id = ?2", params![list.join(","), base_id])?;
+        Ok(())
+    }
+
+    pub fn set_event_series_id(&self, id: &str, series_id: &str) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute("UPDATE events SET series_id = ?1 WHERE id = ?2", params![series_id, id])?;
+        Ok(())
+    }
+
+    /// Returns every event overlapping the range, plus every recurring series
+    /// master regardless of its own stored range (the caller expands occurrences).
+    pub fn list_events_in_range(&self, start_ts: i64, end_ts: i64) -> AppResult<Vec<Event>> {
+        let conn = self.0.lock().unwrap();
+        let mut stmt = conn.prepare(&format!(
+            "SELECT {} FROM events WHERE rrule IS NOT NULL OR (start_ts < ?2 AND end_ts > ?1) ORDER BY start_ts ASC",
+            Self::EVENT_COLUMNS
+        ))?;
+        let rows = stmt.query_map(params![start_ts, end_ts], Self::row_to_event)?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    pub fn list_all_events(&self) -> AppResult<Vec<Event>> {
+        let conn = self.0.lock().unwrap();
+        let mut stmt = conn.prepare(&format!("SELECT {} FROM events ORDER BY start_ts ASC", Self::EVENT_COLUMNS))?;
+        let rows = stmt.query_map([], Self::row_to_event)?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    pub fn list_events_with_reminders(&self) -> AppResult<Vec<Event>> {
+        let conn = self.0.lock().unwrap();
+        let mut stmt = conn.prepare(&format!(
+            "SELECT {} FROM events WHERE reminder_minutes IS NOT NULL",
+            Self::EVENT_COLUMNS
+        ))?;
+        let rows = stmt.query_map([], Self::row_to_event)?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    pub fn get_event(&self, id: &str) -> AppResult<Event> {
+        let conn = self.0.lock().unwrap();
+        conn.query_row(
+            &format!("SELECT {} FROM events WHERE id = ?1", Self::EVENT_COLUMNS),
+            params![id],
+            Self::row_to_event,
+        )
+        .map_err(|e| e.into())
+    }
+
+    pub fn create_event(&self, new: NewEvent) -> AppResult<Event> {
+        let id = Uuid::new_v4().to_string();
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "INSERT INTO events (id, title, location, description, start_ts, end_ts, all_day, account_id, google_event_id, rrule, reminder_minutes, category)
+             VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, NULL, ?9, ?10, ?11)",
+            params![
+                id,
+                new.title,
+                new.location,
+                new.description,
+                new.start_ts,
+                new.end_ts,
+                new.all_day as i32,
+                new.account_id,
+                new.rrule,
+                new.reminder_minutes,
+                new.category,
+            ],
+        )?;
+        Ok(Event {
+            id: id.clone(),
+            base_id: id,
+            title: new.title,
+            location: new.location,
+            description: new.description,
+            start_ts: new.start_ts,
+            end_ts: new.end_ts,
+            all_day: new.all_day,
+            account_id: new.account_id,
+            google_event_id: None,
+            rrule: new.rrule,
+            reminder_minutes: new.reminder_minutes,
+            category: new.category,
+            exdates: None,
+            series_id: None,
+        })
+    }
+
+    /// Inserts a plain, purely local event (no calendar link, no recurrence) —
+    /// used by ICS import.
+    pub fn insert_event(&self, event: &Event) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "INSERT INTO events (id, title, location, description, start_ts, end_ts, all_day, account_id, google_event_id, rrule, reminder_minutes, category)
+             VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, NULL, NULL, NULL, NULL, NULL)",
+            params![
+                event.id,
+                event.title,
+                event.location,
+                event.description,
+                event.start_ts,
+                event.end_ts,
+                event.all_day as i32,
+            ],
+        )?;
+        Ok(())
+    }
+
+    pub fn update_event(&self, event: &Event) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "UPDATE events SET title = ?1, location = ?2, description = ?3, start_ts = ?4, end_ts = ?5, all_day = ?6,
+             rrule = ?7, reminder_minutes = ?8, category = ?9 WHERE id = ?10",
+            params![
+                event.title,
+                event.location,
+                event.description,
+                event.start_ts,
+                event.end_ts,
+                event.all_day as i32,
+                event.rrule,
+                event.reminder_minutes,
+                event.category,
+                event.id,
+            ],
+        )?;
+        Ok(())
+    }
+
+    pub fn set_event_google_id(&self, id: &str, google_id: &str) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute("UPDATE events SET google_event_id = ?1 WHERE id = ?2", params![google_id, id])?;
+        Ok(())
+    }
+
+    /// Replaces every event previously synced from `account_id` that overlapped
+    /// `[time_min, time_max)` with the freshly-fetched set — the simplest correct
+    /// way to reflect Google-side edits/deletions without a full sync-token diff.
+    pub fn replace_google_events(&self, account_id: &str, time_min: i64, time_max: i64, events: &[Event]) -> AppResult<usize> {
+        let mut conn = self.0.lock().unwrap();
+        let tx = conn.transaction()?;
+
+        // Preserve locally-set categories across the delete+reinsert below —
+        // Google doesn't know about them, so a resync must not wipe them.
+        let mut categories: std::collections::HashMap<String, String> = std::collections::HashMap::new();
+        {
+            let mut stmt = tx.prepare(
+                "SELECT google_event_id, category FROM events
+                 WHERE account_id = ?1 AND start_ts < ?3 AND end_ts > ?2 AND category IS NOT NULL AND google_event_id IS NOT NULL",
+            )?;
+            let rows = stmt.query_map(params![account_id, time_min, time_max], |row| {
+                Ok((row.get::<_, String>(0)?, row.get::<_, String>(1)?))
+            })?;
+            for r in rows {
+                let (gid, cat) = r?;
+                categories.insert(gid, cat);
+            }
+        }
+
+        tx.execute(
+            "DELETE FROM events WHERE account_id = ?1 AND start_ts < ?3 AND end_ts > ?2",
+            params![account_id, time_min, time_max],
+        )?;
+        for e in events {
+            let category = e.google_event_id.as_ref().and_then(|gid| categories.get(gid));
+            tx.execute(
+                "INSERT INTO events (id, title, location, description, start_ts, end_ts, all_day, account_id, google_event_id, rrule, reminder_minutes, category)
+                 VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, NULL, ?11)",
+                params![e.id, e.title, e.location, e.description, e.start_ts, e.end_ts, e.all_day as i32, account_id, e.google_event_id, e.rrule, category],
+            )?;
+        }
+        tx.commit()?;
+        Ok(events.len())
+    }
+
+    pub fn delete_event(&self, id: &str) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        // Deleting a whole series should take its single-occurrence overrides with it,
+        // rather than leaving them behind as orphaned standalone events.
+        conn.execute("DELETE FROM events WHERE series_id = ?1", params![id])?;
+        conn.execute("DELETE FROM events WHERE id = ?1", params![id])?;
+        Ok(())
+    }
+
+    fn task_priority_str(p: TaskPriority) -> &'static str {
+        match p {
+            TaskPriority::Low => "low",
+            TaskPriority::Normal => "normal",
+            TaskPriority::High => "high",
+        }
+    }
+
+    fn row_to_task(row: &rusqlite::Row) -> rusqlite::Result<Task> {
+        let priority: String = row.get(4)?;
+        Ok(Task {
+            id: row.get(0)?,
+            title: row.get(1)?,
+            description: row.get(2)?,
+            due_ts: row.get(3)?,
+            priority: match priority.as_str() {
+                "low" => TaskPriority::Low,
+                "high" => TaskPriority::High,
+                _ => TaskPriority::Normal,
+            },
+            completed: row.get::<_, i32>(5)? != 0,
+            created_ts: row.get(6)?,
+            source_account_id: row.get(7)?,
+            source_folder: row.get(8)?,
+            source_uid: row.get(9)?,
+        })
+    }
+
+    const TASK_COLUMNS: &'static str =
+        "id, title, description, due_ts, priority, completed, created_ts, source_account_id, source_folder, source_uid";
+
+    pub fn list_tasks(&self) -> AppResult<Vec<Task>> {
+        let conn = self.0.lock().unwrap();
+        let mut stmt = conn.prepare(&format!(
+            "SELECT {} FROM tasks ORDER BY completed ASC, (due_ts IS NULL) ASC, due_ts ASC, created_ts DESC",
+            Self::TASK_COLUMNS
+        ))?;
+        let rows = stmt.query_map([], Self::row_to_task)?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    pub fn create_task(&self, new: NewTask) -> AppResult<Task> {
+        let id = Uuid::new_v4().to_string();
+        let created_ts = chrono::Utc::now().timestamp();
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "INSERT INTO tasks (id, title, description, due_ts, priority, completed, created_ts, source_account_id, source_folder, source_uid)
+             VALUES (?1, ?2, ?3, ?4, ?5, 0, ?6, ?7, ?8, ?9)",
+            params![
+                id,
+                new.title,
+                new.description,
+                new.due_ts,
+                Self::task_priority_str(new.priority),
+                created_ts,
+                new.source_account_id,
+                new.source_folder,
+                new.source_uid,
+            ],
+        )?;
+        Ok(Task {
+            id,
+            title: new.title,
+            description: new.description,
+            due_ts: new.due_ts,
+            priority: new.priority,
+            completed: false,
+            created_ts,
+            source_account_id: new.source_account_id,
+            source_folder: new.source_folder,
+            source_uid: new.source_uid,
+        })
+    }
+
+    pub fn update_task(&self, task: &Task) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "UPDATE tasks SET title = ?1, description = ?2, due_ts = ?3, priority = ?4, completed = ?5 WHERE id = ?6",
+            params![
+                task.title,
+                task.description,
+                task.due_ts,
+                Self::task_priority_str(task.priority),
+                task.completed as i32,
+                task.id,
+            ],
+        )?;
+        Ok(())
+    }
+
+    pub fn set_task_completed(&self, id: &str, completed: bool) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute("UPDATE tasks SET completed = ?1 WHERE id = ?2", params![completed as i32, id])?;
+        Ok(())
+    }
+
+    pub fn delete_task(&self, id: &str) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute("DELETE FROM tasks WHERE id = ?1", params![id])?;
+        Ok(())
+    }
+
+    fn row_to_contact_group(row: &rusqlite::Row) -> rusqlite::Result<ContactGroup> {
+        let json: String = row.get(2)?;
+        Ok(ContactGroup {
+            id: row.get(0)?,
+            name: row.get(1)?,
+            member_ids: serde_json::from_str(&json).unwrap_or_default(),
+        })
+    }
+
+    pub fn list_contact_groups(&self) -> AppResult<Vec<ContactGroup>> {
+        let conn = self.0.lock().unwrap();
+        let mut stmt = conn.prepare("SELECT id, name, member_ids_json FROM contact_groups ORDER BY name COLLATE NOCASE ASC")?;
+        let rows = stmt.query_map([], Self::row_to_contact_group)?;
+        let mut out = Vec::new();
+        for r in rows {
+            out.push(r?);
+        }
+        Ok(out)
+    }
+
+    pub fn create_contact_group(&self, new: NewContactGroup) -> AppResult<ContactGroup> {
+        let id = Uuid::new_v4().to_string();
+        let json = serde_json::to_string(&new.member_ids).unwrap_or_else(|_| "[]".to_string());
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "INSERT INTO contact_groups (id, name, member_ids_json) VALUES (?1, ?2, ?3)",
+            params![id, new.name, json],
+        )?;
+        Ok(ContactGroup { id, name: new.name, member_ids: new.member_ids })
+    }
+
+    pub fn update_contact_group(&self, group: &ContactGroup) -> AppResult<()> {
+        let json = serde_json::to_string(&group.member_ids).unwrap_or_else(|_| "[]".to_string());
+        let conn = self.0.lock().unwrap();
+        conn.execute(
+            "UPDATE contact_groups SET name = ?1, member_ids_json = ?2 WHERE id = ?3",
+            params![group.name, json, group.id],
+        )?;
+        Ok(())
+    }
+
+    pub fn delete_contact_group(&self, id: &str) -> AppResult<()> {
+        let conn = self.0.lock().unwrap();
+        conn.execute("DELETE FROM contact_groups WHERE id = ?1", params![id])?;
+        Ok(())
+    }
+}
diff --git a/src-tauri/src/error.rs b/src-tauri/src/error.rs
new file mode 100644
index 0000000..6b9520c
--- /dev/null
+++ b/src-tauri/src/error.rs
@@ -0,0 +1,50 @@
+use serde::Serialize;
+
+#[derive(Debug, thiserror::Error)]
+pub enum AppError {
+    #[error("IMAP error: {0}")]
+    Imap(String),
+    #[error("SMTP error: {0}")]
+    Smtp(String),
+    #[error("POP3 error: {0}")]
+    Pop3(String),
+    #[error("Database error: {0}")]
+    Db(String),
+    #[error("Keychain error: {0}")]
+    Keychain(String),
+    #[error("Parse error: {0}")]
+    Parse(String),
+    #[error("Not found: {0}")]
+    NotFound(String),
+    #[error("{0}")]
+    Other(String),
+}
+
+impl Serialize for AppError {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        serializer.serialize_str(&self.to_string())
+    }
+}
+
+impl From<rusqlite::Error> for AppError {
+    fn from(e: rusqlite::Error) -> Self {
+        AppError::Db(e.to_string())
+    }
+}
+
+impl From<keyring::Error> for AppError {
+    fn from(e: keyring::Error) -> Self {
+        AppError::Keychain(e.to_string())
+    }
+}
+
+impl From<anyhow::Error> for AppError {
+    fn from(e: anyhow::Error) -> Self {
+        AppError::Other(e.to_string())
+    }
+}
+
+pub type AppResult<T> = Result<T, AppError>;
diff --git a/src-tauri/src/gcal.rs b/src-tauri/src/gcal.rs
new file mode 100644
index 0000000..4c72902
--- /dev/null
+++ b/src-tauri/src/gcal.rs
@@ -0,0 +1,200 @@
+use crate::error::{AppError, AppResult};
+use crate::models::Event;
+use chrono::{Local, NaiveDate, TimeZone, Utc};
+use serde::{Deserialize, Serialize};
+use serde_json::json;
+use uuid::Uuid;
+
+const EVENTS_URL: &str = "https://www.googleapis.com/calendar/v3/calendars/primary/events";
+
+fn client() -> reqwest::blocking::Client {
+    reqwest::blocking::Client::new()
+}
+
+fn rfc3339(ts: i64) -> String {
+    Utc.timestamp_opt(ts, 0).single().map(|d| d.to_rfc3339()).unwrap_or_default()
+}
+
+#[derive(Debug, Deserialize)]
+struct GDateTime {
+    #[serde(rename = "dateTime")]
+    date_time: Option<String>,
+    date: Option<String>,
+}
+
+#[derive(Debug, Deserialize)]
+struct GEvent {
+    id: String,
+    #[serde(default)]
+    summary: String,
+    #[serde(default)]
+    location: Option<String>,
+    #[serde(default)]
+    description: Option<String>,
+    #[serde(default)]
+    status: Option<String>,
+    start: Option<GDateTime>,
+    end: Option<GDateTime>,
+}
+
+#[derive(Debug, Deserialize)]
+struct ListResponse {
+    #[serde(default)]
+    items: Vec<GEvent>,
+}
+
+fn parse_gdatetime(d: &GDateTime) -> Option<(i64, bool)> {
+    if let Some(dt) = &d.date_time {
+        let parsed = chrono::DateTime::parse_from_rfc3339(dt).ok()?;
+        return Some((parsed.timestamp(), false));
+    }
+    if let Some(date) = &d.date {
+        let nd = NaiveDate::parse_from_str(date, "%Y-%m-%d").ok()?;
+        let dt = nd.and_hms_opt(0, 0, 0)?;
+        let local = Local.from_local_datetime(&dt).single()?;
+        return Some((local.timestamp(), true));
+    }
+    None
+}
+
+fn check_status(resp: reqwest::blocking::Response, action: &str) -> AppResult<reqwest::blocking::Response> {
+    if resp.status().as_u16() == 401 || resp.status().as_u16() == 403 {
+        let status = resp.status();
+        let body = resp.text().unwrap_or_default();
+        return Err(AppError::Other(format!(
+            "Kalenderzugriff verweigert ({action}, {status}). Entweder fehlt die Berechtigung (Konto neu verbinden) \
+             oder die Google Calendar API ist im Google-Cloud-Projekt nicht aktiviert (APIs & Services → Library). \
+             Google-Antwort: {body}"
+        )));
+    }
+    if !resp.status().is_success() {
+        let status = resp.status();
+        let body = resp.text().unwrap_or_default();
+        return Err(AppError::Other(format!("Google Kalender: {action} fehlgeschlagen ({status}): {body}")));
+    }
+    Ok(resp)
+}
+
+pub fn list_events(access_token: &str, time_min: i64, time_max: i64) -> AppResult<Vec<Event>> {
+    let resp = client()
+        .get(EVENTS_URL)
+        .bearer_auth(access_token)
+        .query(&[
+            ("timeMin", rfc3339(time_min)),
+            ("timeMax", rfc3339(time_max)),
+            ("singleEvents", "true".to_string()),
+            ("maxResults", "2500".to_string()),
+            ("orderBy", "startTime".to_string()),
+        ])
+        .send()
+        .map_err(|e| AppError::Other(e.to_string()))?;
+    let resp = check_status(resp, "Abrufen")?;
+    let parsed: ListResponse = resp.json().map_err(|e| AppError::Other(e.to_string()))?;
+
+    let mut out = Vec::new();
+    for g in parsed.items {
+        if g.status.as_deref() == Some("cancelled") {
+            continue;
+        }
+        let (Some(start), Some(end)) = (g.start.as_ref(), g.end.as_ref()) else {
+            continue;
+        };
+        let (Some((start_ts, all_day)), Some((end_ts, _))) = (parse_gdatetime(start), parse_gdatetime(end)) else {
+            continue;
+        };
+        let id = Uuid::new_v4().to_string();
+        out.push(Event {
+            id: id.clone(),
+            base_id: id,
+            title: if g.summary.is_empty() { "(Ohne Titel)".to_string() } else { g.summary },
+            location: g.location,
+            description: g.description,
+            start_ts,
+            end_ts,
+            all_day,
+            account_id: None,
+            google_event_id: Some(g.id),
+            rrule: None,
+            reminder_minutes: None,
+            category: None,
+            exdates: None,
+            series_id: None,
+        });
+    }
+    Ok(out)
+}
+
+#[derive(Serialize)]
+struct GDateTimeOut {
+    #[serde(rename = "dateTime", skip_serializing_if = "Option::is_none")]
+    date_time: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    date: Option<String>,
+}
+
+fn to_gdatetime(ts: i64, all_day: bool) -> GDateTimeOut {
+    if all_day {
+        let date = Local
+            .timestamp_opt(ts, 0)
+            .single()
+            .map(|d| d.format("%Y-%m-%d").to_string())
+            .unwrap_or_default();
+        GDateTimeOut { date_time: None, date: Some(date) }
+    } else {
+        GDateTimeOut { date_time: Some(rfc3339(ts)), date: None }
+    }
+}
+
+fn event_body(event: &Event) -> serde_json::Value {
+    json!({
+        "summary": event.title,
+        "location": event.location,
+        "description": event.description,
+        "start": to_gdatetime(event.start_ts, event.all_day),
+        "end": to_gdatetime(event.end_ts, event.all_day),
+    })
+}
+
+#[derive(Deserialize)]
+struct InsertResponse {
+    id: String,
+}
+
+pub fn insert_event(access_token: &str, event: &Event) -> AppResult<String> {
+    let resp = client()
+        .post(EVENTS_URL)
+        .bearer_auth(access_token)
+        .json(&event_body(event))
+        .send()
+        .map_err(|e| AppError::Other(e.to_string()))?;
+    let resp = check_status(resp, "Erstellen")?;
+    let parsed: InsertResponse = resp.json().map_err(|e| AppError::Other(e.to_string()))?;
+    Ok(parsed.id)
+}
+
+pub fn update_event(access_token: &str, google_id: &str, event: &Event) -> AppResult<()> {
+    let url = format!("{EVENTS_URL}/{google_id}");
+    let resp = client()
+        .put(&url)
+        .bearer_auth(access_token)
+        .json(&event_body(event))
+        .send()
+        .map_err(|e| AppError::Other(e.to_string()))?;
+    check_status(resp, "Aktualisieren")?;
+    Ok(())
+}
+
+pub fn delete_event(access_token: &str, google_id: &str) -> AppResult<()> {
+    let url = format!("{EVENTS_URL}/{google_id}");
+    let resp = client()
+        .delete(&url)
+        .bearer_auth(access_token)
+        .send()
+        .map_err(|e| AppError::Other(e.to_string()))?;
+    // Google returns 410 Gone if the event was already removed server-side — treat as success.
+    if resp.status().as_u16() == 410 {
+        return Ok(());
+    }
+    check_status(resp, "Löschen")?;
+    Ok(())
+}
diff --git a/src-tauri/src/gcontacts.rs b/src-tauri/src/gcontacts.rs
new file mode 100644
index 0000000..868e79b
--- /dev/null
+++ b/src-tauri/src/gcontacts.rs
@@ -0,0 +1,228 @@
+use crate::error::{AppError, AppResult};
+use serde::Deserialize;
+
+const CONNECTIONS_URL: &str = "https://people.googleapis.com/v1/people/me/connections";
+const OTHER_CONTACTS_URL: &str = "https://people.googleapis.com/v1/otherContacts";
+
+fn client() -> reqwest::blocking::Client {
+    reqwest::blocking::Client::new()
+}
+
+#[derive(Debug, Deserialize)]
+struct GName {
+    #[serde(rename = "displayName")]
+    display_name: Option<String>,
+}
+
+#[derive(Debug, Deserialize)]
+struct GEmailAddress {
+    value: Option<String>,
+}
+
+#[derive(Debug, Deserialize)]
+struct GOrganization {
+    name: Option<String>,
+}
+
+#[derive(Debug, Deserialize)]
+struct GPhoneNumber {
+    value: Option<String>,
+}
+
+#[derive(Debug, Deserialize)]
+struct GAddress {
+    #[serde(rename = "formattedValue")]
+    formatted_value: Option<String>,
+}
+
+#[derive(Debug, Deserialize)]
+struct GPerson {
+    #[serde(rename = "resourceName", default)]
+    resource_name: String,
+    names: Option<Vec<GName>>,
+    #[serde(rename = "emailAddresses")]
+    email_addresses: Option<Vec<GEmailAddress>>,
+    #[serde(default)]
+    organizations: Option<Vec<GOrganization>>,
+    #[serde(rename = "phoneNumbers", default)]
+    phone_numbers: Option<Vec<GPhoneNumber>>,
+    #[serde(default)]
+    addresses: Option<Vec<GAddress>>,
+}
+
+#[derive(Debug, Deserialize)]
+struct ConnectionsResponse {
+    #[serde(default)]
+    connections: Vec<GPerson>,
+    #[serde(rename = "nextPageToken")]
+    next_page_token: Option<String>,
+}
+
+#[derive(Debug, Deserialize)]
+struct OtherContactsResponse {
+    #[serde(default, rename = "otherContacts")]
+    other_contacts: Vec<GPerson>,
+    #[serde(rename = "nextPageToken")]
+    next_page_token: Option<String>,
+}
+
+pub struct ParsedContact {
+    pub name: String,
+    pub email: Option<String>,
+    pub phone: Option<String>,
+    pub address: Option<String>,
+    pub company: Option<String>,
+    pub resource_name: String,
+}
+
+fn check_status(resp: reqwest::blocking::Response) -> AppResult<reqwest::blocking::Response> {
+    if resp.status().as_u16() == 401 || resp.status().as_u16() == 403 {
+        let status = resp.status();
+        let body = resp.text().unwrap_or_default();
+        return Err(AppError::Other(format!(
+            "Kontaktzugriff verweigert ({status}). Entweder fehlt die Berechtigung (Konto neu verbinden) oder die \
+             People API ist im Google-Cloud-Projekt nicht aktiviert (APIs & Services → Library). Google-Antwort: {body}"
+        )));
+    }
+    if !resp.status().is_success() {
+        let status = resp.status();
+        let body = resp.text().unwrap_or_default();
+        return Err(AppError::Other(format!("Google Kontakte: Abrufen fehlgeschlagen ({status}): {body}")));
+    }
+    Ok(resp)
+}
+
+fn parse_person(person: GPerson) -> Option<ParsedContact> {
+    let email = person
+        .email_addresses
+        .as_ref()
+        .and_then(|list| list.first())
+        .and_then(|e| e.value.clone())
+        .filter(|e| !e.is_empty());
+    let phone = person
+        .phone_numbers
+        .as_ref()
+        .and_then(|list| list.first())
+        .and_then(|p| p.value.clone())
+        .filter(|p| !p.is_empty());
+    let address = person
+        .addresses
+        .as_ref()
+        .and_then(|list| list.first())
+        .and_then(|a| a.formatted_value.clone())
+        .filter(|a| !a.is_empty());
+    let display_name = person
+        .names
+        .as_ref()
+        .and_then(|list| list.first())
+        .and_then(|n| n.display_name.clone())
+        .filter(|n| !n.is_empty());
+
+    if email.is_none() && phone.is_none() && address.is_none() && display_name.is_none() {
+        eprintln!("People API: Kontakt „{}“ übersprungen (keine verwertbaren Felder)", person.resource_name);
+        return None;
+    }
+    let name = display_name
+        .or_else(|| email.clone())
+        .or_else(|| phone.clone())
+        .unwrap_or_else(|| "Unbenannt".to_string());
+    let company = person
+        .organizations
+        .as_ref()
+        .and_then(|list| list.first())
+        .and_then(|o| o.name.clone());
+    let resource_name = person.resource_name.clone();
+    Some(ParsedContact { name, email, phone, address, company, resource_name })
+}
+
+/// Pulls every contact explicitly saved to "My Contacts", paginating through
+/// the People API's connections endpoint.
+fn list_connections(access_token: &str) -> AppResult<Vec<ParsedContact>> {
+    let mut out = Vec::new();
+    let mut page_token: Option<String> = None;
+
+    loop {
+        let mut req = client().get(CONNECTIONS_URL).bearer_auth(access_token).query(&[
+            ("personFields", "names,emailAddresses,organizations,phoneNumbers,addresses"),
+            ("pageSize", "1000"),
+        ]);
+        if let Some(token) = &page_token {
+            req = req.query(&[("pageToken", token.as_str())]);
+        }
+        let resp = req.send().map_err(|e| AppError::Other(e.to_string()))?;
+        let resp = check_status(resp)?;
+        let parsed: ConnectionsResponse = resp.json().map_err(|e| AppError::Other(e.to_string()))?;
+
+        out.extend(parsed.connections.into_iter().filter_map(parse_person));
+
+        page_token = parsed.next_page_token;
+        if page_token.is_none() {
+            break;
+        }
+    }
+
+    Ok(out)
+}
+
+/// Pulls "Other contacts" — people auto-collected from mail interactions that
+/// were never explicitly saved. This is where most of a typical Gmail user's
+/// actual correspondents live, so skipping it would make sync look empty
+/// even for an account with plenty of real email history.
+fn list_other_contacts(access_token: &str) -> AppResult<Vec<ParsedContact>> {
+    let mut out = Vec::new();
+    let mut page_token: Option<String> = None;
+
+    loop {
+        let mut req = client().get(OTHER_CONTACTS_URL).bearer_auth(access_token).query(&[
+            ("readMask", "names,emailAddresses,phoneNumbers"),
+            ("pageSize", "1000"),
+        ]);
+        if let Some(token) = &page_token {
+            req = req.query(&[("pageToken", token.as_str())]);
+        }
+        let resp = req.send().map_err(|e| AppError::Other(e.to_string()))?;
+        let resp = check_status(resp)?;
+        let parsed: OtherContactsResponse = resp.json().map_err(|e| AppError::Other(e.to_string()))?;
+
+        out.extend(parsed.other_contacts.into_iter().filter_map(parse_person));
+
+        page_token = parsed.next_page_token;
+        if page_token.is_none() {
+            break;
+        }
+    }
+
+    Ok(out)
+}
+
+/// Pulls both "My Contacts" and auto-collected "Other contacts". Duplicates
+/// across the two lists are harmless — the caller upserts by email.
+///
+/// "Other contacts" needs its own separate scope (`contacts.other.readonly`)
+/// beyond plain `contacts.readonly` — an account that hasn't reconnected since
+/// that scope was added will get a 403 here. That must not wipe out the
+/// "My Contacts" results we already fetched, so it's treated as non-fatal.
+pub fn list_contacts(access_token: &str) -> AppResult<Vec<ParsedContact>> {
+    let mut out = list_connections(access_token)?;
+    match list_other_contacts(access_token) {
+        Ok(other) => out.extend(other),
+        Err(e) => eprintln!("People API: 'Andere Kontakte' übersprungen ({e})"),
+    }
+    Ok(out)
+}
+
+/// Deletes a contact on the Google side. `resource_name` is the People API
+/// resource id (e.g. "people/c1234567890123456789"), already URL-path-safe.
+pub fn delete_contact(access_token: &str, resource_name: &str) -> AppResult<()> {
+    let url = format!("https://people.googleapis.com/v1/{resource_name}:deleteContact");
+    let resp = client()
+        .delete(&url)
+        .bearer_auth(access_token)
+        .send()
+        .map_err(|e| AppError::Other(e.to_string()))?;
+    if resp.status().as_u16() == 404 {
+        return Ok(());
+    }
+    check_status(resp)?;
+    Ok(())
+}
diff --git a/src-tauri/src/ics.rs b/src-tauri/src/ics.rs
new file mode 100644
index 0000000..ddd27b6
--- /dev/null
+++ b/src-tauri/src/ics.rs
@@ -0,0 +1,303 @@
+use crate::models::Event;
+use chrono::{Local, NaiveDate, NaiveDateTime, TimeZone, Utc};
+use uuid::Uuid;
+
+fn escape(s: &str) -> String {
+    s.replace('\\', "\\\\")
+        .replace(',', "\\,")
+        .replace(';', "\\;")
+        .replace('\n', "\\n")
+}
+
+fn unescape(s: &str) -> String {
+    s.replace("\\n", "\n")
+        .replace("\\N", "\n")
+        .replace("\\,", ",")
+        .replace("\\;", ";")
+        .replace("\\\\", "\\")
+}
+
+fn unfold(data: &str) -> String {
+    let mut out = String::with_capacity(data.len());
+    for raw_line in data.split('\n') {
+        let line = raw_line.trim_end_matches('\r');
+        if (line.starts_with(' ') || line.starts_with('\t')) && !out.is_empty() {
+            out.push_str(&line[1..]);
+        } else {
+            if !out.is_empty() {
+                out.push('\n');
+            }
+            out.push_str(line);
+        }
+    }
+    out
+}
+
+/// Parses a DTSTART/DTEND property line (with any params) into a unix timestamp
+/// and whether it represents an all-day (date-only) value.
+fn parse_dt(line: &str) -> Option<(i64, bool)> {
+    let colon = line.find(':')?;
+    let params = &line[..colon];
+    let value = line[colon + 1..].trim();
+
+    let is_date_only = params.to_uppercase().contains("VALUE=DATE") && !params.to_uppercase().contains("VALUE=DATE-TIME");
+
+    if is_date_only || (value.len() == 8 && !value.contains('T')) {
+        let date = NaiveDate::parse_from_str(value, "%Y%m%d").ok()?;
+        let dt = date.and_hms_opt(0, 0, 0)?;
+        let local = Local.from_local_datetime(&dt).single()?;
+        return Some((local.timestamp(), true));
+    }
+
+    if let Some(stripped) = value.strip_suffix('Z') {
+        let dt = NaiveDateTime::parse_from_str(stripped, "%Y%m%dT%H%M%S").ok()?;
+        return Some((Utc.from_utc_datetime(&dt).timestamp(), false));
+    }
+
+    let dt = NaiveDateTime::parse_from_str(value, "%Y%m%dT%H%M%S").ok()?;
+    let local = Local.from_local_datetime(&dt).single()?;
+    Some((local.timestamp(), false))
+}
+
+fn format_dt(ts: i64, all_day: bool) -> String {
+    if all_day {
+        Local.timestamp_opt(ts, 0).single().map(|d| d.format("%Y%m%d").to_string()).unwrap_or_default()
+    } else {
+        Utc.timestamp_opt(ts, 0).single().map(|d| d.format("%Y%m%dT%H%M%SZ").to_string()).unwrap_or_default()
+    }
+}
+
+pub fn export(events: &[Event]) -> String {
+    let mut out = String::new();
+    out.push_str("BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//MailClient//DE\r\nCALSCALE:GREGORIAN\r\n");
+    for e in events {
+        out.push_str("BEGIN:VEVENT\r\n");
+        out.push_str(&format!("UID:{}\r\n", e.id));
+        if e.all_day {
+            out.push_str(&format!("DTSTART;VALUE=DATE:{}\r\n", format_dt(e.start_ts, true)));
+            out.push_str(&format!("DTEND;VALUE=DATE:{}\r\n", format_dt(e.end_ts, true)));
+        } else {
+            out.push_str(&format!("DTSTART:{}\r\n", format_dt(e.start_ts, false)));
+            out.push_str(&format!("DTEND:{}\r\n", format_dt(e.end_ts, false)));
+        }
+        out.push_str(&format!("SUMMARY:{}\r\n", escape(&e.title)));
+        if let Some(loc) = e.location.as_ref().filter(|s| !s.is_empty()) {
+            out.push_str(&format!("LOCATION:{}\r\n", escape(loc)));
+        }
+        if let Some(desc) = e.description.as_ref().filter(|s| !s.is_empty()) {
+            out.push_str(&format!("DESCRIPTION:{}\r\n", escape(desc)));
+        }
+        if let Some(rrule) = e.rrule.as_ref().filter(|s| !s.is_empty()) {
+            out.push_str(&format!("RRULE:{rrule}\r\n"));
+        }
+        out.push_str("END:VEVENT\r\n");
+    }
+    out.push_str("END:VCALENDAR\r\n");
+    out
+}
+
+#[derive(serde::Serialize)]
+pub struct InviteInfo {
+    pub uid: String,
+    pub sequence: i32,
+    pub organizer_email: Option<String>,
+    pub organizer_name: Option<String>,
+    pub summary: String,
+    pub start_ts: i64,
+    pub end_ts: i64,
+    pub all_day: bool,
+}
+
+fn extract_mailto(line: &str) -> Option<String> {
+    let value = line.rsplit(':').next()?.trim();
+    Some(value.strip_prefix("mailto:").unwrap_or(value).trim().to_lowercase()).filter(|s| !s.is_empty())
+}
+
+fn extract_cn(line: &str) -> Option<String> {
+    let params = line.split(':').next()?;
+    let idx = params.to_uppercase().find("CN=")?;
+    let rest = &params[idx + 3..];
+    let end = rest.find(';').unwrap_or(rest.len());
+    let name = rest[..end].trim_matches('"').trim();
+    if name.is_empty() { None } else { Some(name.to_string()) }
+}
+
+/// Extracts organizer/UID/sequence plus the same title/time fields as `parse`, from
+/// the first VEVENT in an invite. Used to build an iTIP-style REPLY (Accept/Decline/
+/// Tentative) — deliberately separate from `parse`/`Event` since the general calendar
+/// model has no room for iTIP participant metadata and doesn't need it.
+pub fn parse_invite(data: &str) -> Option<InviteInfo> {
+    let unfolded = unfold(data);
+    let mut uid = String::new();
+    let mut sequence = 0i32;
+    let mut organizer_email = None;
+    let mut organizer_name = None;
+    let mut title = String::new();
+    let mut start_ts: Option<i64> = None;
+    let mut end_ts: Option<i64> = None;
+    let mut all_day = false;
+    let mut in_event = false;
+
+    for line in unfolded.lines() {
+        let upper = line.to_uppercase();
+        if upper == "BEGIN:VEVENT" {
+            in_event = true;
+            continue;
+        }
+        if !in_event {
+            continue;
+        }
+        if upper == "END:VEVENT" {
+            break;
+        }
+        if upper.starts_with("UID") {
+            if let Some(idx) = line.find(':') {
+                uid = line[idx + 1..].trim().to_string();
+            }
+        } else if upper.starts_with("SEQUENCE") {
+            if let Some(idx) = line.find(':') {
+                sequence = line[idx + 1..].trim().parse().unwrap_or(0);
+            }
+        } else if upper.starts_with("ORGANIZER") {
+            organizer_email = extract_mailto(line);
+            organizer_name = extract_cn(line);
+        } else if upper.starts_with("DTSTART") {
+            if let Some((ts, ad)) = parse_dt(line) {
+                start_ts = Some(ts);
+                all_day = ad;
+            }
+        } else if upper.starts_with("DTEND") {
+            if let Some((ts, _)) = parse_dt(line) {
+                end_ts = Some(ts);
+            }
+        } else if upper.starts_with("SUMMARY") {
+            if let Some(idx) = line.find(':') {
+                title = unescape(&line[idx + 1..]);
+            }
+        }
+    }
+
+    let start = start_ts?;
+    if uid.is_empty() {
+        return None;
+    }
+    Some(InviteInfo {
+        uid,
+        sequence,
+        organizer_email,
+        organizer_name,
+        summary: if title.is_empty() { "(Ohne Titel)".to_string() } else { title },
+        start_ts: start,
+        end_ts: end_ts.unwrap_or(start + if all_day { 86400 } else { 3600 }),
+        all_day,
+    })
+}
+
+/// Builds an iTIP METHOD:REPLY calendar object for an invite response
+/// (PARTSTAT one of ACCEPTED/DECLINED/TENTATIVE).
+pub fn build_reply(invite: &InviteInfo, attendee_email: &str, partstat: &str) -> String {
+    let mut out = String::new();
+    out.push_str("BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//MailClient//DE\r\nMETHOD:REPLY\r\n");
+    out.push_str("BEGIN:VEVENT\r\n");
+    out.push_str(&format!("UID:{}\r\n", invite.uid));
+    out.push_str(&format!("SEQUENCE:{}\r\n", invite.sequence));
+    if invite.all_day {
+        out.push_str(&format!("DTSTART;VALUE=DATE:{}\r\n", format_dt(invite.start_ts, true)));
+        out.push_str(&format!("DTEND;VALUE=DATE:{}\r\n", format_dt(invite.end_ts, true)));
+    } else {
+        out.push_str(&format!("DTSTART:{}\r\n", format_dt(invite.start_ts, false)));
+        out.push_str(&format!("DTEND:{}\r\n", format_dt(invite.end_ts, false)));
+    }
+    out.push_str(&format!("SUMMARY:{}\r\n", escape(&invite.summary)));
+    if let Some(organizer) = &invite.organizer_email {
+        out.push_str(&format!("ORGANIZER:mailto:{organizer}\r\n"));
+    }
+    out.push_str(&format!("ATTENDEE;PARTSTAT={partstat};ROLE=REQ-PARTICIPANT:mailto:{attendee_email}\r\n"));
+    out.push_str("END:VEVENT\r\n");
+    out.push_str("END:VCALENDAR\r\n");
+    out
+}
+
+pub fn parse(data: &str) -> Vec<Event> {
+    let unfolded = unfold(data);
+    let mut out = Vec::new();
+
+    let mut title = String::new();
+    let mut location: Option<String> = None;
+    let mut description: Option<String> = None;
+    let mut start_ts: Option<i64> = None;
+    let mut end_ts: Option<i64> = None;
+    let mut all_day = false;
+    let mut in_event = false;
+    let mut rrule: Option<String> = None;
+
+    for line in unfolded.lines() {
+        let upper = line.to_uppercase();
+        if upper == "BEGIN:VEVENT" {
+            in_event = true;
+            title.clear();
+            location = None;
+            description = None;
+            start_ts = None;
+            end_ts = None;
+            all_day = false;
+            rrule = None;
+            continue;
+        }
+        if !in_event {
+            continue;
+        }
+        if upper == "END:VEVENT" {
+            in_event = false;
+            if let (Some(start), true) = (start_ts, !title.is_empty() || start_ts.is_some()) {
+                let end = end_ts.unwrap_or(start + if all_day { 86400 } else { 3600 });
+                let id = Uuid::new_v4().to_string();
+                out.push(Event {
+                    id: id.clone(),
+                    base_id: id,
+                    title: if title.is_empty() { "(Ohne Titel)".to_string() } else { title.clone() },
+                    location: location.clone(),
+                    description: description.clone(),
+                    start_ts: start,
+                    end_ts: end,
+                    all_day,
+                    account_id: None,
+                    google_event_id: None,
+                    rrule: rrule.clone(),
+                    reminder_minutes: None,
+                    category: None,
+                    exdates: None,
+                    series_id: None,
+                });
+            }
+            continue;
+        }
+        if upper.starts_with("DTSTART") {
+            if let Some((ts, ad)) = parse_dt(line) {
+                start_ts = Some(ts);
+                all_day = ad;
+            }
+        } else if upper.starts_with("DTEND") {
+            if let Some((ts, _)) = parse_dt(line) {
+                end_ts = Some(ts);
+            }
+        } else if upper.starts_with("SUMMARY") {
+            if let Some(idx) = line.find(':') {
+                title = unescape(&line[idx + 1..]);
+            }
+        } else if upper.starts_with("LOCATION") {
+            if let Some(idx) = line.find(':') {
+                location = Some(unescape(&line[idx + 1..]));
+            }
+        } else if upper.starts_with("DESCRIPTION") {
+            if let Some(idx) = line.find(':') {
+                description = Some(unescape(&line[idx + 1..]));
+            }
+        } else if upper.starts_with("RRULE") {
+            if let Some(idx) = line.find(':') {
+                rrule = Some(line[idx + 1..].trim().to_string());
+            }
+        }
+    }
+    out
+}
diff --git a/src-tauri/src/idle.rs b/src-tauri/src/idle.rs
new file mode 100644
index 0000000..babd210
--- /dev/null
+++ b/src-tauri/src/idle.rs
@@ -0,0 +1,118 @@
+use crate::db::Db;
+use crate::error::{AppError, AppResult};
+use crate::imap_client;
+use crate::models::{Account, Protocol};
+use imap::extensions::idle;
+use std::collections::HashMap;
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::Mutex;
+use std::time::Duration;
+use tauri::{AppHandle, Emitter, Manager};
+use tauri_plugin_notification::NotificationExt;
+
+/// Last-known unseen count per account, used to detect *new* mail (an
+/// increase) rather than notifying on every mailbox change IDLE reports
+/// (read/flag changes on other clients also wake IDLE).
+pub struct UnseenState(pub Mutex<HashMap<String, u32>>);
+
+impl UnseenState {
+    pub fn new() -> Self {
+        UnseenState(Mutex::new(HashMap::new()))
+    }
+}
+
+/// User-configurable toggle for the native OS desktop notification on new
+/// mail (the in-app popup is a separate, purely frontend-driven concern).
+pub struct NotificationSettings(pub AtomicBool);
+
+impl NotificationSettings {
+    pub fn new() -> Self {
+        NotificationSettings(AtomicBool::new(true))
+    }
+}
+
+const RECONNECT_BACKOFF_SECS: u64 = 20;
+
+/// Spawns an IDLE watcher for every IMAP account currently in the DB.
+/// Called once at app startup.
+pub fn spawn_watchers(app: AppHandle) {
+    let accounts = {
+        let db = app.state::<Db>();
+        db.list_accounts().unwrap_or_default()
+    };
+    for account in accounts.into_iter().filter(|a| a.protocol == Protocol::Imap) {
+        spawn_watcher(app.clone(), account.id);
+    }
+}
+
+/// Spawns a persistent IMAP IDLE watcher for one account. Reconnects with a
+/// backoff on any I/O error, and exits cleanly once the account no longer
+/// exists in the DB (checked between IDLE cycles) — e.g. after deletion.
+pub fn spawn_watcher(app: AppHandle, account_id: String) {
+    tauri::async_runtime::spawn(async move {
+        loop {
+            let account = {
+                let db = app.state::<Db>();
+                db.list_accounts()
+                    .unwrap_or_default()
+                    .into_iter()
+                    .find(|a| a.id == account_id && a.protocol == Protocol::Imap)
+            };
+            let Some(account) = account else { break };
+
+            let app_c = app.clone();
+            let result = tauri::async_runtime::spawn_blocking(move || run_idle_loop(&app_c, &account)).await;
+
+            if !matches!(result, Ok(Ok(()))) {
+                tokio::time::sleep(Duration::from_secs(RECONNECT_BACKOFF_SECS)).await;
+            }
+        }
+    });
+}
+
+fn run_idle_loop(app: &AppHandle, account: &Account) -> AppResult<()> {
+    let mut session = imap_client::open_session(account)?;
+    session.select("INBOX").map_err(|e| AppError::Imap(e.to_string()))?;
+
+    loop {
+        {
+            let db = app.state::<Db>();
+            let still_exists = db.list_accounts().unwrap_or_default().iter().any(|a| a.id == account.id);
+            if !still_exists {
+                return Ok(());
+            }
+        }
+
+        session
+            .idle()
+            .wait_while(idle::stop_on_any)
+            .map_err(|e| AppError::Imap(e.to_string()))?;
+
+        let Ok(count) = imap_client::unseen_count(&mut session, "INBOX") else {
+            continue;
+        };
+        let prev = {
+            let state = app.state::<UnseenState>();
+            let mut map = state.0.lock().unwrap();
+            map.insert(account.id.clone(), count)
+        };
+        if let Some(prev) = prev {
+            if count > prev {
+                let delta = count - prev;
+                let body = if delta == 1 {
+                    format!("1 neue Nachricht in {}", account.label)
+                } else {
+                    format!("{delta} neue Nachrichten in {}", account.label)
+                };
+                let desktop_enabled = app.state::<NotificationSettings>().0.load(Ordering::Relaxed);
+                if desktop_enabled {
+                    let _ = app.notification().builder().title("Neue E-Mail").body(body).show();
+                }
+                let _ = app.emit(
+                    "new-mail",
+                    serde_json::json!({ "accountId": account.id, "folder": "INBOX" }),
+                );
+            }
+        }
+    }
+}
diff --git a/src-tauri/src/imap_client.rs b/src-tauri/src/imap_client.rs
new file mode 100644
index 0000000..a4b9ef5
--- /dev/null
+++ b/src-tauri/src/imap_client.rs
@@ -0,0 +1,259 @@
+use crate::error::{AppError, AppResult};
+use crate::mailutil::{parse_message_full, split_from, thread_ids};
+use crate::models::{Account, AuthMethod, Folder, MessageFull, MessageSummary};
+use crate::{accounts, oauth};
+use imap::types::Flag;
+use mailparse::{parse_mail, MailHeaderMap};
+
+type ImapSession = imap::Session<imap::Connection>;
+
+const FETCH_LIMIT: u32 = 60;
+const EXPORT_LIMIT: u32 = 500;
+
+pub fn connect(host: &str, port: u16, username: &str, password: &str) -> AppResult<ImapSession> {
+    let client = imap::ClientBuilder::new(host, port)
+        .connect()
+        .map_err(|e| AppError::Imap(e.to_string()))?;
+    client
+        .login(username, password)
+        .map_err(|(e, _)| AppError::Imap(e.to_string()))
+}
+
+struct XOAuth2 {
+    user: String,
+    access_token: String,
+}
+
+impl imap::Authenticator for XOAuth2 {
+    type Response = String;
+    fn process(&self, _challenge: &[u8]) -> Self::Response {
+        format!("user={}\x01auth=Bearer {}\x01\x01", self.user, self.access_token)
+    }
+}
+
+pub fn connect_oauth(host: &str, port: u16, email: &str, access_token: &str) -> AppResult<ImapSession> {
+    let client = imap::ClientBuilder::new(host, port)
+        .connect()
+        .map_err(|e| AppError::Imap(e.to_string()))?;
+    let auth = XOAuth2 {
+        user: email.to_string(),
+        access_token: access_token.to_string(),
+    };
+    client
+        .authenticate("XOAUTH2", &auth)
+        .map_err(|(e, _)| AppError::Imap(e.to_string()))
+}
+
+/// Opens an authenticated IMAP session for the given account, resolving either its
+/// stored password or (for OAuth accounts) refreshing a fresh access token first.
+pub fn open_session(account: &Account) -> AppResult<ImapSession> {
+    match account.auth_method {
+        AuthMethod::Password => {
+            let password = accounts::get_password(&account.id)?;
+            connect(&account.incoming_host, account.incoming_port, &account.username, &password)
+        }
+        AuthMethod::GoogleOauth => {
+            let refresh_token = accounts::get_password(&account.id)?;
+            let access_token = oauth::refresh_access_token(&refresh_token)?;
+            connect_oauth(&account.incoming_host, account.incoming_port, &account.email, &access_token)
+        }
+    }
+}
+
+pub fn list_folders(session: &mut ImapSession) -> AppResult<Vec<Folder>> {
+    let names = session
+        .list(None, Some("*"))
+        .map_err(|e| AppError::Imap(e.to_string()))?;
+    let mut out = Vec::new();
+    for n in names.iter() {
+        let delim = n.delimiter().unwrap_or("/");
+        let display = n.name().rsplit(delim).next().unwrap_or(n.name()).to_string();
+        let unread = session
+            .status(n.name(), "(UNSEEN)")
+            .ok()
+            .and_then(|m| m.unseen)
+            .unwrap_or(0);
+        out.push(Folder {
+            name: n.name().to_string(),
+            display_name: display,
+            unread,
+        });
+    }
+    Ok(out)
+}
+
+pub fn unseen_count(session: &mut ImapSession, folder: &str) -> AppResult<u32> {
+    let mailbox = session
+        .status(folder, "(UNSEEN)")
+        .map_err(|e| AppError::Imap(e.to_string()))?;
+    Ok(mailbox.unseen.unwrap_or(0))
+}
+
+pub fn fetch_messages(
+    session: &mut ImapSession,
+    account_id: &str,
+    folder: &str,
+) -> AppResult<Vec<MessageSummary>> {
+    let mailbox = session.select(folder).map_err(|e| AppError::Imap(e.to_string()))?;
+    if mailbox.exists == 0 {
+        return Ok(vec![]);
+    }
+    let end = mailbox.exists;
+    let start = if end > FETCH_LIMIT { end - FETCH_LIMIT + 1 } else { 1 };
+    let seq = format!("{}:{}", start, end);
+    let fetches = session
+        .fetch(seq, "(UID FLAGS RFC822.HEADER)")
+        .map_err(|e| AppError::Imap(e.to_string()))?;
+
+    let mut out = Vec::new();
+    for f in fetches.iter() {
+        let uid = match f.uid {
+            Some(u) => u,
+            None => continue,
+        };
+        let header_bytes = f.header().unwrap_or(&[]);
+        let parsed = parse_mail(header_bytes).ok();
+        let from_raw = parsed
+            .as_ref()
+            .and_then(|p| p.headers.get_first_value("From"))
+            .unwrap_or_default();
+        let (from_name, from_addr) = split_from(&from_raw);
+        let subject = parsed
+            .as_ref()
+            .and_then(|p| p.headers.get_first_value("Subject"))
+            .unwrap_or_else(|| "(kein Betreff)".to_string());
+        let date_raw = parsed
+            .as_ref()
+            .and_then(|p| p.headers.get_first_value("Date"))
+            .unwrap_or_default();
+        let timestamp = mailparse::dateparse(&date_raw).unwrap_or(0);
+        let is_read = f.flags().iter().any(|fl| matches!(fl, Flag::Seen));
+        let flagged = f.flags().iter().any(|fl| matches!(fl, Flag::Flagged));
+        let (message_id, thread_id) = thread_ids(parsed.as_ref(), &format!("{account_id}-{folder}-{uid}"));
+
+        out.push(MessageSummary {
+            uid,
+            account_id: account_id.to_string(),
+            folder: folder.to_string(),
+            from_name,
+            from_addr,
+            subject,
+            date: date_raw,
+            timestamp,
+            snippet: String::new(),
+            is_read,
+            has_attachments: false,
+            flagged,
+            message_id,
+            thread_id,
+            category: None,
+        });
+    }
+    out.sort_by(|a, b| b.timestamp.cmp(&a.timestamp));
+    Ok(out)
+}
+
+pub fn fetch_raw(session: &mut ImapSession, folder: &str, uid: u32) -> AppResult<Vec<u8>> {
+    session.select(folder).map_err(|e| AppError::Imap(e.to_string()))?;
+    let fetches = session
+        .uid_fetch(uid.to_string(), "(UID RFC822)")
+        .map_err(|e| AppError::Imap(e.to_string()))?;
+    let f = fetches
+        .iter()
+        .next()
+        .ok_or_else(|| AppError::NotFound(format!("message uid {uid} not found")))?;
+    Ok(f.body().unwrap_or(&[]).to_vec())
+}
+
+pub fn fetch_full_message(
+    session: &mut ImapSession,
+    account_id: &str,
+    folder: &str,
+    uid: u32,
+) -> AppResult<MessageFull> {
+    let raw = fetch_raw(session, folder, uid)?;
+    parse_message_full(account_id, folder, uid, &raw)
+}
+
+pub fn set_flag(session: &mut ImapSession, folder: &str, uid: u32, flag: &str, add: bool) -> AppResult<()> {
+    session.select(folder).map_err(|e| AppError::Imap(e.to_string()))?;
+    let query = if add {
+        format!("+FLAGS ({flag})")
+    } else {
+        format!("-FLAGS ({flag})")
+    };
+    session
+        .uid_store(uid.to_string(), query)
+        .map_err(|e| AppError::Imap(e.to_string()))?;
+    Ok(())
+}
+
+pub fn move_message(
+    session: &mut ImapSession,
+    from_folder: &str,
+    uid: u32,
+    to_folder: &str,
+) -> AppResult<()> {
+    session.select(from_folder).map_err(|e| AppError::Imap(e.to_string()))?;
+    if session.uid_mv(uid.to_string(), to_folder).is_ok() {
+        return Ok(());
+    }
+    // Server doesn't support MOVE (RFC 6851) -> fall back to COPY + delete + expunge.
+    session
+        .uid_copy(uid.to_string(), to_folder)
+        .map_err(|e| AppError::Imap(e.to_string()))?;
+    session
+        .uid_store(uid.to_string(), "+FLAGS (\\Deleted)")
+        .map_err(|e| AppError::Imap(e.to_string()))?;
+    session.expunge().map_err(|e| AppError::Imap(e.to_string()))?;
+    Ok(())
+}
+
+pub fn delete_message(session: &mut ImapSession, folder: &str, uid: u32) -> AppResult<()> {
+    session.select(folder).map_err(|e| AppError::Imap(e.to_string()))?;
+    session
+        .uid_store(uid.to_string(), "+FLAGS (\\Deleted)")
+        .map_err(|e| AppError::Imap(e.to_string()))?;
+    session.expunge().map_err(|e| AppError::Imap(e.to_string()))?;
+    Ok(())
+}
+
+pub fn create_folder(session: &mut ImapSession, name: &str) -> AppResult<()> {
+    session.create(name).map_err(|e| AppError::Imap(e.to_string()))
+}
+
+pub fn rename_folder(session: &mut ImapSession, from: &str, to: &str) -> AppResult<()> {
+    session.rename(from, to).map_err(|e| AppError::Imap(e.to_string()))
+}
+
+pub fn delete_folder(session: &mut ImapSession, name: &str) -> AppResult<()> {
+    session.delete(name).map_err(|e| AppError::Imap(e.to_string()))
+}
+
+pub fn append_message(session: &mut ImapSession, folder: &str, raw: &[u8]) -> AppResult<()> {
+    session
+        .append(folder, raw)
+        .finish()
+        .map_err(|e| AppError::Imap(e.to_string()))?;
+    Ok(())
+}
+
+/// Fetches raw RFC822 bytes for up to `EXPORT_LIMIT` of the most recent messages in a folder.
+pub fn export_folder(session: &mut ImapSession, folder: &str) -> AppResult<Vec<Vec<u8>>> {
+    let mailbox = session.select(folder).map_err(|e| AppError::Imap(e.to_string()))?;
+    if mailbox.exists == 0 {
+        return Ok(vec![]);
+    }
+    let end = mailbox.exists;
+    let start = if end > EXPORT_LIMIT { end - EXPORT_LIMIT + 1 } else { 1 };
+    let seq = format!("{}:{}", start, end);
+    let fetches = session
+        .fetch(seq, "RFC822")
+        .map_err(|e| AppError::Imap(e.to_string()))?;
+    Ok(fetches
+        .iter()
+        .filter_map(|f| f.body())
+        .filter(|b| !b.is_empty())
+        .map(|b| b.to_vec())
+        .collect())
+}
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
new file mode 100644
index 0000000..473383e
--- /dev/null
+++ b/src-tauri/src/lib.rs
@@ -0,0 +1,137 @@
+mod accounts;
+mod caldav;
+mod commands;
+mod db;
+mod error;
+mod gcal;
+mod gcontacts;
+mod ics;
+mod idle;
+mod imap_client;
+mod mailutil;
+mod mbox;
+mod models;
+mod oauth;
+mod pop3_client;
+mod recurrence;
+mod reminders;
+mod smtp_client;
+mod vcard;
+
+use db::Db;
+use idle::UnseenState;
+use tauri::Manager;
+
+#[cfg_attr(mobile, tauri::mobile_entry_point)]
+pub fn run() {
+    tauri::Builder::default()
+        .plugin(tauri_plugin_dialog::init())
+        .plugin(tauri_plugin_notification::init())
+        .setup(|app| {
+            if cfg!(debug_assertions) {
+                app.handle().plugin(
+                    tauri_plugin_log::Builder::default()
+                        .level(log::LevelFilter::Info)
+                        .build(),
+                )?;
+            }
+            let data_dir = app.path().app_data_dir()?;
+            let db = Db::open(&data_dir)?;
+            app.manage(db);
+            app.manage(UnseenState::new());
+            app.manage(idle::NotificationSettings::new());
+            app.manage(commands::PendingSends::new());
+            idle::spawn_watchers(app.handle().clone());
+            reminders::spawn_poller(app.handle().clone());
+            commands::rehydrate_scheduled_sends(app.handle());
+            Ok(())
+        })
+        .invoke_handler(tauri::generate_handler![
+            commands::add_account,
+            commands::list_accounts,
+            commands::delete_account,
+            commands::update_account,
+            commands::list_folders,
+            commands::create_folder,
+            commands::rename_folder,
+            commands::delete_folder,
+            commands::mark_folder_read,
+            commands::apply_rules_to_folder,
+            commands::sync_messages,
+            commands::list_cached_messages,
+            commands::get_message,
+            commands::send_message,
+            commands::send_message_at,
+            commands::cancel_scheduled_send,
+            commands::mark_read,
+            commands::delete_message,
+            commands::search_messages,
+            commands::search_all_messages,
+            commands::set_message_category,
+            commands::toggle_flag,
+            commands::move_message,
+            commands::list_contacts,
+            commands::search_contacts,
+            commands::add_contact,
+            commands::update_contact,
+            commands::delete_contact,
+            commands::toggle_contact_favorite,
+            commands::export_contacts_vcard,
+            commands::import_contacts_vcard,
+            commands::export_message_eml,
+            commands::export_folder_mbox,
+            commands::export_full_backup,
+            commands::import_eml_file,
+            commands::import_mbox_file,
+            commands::save_draft,
+            commands::load_draft,
+            commands::google_oauth_add_account,
+            commands::list_rules,
+            commands::create_rule,
+            commands::set_rule_enabled,
+            commands::delete_rule,
+            commands::list_events,
+            commands::create_event,
+            commands::update_event,
+            commands::delete_event,
+            commands::import_ics_file,
+            commands::import_ics_text,
+            commands::reply_to_invite,
+            commands::preview_invite,
+            commands::get_vacation_settings,
+            commands::save_vacation_settings,
+            commands::snooze_message,
+            commands::unsnooze_message,
+            commands::list_snoozed_messages,
+            commands::list_templates,
+            commands::create_template,
+            commands::update_template,
+            commands::delete_template,
+            commands::search_messages_advanced,
+            commands::update_event_occurrence,
+            commands::delete_event_occurrence,
+            commands::list_caldav_accounts,
+            commands::add_caldav_account,
+            commands::delete_caldav_account,
+            commands::sync_caldav_calendar,
+            commands::export_events_ics,
+            commands::get_event,
+            commands::list_upcoming_reminders,
+            commands::sync_google_calendar,
+            commands::sync_google_contacts,
+            commands::reconnect_google_account,
+            commands::set_desktop_notifications_enabled,
+            commands::list_tasks,
+            commands::create_task,
+            commands::update_task,
+            commands::delete_task,
+            commands::set_task_completed,
+            commands::create_task_from_message,
+            commands::list_contact_groups,
+            commands::create_contact_group,
+            commands::update_contact_group,
+            commands::delete_contact_group,
+        ])
+        .run(tauri::generate_context!())
+        .expect("error while running tauri application");
+}
diff --git a/src-tauri/src/mailutil.rs b/src-tauri/src/mailutil.rs
new file mode 100644
index 0000000..5f8bdaf
--- /dev/null
+++ b/src-tauri/src/mailutil.rs
@@ -0,0 +1,162 @@
+use crate::error::{AppError, AppResult};
+use crate::models::{AttachmentMeta, MessageFull, MessageSummary};
+use base64::Engine;
+use mailparse::{parse_mail, MailHeaderMap, ParsedMail};
+
+/// Derives (message_id, thread_id) from a parsed message's headers.
+/// thread_id is the root of the References chain, falling back to
+/// In-Reply-To, then to the message's own id — so every message always
+/// lands in a thread, even a singleton one.
+pub fn thread_ids(parsed: Option<&ParsedMail>, seed: &str) -> (String, String) {
+    let message_id = parsed
+        .and_then(|p| p.headers.get_first_value("Message-ID"))
+        .map(|s| s.trim().to_string())
+        .filter(|s| !s.is_empty())
+        .unwrap_or_else(|| format!("<local-{seed}>"));
+
+    let references = parsed.and_then(|p| p.headers.get_first_value("References")).unwrap_or_default();
+    let in_reply_to = parsed.and_then(|p| p.headers.get_first_value("In-Reply-To")).unwrap_or_default();
+
+    let thread_id = references
+        .split_whitespace()
+        .next()
+        .map(|s| s.to_string())
+        .filter(|s| !s.is_empty())
+        .or_else(|| {
+            let t = in_reply_to.trim().to_string();
+            if t.is_empty() { None } else { Some(t) }
+        })
+        .unwrap_or_else(|| message_id.clone());
+
+    (message_id, thread_id)
+}
+
+pub fn split_from(raw: &str) -> (String, String) {
+    if let Some(idx) = raw.rfind('<') {
+        let name = raw[..idx].trim().trim_matches('"').to_string();
+        let addr = raw[idx + 1..].trim_end_matches('>').trim().to_string();
+        if name.is_empty() {
+            (addr.clone(), addr)
+        } else {
+            (name, addr)
+        }
+    } else {
+        (raw.trim().to_string(), raw.trim().to_string())
+    }
+}
+
+fn walk_parts(
+    part: &ParsedMail,
+    text: &mut Option<String>,
+    html: &mut Option<String>,
+    attachments: &mut Vec<AttachmentMeta>,
+) {
+    if !part.subparts.is_empty() {
+        for sp in &part.subparts {
+            walk_parts(sp, text, html, attachments);
+        }
+        return;
+    }
+    let mimetype = part.ctype.mimetype.to_lowercase();
+    let disposition = part.get_content_disposition();
+    let filename = disposition
+        .params
+        .get("filename")
+        .cloned()
+        .or_else(|| part.ctype.params.get("name").cloned());
+    let is_attachment = disposition.disposition == mailparse::DispositionType::Attachment
+        || (filename.is_some() && !mimetype.starts_with("text/"));
+
+    if is_attachment {
+        if let Ok(raw) = part.get_body_raw() {
+            attachments.push(AttachmentMeta {
+                filename: filename.unwrap_or_else(|| "attachment".to_string()),
+                mime_type: mimetype,
+                size: raw.len(),
+                content_base64: base64::engine::general_purpose::STANDARD.encode(&raw),
+            });
+        }
+        return;
+    }
+
+    if mimetype == "text/html" && html.is_none() {
+        *html = part.get_body().ok();
+    } else if mimetype == "text/plain" && text.is_none() {
+        *text = part.get_body().ok();
+    }
+}
+
+/// Parses full RFC822 bytes into a `MessageFull`, extracting headers, body and attachments.
+pub fn parse_message_full(account_id: &str, folder: &str, uid: u32, raw: &[u8]) -> AppResult<MessageFull> {
+    let parsed = parse_mail(raw).map_err(|e| AppError::Parse(e.to_string()))?;
+
+    let from_raw = parsed.headers.get_first_value("From").unwrap_or_default();
+    let (from_name, from_addr) = split_from(&from_raw);
+    let to = parsed.headers.get_first_value("To").unwrap_or_default();
+    let subject = parsed
+        .headers
+        .get_first_value("Subject")
+        .unwrap_or_else(|| "(kein Betreff)".to_string());
+    let date = parsed.headers.get_first_value("Date").unwrap_or_default();
+
+    let mut text = None;
+    let mut html = None;
+    let mut attachments = Vec::new();
+    walk_parts(&parsed, &mut text, &mut html, &mut attachments);
+
+    Ok(MessageFull {
+        uid,
+        account_id: account_id.to_string(),
+        folder: folder.to_string(),
+        from_name,
+        from_addr,
+        to,
+        subject,
+        date,
+        body_html: html,
+        body_text: text,
+        attachments,
+    })
+}
+
+/// Builds a `MessageSummary` from full RFC822 bytes (used when importing local/appended mail).
+pub fn parse_message_summary(account_id: &str, folder: &str, uid: u32, raw: &[u8]) -> MessageSummary {
+    let parsed = parse_mail(raw).ok();
+    let from_raw = parsed
+        .as_ref()
+        .and_then(|p| p.headers.get_first_value("From"))
+        .unwrap_or_default();
+    let (from_name, from_addr) = split_from(&from_raw);
+    let subject = parsed
+        .as_ref()
+        .and_then(|p| p.headers.get_first_value("Subject"))
+        .unwrap_or_else(|| "(kein Betreff)".to_string());
+    let date_raw = parsed
+        .as_ref()
+        .and_then(|p| p.headers.get_first_value("Date"))
+        .unwrap_or_default();
+    let timestamp = mailparse::dateparse(&date_raw).unwrap_or(0);
+    let has_attachments = parsed
+        .as_ref()
+        .map(|p| p.parts().any(|part| part.get_content_disposition().disposition == mailparse::DispositionType::Attachment))
+        .unwrap_or(false);
+    let (message_id, thread_id) = thread_ids(parsed.as_ref(), &format!("{account_id}-{folder}-{uid}"));
+
+    MessageSummary {
+        uid,
+        account_id: account_id.to_string(),
+        folder: folder.to_string(),
+        from_name,
+        from_addr,
+        subject,
+        date: date_raw,
+        timestamp,
+        snippet: String::new(),
+        is_read: true,
+        has_attachments,
+        flagged: false,
+        message_id,
+        thread_id,
+        category: None,
+    }
+}
diff --git a/src-tauri/src/main.rs b/src-tauri/src/main.rs
new file mode 100644
index 0000000..ad5fe83
--- /dev/null
+++ b/src-tauri/src/main.rs
@@ -0,0 +1,6 @@
+// Prevents additional console window on Windows in release, DO NOT REMOVE!!
+#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
+
+fn main() {
+  app_lib::run();
+}
diff --git a/src-tauri/src/mbox.rs b/src-tauri/src/mbox.rs
new file mode 100644
index 0000000..08db650
--- /dev/null
+++ b/src-tauri/src/mbox.rs
@@ -0,0 +1,91 @@
+/// Minimal mboxrd reader/writer: https://en.wikipedia.org/wiki/Mbox#Modifications
+/// Lines matching `^>*From ` inside a message body are escaped with a leading `>`
+/// on write and un-escaped by stripping one leading `>` on read.
+fn mboxrd_escape(raw: &[u8]) -> Vec<u8> {
+    let mut out = Vec::with_capacity(raw.len() + 16);
+    let mut first = true;
+    for line in raw.split(|&b| b == b'\n') {
+        if !first {
+            out.push(b'\n');
+        }
+        first = false;
+        let content = line.strip_suffix(b"\r").unwrap_or(line);
+        let mut rest = content;
+        while let Some(r) = rest.strip_prefix(b">") {
+            rest = r;
+        }
+        if rest.starts_with(b"From ") {
+            out.push(b'>');
+        }
+        out.extend_from_slice(line);
+    }
+    out
+}
+
+fn unescape_line(line: &[u8]) -> &[u8] {
+    if let Some(rest) = line.strip_prefix(b">") {
+        let mut check = rest;
+        loop {
+            if check.starts_with(b"From ") {
+                return rest;
+            }
+            match check.strip_prefix(b">") {
+                Some(r2) => check = r2,
+                None => break,
+            }
+        }
+    }
+    line
+}
+
+pub fn append_entry(out: &mut Vec<u8>, from_addr: &str, timestamp: i64, raw: &[u8]) {
+    let date = chrono::DateTime::from_timestamp(timestamp, 0).unwrap_or_default();
+    let date_str = date.format("%a %b %e %H:%M:%S %Y");
+    let sender = if from_addr.is_empty() { "MAILER-DAEMON" } else { from_addr };
+    out.extend_from_slice(format!("From {sender} {date_str}\n").as_bytes());
+    out.extend_from_slice(&mboxrd_escape(raw));
+    if !out.ends_with(b"\n") {
+        out.push(b'\n');
+    }
+    out.push(b'\n');
+}
+
+/// Splits a full mbox file's bytes into individual raw RFC822 messages (CRLF line endings).
+pub fn split_entries(data: &[u8]) -> Vec<Vec<u8>> {
+    let mut messages: Vec<Vec<&[u8]>> = Vec::new();
+    let mut current: Vec<&[u8]> = Vec::new();
+    let mut prev_blank = true;
+
+    for line in data.split(|&b| b == b'\n') {
+        let content = line.strip_suffix(b"\r").unwrap_or(line);
+        let is_from_line = prev_blank && content.starts_with(b"From ");
+        if is_from_line {
+            if !current.is_empty() {
+                messages.push(std::mem::take(&mut current));
+            }
+            prev_blank = false;
+            continue;
+        }
+        prev_blank = content.is_empty();
+        current.push(line);
+    }
+    if !current.is_empty() {
+        messages.push(current);
+    }
+
+    messages
+        .into_iter()
+        .map(|lines| {
+            let mut out = Vec::new();
+            for (i, l) in lines.iter().enumerate() {
+                if i > 0 {
+                    out.extend_from_slice(b"\r\n");
+                }
+                let content = l.strip_suffix(b"\r").unwrap_or(l);
+                out.extend_from_slice(unescape_line(content));
+            }
+            out
+        })
+        .filter(|m: &Vec<u8>| !m.is_empty())
+        .collect()
+}
diff --git a/src-tauri/src/models.rs b/src-tauri/src/models.rs
new file mode 100644
index 0000000..2fa29ad
--- /dev/null
+++ b/src-tauri/src/models.rs
@@ -0,0 +1,359 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq)]
+#[serde(rename_all = "lowercase")]
+pub enum Protocol {
+    Imap,
+    Pop3,
+    Local,
+}
+
+#[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq, Default)]
+#[serde(rename_all = "snake_case")]
+pub enum AuthMethod {
+    #[default]
+    Password,
+    GoogleOauth,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Account {
+    pub id: String,
+    pub label: String,
+    pub email: String,
+    pub username: String,
+    pub protocol: Protocol,
+    pub incoming_host: String,
+    pub incoming_port: u16,
+    pub smtp_host: String,
+    pub smtp_port: u16,
+    pub smtp_starttls: bool,
+    #[serde(default)]
+    pub auth_method: AuthMethod,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct NewAccount {
+    pub label: String,
+    pub email: String,
+    pub username: String,
+    pub password: String,
+    pub protocol: Protocol,
+    pub incoming_host: String,
+    pub incoming_port: u16,
+    pub smtp_host: String,
+    pub smtp_port: u16,
+    pub smtp_starttls: bool,
+}
+
+#[derive(Debug, Clone, Serialize)]
+pub struct Folder {
+    pub name: String,
+    pub display_name: String,
+    pub unread: u32,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct MessageSummary {
+    pub uid: u32,
+    pub account_id: String,
+    pub folder: String,
+    pub from_name: String,
+    pub from_addr: String,
+    pub subject: String,
+    pub date: String,
+    pub timestamp: i64,
+    pub snippet: String,
+    pub is_read: bool,
+    pub has_attachments: bool,
+    pub flagged: bool,
+    #[serde(default)]
+    pub message_id: String,
+    #[serde(default)]
+    pub thread_id: String,
+    #[serde(default)]
+    pub category: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize)]
+pub struct AttachmentMeta {
+    pub filename: String,
+    pub mime_type: String,
+    pub size: usize,
+    pub content_base64: String,
+}
+
+#[derive(Debug, Clone, Serialize)]
+pub struct MessageFull {
+    pub uid: u32,
+    pub account_id: String,
+    pub folder: String,
+    pub from_name: String,
+    pub from_addr: String,
+    pub to: String,
+    pub subject: String,
+    pub date: String,
+    pub body_html: Option<String>,
+    pub body_text: Option<String>,
+    pub attachments: Vec<AttachmentMeta>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct OutgoingAttachment {
+    pub filename: String,
+    pub mime_type: String,
+    pub content_base64: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Contact {
+    pub id: String,
+    pub name: String,
+    pub email: Option<String>,
+    #[serde(default)]
+    pub phone: Option<String>,
+    #[serde(default)]
+    pub address: Option<String>,
+    pub company: Option<String>,
+    pub notes: Option<String>,
+    pub favorite: bool,
+    #[serde(default)]
+    pub google_account_id: Option<String>,
+    #[serde(default)]
+    pub google_resource_name: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ContactGroup {
+    pub id: String,
+    pub name: String,
+    pub member_ids: Vec<String>,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct NewContactGroup {
+    pub name: String,
+    pub member_ids: Vec<String>,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct NewContact {
+    pub name: String,
+    pub email: Option<String>,
+    #[serde(default)]
+    pub phone: Option<String>,
+    #[serde(default)]
+    pub address: Option<String>,
+    pub company: Option<String>,
+    pub notes: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize)]
+pub struct DraftPayload {
+    pub uid: u32,
+    pub account_id: Option<String>,
+    pub to: String,
+    pub cc: String,
+    pub subject: String,
+    pub body: String,
+}
+
+#[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq)]
+#[serde(rename_all = "snake_case")]
+pub enum RuleAction {
+    MoveTo,
+    MarkRead,
+    Flag,
+    Delete,
+}
+
+#[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq)]
+#[serde(rename_all = "snake_case")]
+pub enum MatchType {
+    All,
+    Any,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct RuleCondition {
+    pub field: String,
+    pub contains: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Rule {
+    pub id: String,
+    pub account_id: Option<String>,
+    pub conditions: Vec<RuleCondition>,
+    pub match_type: MatchType,
+    pub action: RuleAction,
+    pub action_value: Option<String>,
+    pub enabled: bool,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct NewRule {
+    pub account_id: Option<String>,
+    pub conditions: Vec<RuleCondition>,
+    pub match_type: MatchType,
+    pub action: RuleAction,
+    pub action_value: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Event {
+    pub id: String,
+    /// The real DB row id. Equals `id` for normal events; for an expanded
+    /// recurring occurrence, `id` is synthetic (`{base_id}#{occurrence_start}`)
+    /// while `base_id` points at the actual stored series row.
+    #[serde(default)]
+    pub base_id: String,
+    pub title: String,
+    pub location: Option<String>,
+    pub description: Option<String>,
+    pub start_ts: i64,
+    pub end_ts: i64,
+    pub all_day: bool,
+    pub account_id: Option<String>,
+    pub google_event_id: Option<String>,
+    pub rrule: Option<String>,
+    pub reminder_minutes: Option<i32>,
+    pub category: Option<String>,
+    /// Comma-separated occurrence start timestamps excluded from this series'
+    /// expansion (RFC5545 EXDATE equivalent) — only meaningful when `rrule` is set.
+    #[serde(default)]
+    pub exdates: Option<String>,
+    /// Set only on a single-occurrence override row: the id of the recurring
+    /// series it replaces one instance of. Such rows always have `rrule: None`.
+    #[serde(default)]
+    pub series_id: Option<String>,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct NewEvent {
+    pub title: String,
+    pub location: Option<String>,
+    pub description: Option<String>,
+    pub start_ts: i64,
+    pub end_ts: i64,
+    pub all_day: bool,
+    pub account_id: Option<String>,
+    pub rrule: Option<String>,
+    pub reminder_minutes: Option<i32>,
+    pub category: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ComposeMessage {
+    pub account_id: String,
+    pub to: String,
+    pub cc: Option<String>,
+    pub bcc: Option<String>,
+    pub subject: String,
+    pub body_html: String,
+    pub attachments: Vec<OutgoingAttachment>,
+    pub in_reply_to: Option<String>,
+    #[serde(default)]
+    pub reply_to: Option<String>,
+    #[serde(default)]
+    pub request_read_receipt: bool,
+    /// "high" | "low" | None (normal)
+    #[serde(default)]
+    pub importance: Option<String>,
+}
+
+#[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq)]
+#[serde(rename_all = "lowercase")]
+pub enum TaskPriority {
+    Low,
+    Normal,
+    High,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Task {
+    pub id: String,
+    pub title: String,
+    pub description: Option<String>,
+    pub due_ts: Option<i64>,
+    pub priority: TaskPriority,
+    pub completed: bool,
+    pub created_ts: i64,
+    pub source_account_id: Option<String>,
+    pub source_folder: Option<String>,
+    pub source_uid: Option<u32>,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct NewTask {
+    pub title: String,
+    pub description: Option<String>,
+    pub due_ts: Option<i64>,
+    pub priority: TaskPriority,
+    pub source_account_id: Option<String>,
+    pub source_folder: Option<String>,
+    pub source_uid: Option<u32>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct VacationSettings {
+    pub account_id: String,
+    pub enabled: bool,
+    pub start_ts: Option<i64>,
+    pub end_ts: Option<i64>,
+    pub subject: String,
+    pub body: String,
+}
+
+/// A generic CalDAV calendar connection (Nextcloud, iCloud, Radicale, ...) —
+/// independent of the mail `Account` table, since a CalDAV calendar isn't
+/// necessarily tied to a mail account the way Google Calendar is bolted onto a
+/// Google-OAuth mail account. `url` is the direct calendar collection URL (no
+/// principal/home-set auto-discovery); password is stored via the same OS
+/// keyring helper as mail account passwords, keyed by this struct's `id`.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct CaldavAccount {
+    pub id: String,
+    pub label: String,
+    pub url: String,
+    pub username: String,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct NewCaldavAccount {
+    pub label: String,
+    pub url: String,
+    pub username: String,
+    pub password: String,
+}
+
+#[derive(Debug, Clone, Serialize)]
+pub struct SnoozedMessage {
+    #[serde(flatten)]
+    pub message: MessageSummary,
+    pub until_ts: i64,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Template {
+    pub id: String,
+    pub name: String,
+    pub subject: String,
+    pub body: String,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct NewTemplate {
+    pub name: String,
+    pub subject: String,
+    pub body: String,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct NewVacationSettings {
+    pub enabled: bool,
+    pub start_ts: Option<i64>,
+    pub end_ts: Option<i64>,
+    pub subject: String,
+    pub body: String,
+}
diff --git a/src-tauri/src/oauth.rs b/src-tauri/src/oauth.rs
new file mode 100644
index 0000000..cd9ee85
--- /dev/null
+++ b/src-tauri/src/oauth.rs
@@ -0,0 +1,217 @@
+use crate::error::{AppError, AppResult};
+use base64::Engine;
+use serde::Deserialize;
+use sha2::{Digest, Sha256};
+use std::io::{BufRead, BufReader, Write};
+use std::net::TcpListener;
+use std::time::{Duration, Instant};
+use uuid::Uuid;
+
+// Google's "Desktop app" OAuth client type is a public client per RFC 8252 — this
+// client_secret is not treated as confidential by Google for this client type
+// (same model used by e.g. `gcloud`), so embedding it here is expected practice.
+const CLIENT_ID: &str = "838805598613-65t2qpqp0njk7ftn37ousqksqjpvi0ju.apps.googleusercontent.com";
+const CLIENT_SECRET: &str = "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";
+const AUTH_URL: &str = "https://accounts.google.com/o/oauth2/auth";
+const TOKEN_URL: &str = "https://oauth2.googleapis.com/token";
+const USERINFO_URL: &str = "https://www.googleapis.com/oauth2/v2/userinfo";
+const SCOPE: &str = "https://mail.google.com/ https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/calendar https://www.googleapis.com/auth/contacts.readonly https://www.googleapis.com/auth/contacts.other.readonly";
+
+fn urlencode(s: &str) -> String {
+    let mut out = String::with_capacity(s.len());
+    for b in s.bytes() {
+        match b {
+            b'A'..=b'Z' | b'a'..=b'z' | b'0'..=b'9' | b'-' | b'_' | b'.' | b'~' => out.push(b as char),
+            _ => out.push_str(&format!("%{b:02X}")),
+        }
+    }
+    out
+}
+
+fn percent_decode(s: &str) -> String {
+    let bytes = s.as_bytes();
+    let mut out = Vec::with_capacity(bytes.len());
+    let mut i = 0;
+    while i < bytes.len() {
+        if bytes[i] == b'%' && i + 2 < bytes.len() {
+            if let Ok(byte) = u8::from_str_radix(std::str::from_utf8(&bytes[i + 1..i + 3]).unwrap_or(""), 16) {
+                out.push(byte);
+                i += 3;
+                continue;
+            }
+        }
+        out.push(if bytes[i] == b'+' { b' ' } else { bytes[i] });
+        i += 1;
+    }
+    String::from_utf8_lossy(&out).into_owned()
+}
+
+fn code_verifier() -> String {
+    format!("{}{}", Uuid::new_v4().simple(), Uuid::new_v4().simple())
+}
+
+fn code_challenge(verifier: &str) -> String {
+    let mut hasher = Sha256::new();
+    hasher.update(verifier.as_bytes());
+    base64::engine::general_purpose::URL_SAFE_NO_PAD.encode(hasher.finalize())
+}
+
+struct RedirectResult {
+    code: String,
+}
+
+fn wait_for_redirect(listener: TcpListener) -> AppResult<RedirectResult> {
+    listener.set_nonblocking(true).ok();
+    let deadline = Instant::now() + Duration::from_secs(300);
+    let (mut stream, _) = loop {
+        match listener.accept() {
+            Ok(pair) => break pair,
+            Err(e) if e.kind() == std::io::ErrorKind::WouldBlock => {
+                if Instant::now() > deadline {
+                    return Err(AppError::Other("Zeitüberschreitung beim Google-Login".into()));
+                }
+                std::thread::sleep(Duration::from_millis(200));
+            }
+            Err(e) => return Err(AppError::Other(e.to_string())),
+        }
+    };
+    stream.set_nonblocking(false).ok();
+
+    let mut reader = BufReader::new(stream.try_clone().map_err(|e| AppError::Other(e.to_string()))?);
+    let mut request_line = String::new();
+    reader
+        .read_line(&mut request_line)
+        .map_err(|e| AppError::Other(e.to_string()))?;
+    let path = request_line.split_whitespace().nth(1).unwrap_or("").to_string();
+
+    let body = "<html><body style=\"font-family:sans-serif\"><h2>Fertig! Du kannst dieses Fenster jetzt schließen.</h2></body></html>";
+    let response = format!(
+        "HTTP/1.1 200 OK\r\nContent-Type: text/html; charset=utf-8\r\nContent-Length: {}\r\nConnection: close\r\n\r\n{}",
+        body.len(),
+        body
+    );
+    let _ = stream.write_all(response.as_bytes());
+
+    let query = path.splitn(2, '?').nth(1).unwrap_or("");
+    let mut code = None;
+    let mut error = None;
+    for pair in query.split('&') {
+        let mut it = pair.splitn(2, '=');
+        let key = it.next().unwrap_or("");
+        let value = percent_decode(it.next().unwrap_or(""));
+        match key {
+            "code" => code = Some(value),
+            "error" => error = Some(value),
+            _ => {}
+        }
+    }
+    if let Some(err) = error {
+        return Err(AppError::Other(format!("Google hat den Zugriff verweigert: {err}")));
+    }
+    let code = code.ok_or_else(|| AppError::Other("Kein Autorisierungscode erhalten".into()))?;
+    Ok(RedirectResult { code })
+}
+
+#[derive(Deserialize)]
+struct TokenResponse {
+    access_token: String,
+    #[serde(default)]
+    refresh_token: Option<String>,
+}
+
+fn http_client() -> reqwest::blocking::Client {
+    reqwest::blocking::Client::new()
+}
+
+fn exchange_code(code: &str, verifier: &str, redirect_uri: &str) -> AppResult<TokenResponse> {
+    let resp = http_client()
+        .post(TOKEN_URL)
+        .form(&[
+            ("code", code),
+            ("client_id", CLIENT_ID),
+            ("client_secret", CLIENT_SECRET),
+            ("redirect_uri", redirect_uri),
+            ("grant_type", "authorization_code"),
+            ("code_verifier", verifier),
+        ])
+        .send()
+        .map_err(|e| AppError::Other(e.to_string()))?;
+    if !resp.status().is_success() {
+        return Err(AppError::Other(format!(
+            "Token-Austausch fehlgeschlagen: {}",
+            resp.text().unwrap_or_default()
+        )));
+    }
+    resp.json().map_err(|e| AppError::Other(e.to_string()))
+}
+
+pub fn refresh_access_token(refresh_token: &str) -> AppResult<String> {
+    let resp = http_client()
+        .post(TOKEN_URL)
+        .form(&[
+            ("client_id", CLIENT_ID),
+            ("client_secret", CLIENT_SECRET),
+            ("refresh_token", refresh_token),
+            ("grant_type", "refresh_token"),
+        ])
+        .send()
+        .map_err(|e| AppError::Other(e.to_string()))?;
+    if !resp.status().is_success() {
+        return Err(AppError::Other(format!(
+            "Token-Erneuerung fehlgeschlagen: {}",
+            resp.text().unwrap_or_default()
+        )));
+    }
+    let token: TokenResponse = resp.json().map_err(|e| AppError::Other(e.to_string()))?;
+    Ok(token.access_token)
+}
+
+#[derive(Deserialize)]
+struct UserInfo {
+    email: String,
+}
+
+fn fetch_email(access_token: &str) -> AppResult<String> {
+    let resp = http_client()
+        .get(USERINFO_URL)
+        .bearer_auth(access_token)
+        .send()
+        .map_err(|e| AppError::Other(e.to_string()))?;
+    let info: UserInfo = resp.json().map_err(|e| AppError::Other(e.to_string()))?;
+    Ok(info.email)
+}
+
+/// Runs the full desktop OAuth2 + PKCE login flow for Google: opens the system browser,
+/// waits for the local loopback redirect, exchanges the code for tokens.
+/// Returns (email, refresh_token).
+pub fn run_google_login() -> AppResult<(String, String)> {
+    let listener = TcpListener::bind("127.0.0.1:0").map_err(|e| AppError::Other(e.to_string()))?;
+    let port = listener
+        .local_addr()
+        .map_err(|e| AppError::Other(e.to_string()))?
+        .port();
+    let redirect_uri = format!("http://localhost:{port}");
+
+    let verifier = code_verifier();
+    let challenge = code_challenge(&verifier);
+
+    let auth_url = format!(
+        "{AUTH_URL}?client_id={}&redirect_uri={}&response_type=code&scope={}&code_challenge={}&code_challenge_method=S256&access_type=offline&prompt=consent",
+        urlencode(CLIENT_ID),
+        urlencode(&redirect_uri),
+        urlencode(SCOPE),
+        urlencode(&challenge),
+    );
+
+    webbrowser::open(&auth_url).map_err(|e| AppError::Other(e.to_string()))?;
+
+    let result = wait_for_redirect(listener)?;
+    let token = exchange_code(&result.code, &verifier, &redirect_uri)?;
+    let refresh_token = token.refresh_token.ok_or_else(|| {
+        AppError::Other(
+            "Kein Refresh-Token erhalten. Widerrufe den Zugriff in deinem Google-Konto (myaccount.google.com/permissions) und versuche es erneut.".into(),
+        )
+    })?;
+    let email = fetch_email(&token.access_token)?;
+    Ok((email, refresh_token))
+}
diff --git a/src-tauri/src/pop3_client.rs b/src-tauri/src/pop3_client.rs
new file mode 100644
index 0000000..6b6d93b
--- /dev/null
+++ b/src-tauri/src/pop3_client.rs
@@ -0,0 +1,176 @@
+use crate::error::{AppError, AppResult};
+use crate::mailutil::{parse_message_full, split_from, thread_ids};
+use crate::models::{MessageFull, MessageSummary};
+use mailparse::{parse_mail, MailHeaderMap};
+use native_tls::TlsStream;
+use std::io::{BufRead, BufReader, Write};
+use std::net::TcpStream;
+
+pub struct Pop3Session {
+    stream: BufReader<TlsStream<TcpStream>>,
+}
+
+fn read_line(stream: &mut BufReader<TlsStream<TcpStream>>) -> AppResult<String> {
+    let mut line = String::new();
+    stream
+        .read_line(&mut line)
+        .map_err(|e| AppError::Pop3(e.to_string()))?;
+    Ok(line)
+}
+
+fn expect_ok(stream: &mut BufReader<TlsStream<TcpStream>>) -> AppResult<String> {
+    let line = read_line(stream)?;
+    if !line.starts_with("+OK") {
+        return Err(AppError::Pop3(format!("server said: {}", line.trim())));
+    }
+    Ok(line)
+}
+
+fn send_cmd(stream: &mut BufReader<TlsStream<TcpStream>>, cmd: &str) -> AppResult<()> {
+    stream
+        .get_mut()
+        .write_all(format!("{cmd}\r\n").as_bytes())
+        .map_err(|e| AppError::Pop3(e.to_string()))
+}
+
+fn read_multiline(stream: &mut BufReader<TlsStream<TcpStream>>) -> AppResult<Vec<u8>> {
+    let mut out = Vec::new();
+    loop {
+        let mut line = Vec::new();
+        let n = stream
+            .read_until(b'\n', &mut line)
+            .map_err(|e| AppError::Pop3(e.to_string()))?;
+        if n == 0 {
+            break;
+        }
+        if line == b".\r\n" || line == b".\n" {
+            break;
+        }
+        if line.starts_with(b"..") {
+            out.extend_from_slice(&line[1..]);
+        } else {
+            out.extend_from_slice(&line);
+        }
+    }
+    Ok(out)
+}
+
+pub fn connect(host: &str, port: u16, username: &str, password: &str) -> AppResult<Pop3Session> {
+    let connector = native_tls::TlsConnector::new().map_err(|e| AppError::Pop3(e.to_string()))?;
+    let tcp = TcpStream::connect((host, port)).map_err(|e| AppError::Pop3(e.to_string()))?;
+    let tls = connector
+        .connect(host, tcp)
+        .map_err(|e| AppError::Pop3(e.to_string()))?;
+    let mut stream = BufReader::new(tls);
+    expect_ok(&mut stream)?;
+    send_cmd(&mut stream, &format!("USER {username}"))?;
+    expect_ok(&mut stream)?;
+    send_cmd(&mut stream, &format!("PASS {password}"))?;
+    expect_ok(&mut stream)?;
+    Ok(Pop3Session { stream })
+}
+
+impl Pop3Session {
+    fn list_ids(&mut self) -> AppResult<Vec<u32>> {
+        send_cmd(&mut self.stream, "LIST")?;
+        expect_ok(&mut self.stream)?;
+        let mut ids = Vec::new();
+        loop {
+            let line = read_line(&mut self.stream)?;
+            if line.trim() == "." {
+                break;
+            }
+            if let Some(num_str) = line.split_whitespace().next() {
+                if let Ok(num) = num_str.parse::<u32>() {
+                    ids.push(num);
+                }
+            }
+        }
+        Ok(ids)
+    }
+
+    pub fn list_messages(&mut self, account_id: &str) -> AppResult<Vec<MessageSummary>> {
+        let mut ids = self.list_ids()?;
+        ids.sort_unstable();
+        ids.reverse();
+        ids.truncate(60);
+
+        let mut out = Vec::new();
+        for id in ids {
+            send_cmd(&mut self.stream, &format!("TOP {id} 0"))?;
+            let ok = expect_ok(&mut self.stream);
+            if ok.is_err() {
+                continue;
+            }
+            let header_bytes = read_multiline(&mut self.stream)?;
+            let parsed = parse_mail(&header_bytes).ok();
+            let from_raw = parsed
+                .as_ref()
+                .and_then(|p| p.headers.get_first_value("From"))
+                .unwrap_or_default();
+            let (from_name, from_addr) = split_from(&from_raw);
+            let subject = parsed
+                .as_ref()
+                .and_then(|p| p.headers.get_first_value("Subject"))
+                .unwrap_or_else(|| "(kein Betreff)".to_string());
+            let date_raw = parsed
+                .as_ref()
+                .and_then(|p| p.headers.get_first_value("Date"))
+                .unwrap_or_default();
+            let timestamp = mailparse::dateparse(&date_raw).unwrap_or(0);
+            let (message_id, thread_id) = thread_ids(parsed.as_ref(), &format!("{account_id}-INBOX-{id}"));
+
+            out.push(MessageSummary {
+                uid: id,
+                account_id: account_id.to_string(),
+                folder: "INBOX".to_string(),
+                from_name,
+                from_addr,
+                subject,
+                date: date_raw,
+                timestamp,
+                snippet: String::new(),
+                is_read: true,
+                has_attachments: false,
+                flagged: false,
+                message_id,
+                thread_id,
+                category: None,
+            });
+        }
+        Ok(out)
+    }
+
+    pub fn retr_raw(&mut self, id: u32) -> AppResult<Vec<u8>> {
+        send_cmd(&mut self.stream, &format!("RETR {id}"))?;
+        expect_ok(&mut self.stream)?;
+        read_multiline(&mut self.stream)
+    }
+
+    pub fn fetch_full(&mut self, account_id: &str, id: u32) -> AppResult<MessageFull> {
+        let raw = self.retr_raw(id)?;
+        parse_message_full(account_id, "INBOX", id, &raw)
+    }
+
+    pub fn export_all(&mut self, account_id: &str) -> AppResult<Vec<Vec<u8>>> {
+        let summaries = self.list_messages(account_id)?;
+        let mut out = Vec::new();
+        for s in summaries {
+            if let Ok(raw) = self.retr_raw(s.uid) {
+                out.push(raw);
+            }
+        }
+        Ok(out)
+    }
+
+    pub fn delete(&mut self, id: u32) -> AppResult<()> {
+        send_cmd(&mut self.stream, &format!("DELE {id}"))?;
+        expect_ok(&mut self.stream)?;
+        Ok(())
+    }
+
+    pub fn quit(&mut self) {
+        let _ = send_cmd(&mut self.stream, "QUIT");
+        let _ = expect_ok(&mut self.stream);
+    }
+}
diff --git a/src-tauri/src/recurrence.rs b/src-tauri/src/recurrence.rs
new file mode 100644
index 0000000..d4bc9d6
--- /dev/null
+++ b/src-tauri/src/recurrence.rs
@@ -0,0 +1,125 @@
+use chrono::{DateTime, Datelike, Duration, NaiveDate, TimeZone, Utc};
+
+/// Safety cap on generated occurrences per expansion call, so an unbounded
+/// (no UNTIL) daily/weekly series can never spin forever.
+const MAX_OCCURRENCES: usize = 730;
+
+enum Freq {
+    Daily,
+    Weekly,
+    Monthly,
+    Yearly,
+}
+
+struct Rule {
+    freq: Freq,
+    interval: i64,
+    until: Option<i64>,
+}
+
+/// Parses a minimal RFC5545-flavored RRULE string as produced by our own UI:
+/// `FREQ=DAILY|WEEKLY|MONTHLY|YEARLY[;INTERVAL=n][;UNTIL=YYYYMMDD]`.
+///
+/// Deliberately returns `None` (falling back to a single occurrence) for any
+/// recognized-but-unsupported RRULE part (BYDAY, BYMONTHDAY, COUNT, ...) instead of
+/// silently ignoring it — this matters once CalDAV brings in RRULEs from other
+/// clients (a phone calendar app, Nextcloud's web UI) that this hand-rolled expander
+/// was never built to interpret correctly. Showing just the first occurrence is a
+/// far safer wrong answer than generating occurrences at the wrong times.
+fn parse(rrule: &str) -> Option<Rule> {
+    let mut freq = None;
+    let mut interval = 1i64;
+    let mut until = None;
+    for part in rrule.split(';') {
+        let mut it = part.splitn(2, '=');
+        let key = it.next()?.trim();
+        let val = it.next().unwrap_or("").trim();
+        match key {
+            "FREQ" => {
+                freq = Some(match val {
+                    "DAILY" => Freq::Daily,
+                    "WEEKLY" => Freq::Weekly,
+                    "MONTHLY" => Freq::Monthly,
+                    "YEARLY" => Freq::Yearly,
+                    _ => return None,
+                })
+            }
+            "INTERVAL" => interval = val.parse().unwrap_or(1),
+            "UNTIL" => {
+                let date_part = &val[..val.len().min(8)];
+                if let Ok(d) = NaiveDate::parse_from_str(date_part, "%Y%m%d") {
+                    if let Some(dt) = d.and_hms_opt(23, 59, 59) {
+                        until = Some(Utc.from_utc_datetime(&dt).timestamp());
+                    }
+                }
+            }
+            "BYDAY" | "BYMONTHDAY" | "BYMONTH" | "BYSETPOS" | "BYYEARDAY" | "BYWEEKNO" | "COUNT" | "WKST" => {
+                return None;
+            }
+            _ => {}
+        }
+    }
+    Some(Rule {
+        freq: freq?,
+        interval: interval.max(1),
+        until,
+    })
+}
+
+fn last_day_of_month(year: i32, month: u32) -> u32 {
+    let (ny, nm) = if month == 12 { (year + 1, 1) } else { (year, month + 1) };
+    NaiveDate::from_ymd_opt(ny, nm, 1)
+        .and_then(|d| d.pred_opt())
+        .map(|d| d.day())
+        .unwrap_or(28)
+}
+
+fn add_months(dt: DateTime<Utc>, months: i64) -> DateTime<Utc> {
+    let naive = dt.naive_utc();
+    let date = naive.date();
+    let total_months = i64::from(date.year()) * 12 + i64::from(date.month0()) + months;
+    let new_year = total_months.div_euclid(12) as i32;
+    let new_month = total_months.rem_euclid(12) as u32 + 1;
+    let new_day = date.day().min(last_day_of_month(new_year, new_month));
+    let Some(new_date) = NaiveDate::from_ymd_opt(new_year, new_month, new_day) else {
+        return dt;
+    };
+    Utc.from_utc_datetime(&new_date.and_time(naive.time()))
+}
+
+/// Expands a recurring event's occurrences overlapping `[range_start, range_end)`,
+/// skipping any occurrence whose start matches an entry in `exdates` (single
+/// occurrences deleted or overridden out of the series). Falls back to the single
+/// base occurrence if `rrule` is unparseable.
+pub fn expand(base_start: i64, base_end: i64, rrule: &str, range_start: i64, range_end: i64, exdates: &[i64]) -> Vec<(i64, i64)> {
+    let Some(rule) = parse(rrule) else {
+        return vec![(base_start, base_end)];
+    };
+    let duration = base_end - base_start;
+    let Some(mut current) = Utc.timestamp_opt(base_start, 0).single() else {
+        return vec![(base_start, base_end)];
+    };
+
+    let mut out = Vec::new();
+    let mut n = 0;
+    while current.timestamp() < range_end && n < MAX_OCCURRENCES {
+        if let Some(until) = rule.until {
+            if current.timestamp() > until {
+                break;
+            }
+        }
+        let occ_start = current.timestamp();
+        let occ_end = occ_start + duration;
+        if occ_end > range_start && occ_start < range_end && !exdates.contains(&occ_start) {
+            out.push((occ_start, occ_end));
+        }
+        current = match rule.freq {
+            Freq::Daily => current + Duration::days(rule.interval),
+            Freq::Weekly => current + Duration::weeks(rule.interval),
+            Freq::Monthly => add_months(current, rule.interval),
+            Freq::Yearly => add_months(current, rule.interval * 12),
+        };
+        n += 1;
+    }
+    out
+}
diff --git a/src-tauri/src/reminders.rs b/src-tauri/src/reminders.rs
new file mode 100644
index 0000000..978fa58
--- /dev/null
+++ b/src-tauri/src/reminders.rs
@@ -0,0 +1,70 @@
+use crate::db::Db;
+use chrono::TimeZone;
+use std::collections::HashSet;
+use std::sync::Mutex;
+use std::time::Duration;
+use tauri::{AppHandle, Manager};
+use tauri_plugin_notification::NotificationExt;
+
+const POLL_INTERVAL_SECS: u64 = 30;
+/// Only fire a reminder whose trigger moment is this recent — avoids a flood of
+/// stale notifications for reminders that elapsed while the app was closed.
+const FRESHNESS_WINDOW_SECS: i64 = 300;
+const LOOKAHEAD_SECS: i64 = 2 * 86400;
+
+pub fn spawn_poller(app: AppHandle) {
+    tauri::async_runtime::spawn(async move {
+        let notified: Mutex<HashSet<String>> = Mutex::new(HashSet::new());
+        let mut interval = tokio::time::interval(Duration::from_secs(POLL_INTERVAL_SECS));
+        loop {
+            interval.tick().await;
+            poll_once(&app, &notified);
+        }
+    });
+}
+
+fn poll_once(app: &AppHandle, notified: &Mutex<HashSet<String>>) {
+    let db = app.state::<Db>();
+    let Ok(events) = db.list_events_with_reminders() else { return };
+    let now = chrono::Utc::now().timestamp();
+
+    for base in events {
+        let Some(reminder_min) = base.reminder_minutes else { continue };
+        let occurrences = if let Some(rule) = &base.rrule {
+            let exdates: Vec<i64> = base.exdates.as_deref().unwrap_or("").split(',').filter_map(|s| s.trim().parse().ok()).collect();
+            crate::recurrence::expand(base.start_ts, base.end_ts, rule, now - 3600, now + LOOKAHEAD_SECS, &exdates)
+        } else {
+            vec![(base.start_ts, base.end_ts)]
+        };
+
+        for (occ_start, _) in occurrences {
+            let trigger_ts = occ_start - i64::from(reminder_min) * 60;
+            if trigger_ts > now || now - trigger_ts >= FRESHNESS_WINDOW_SECS {
+                continue;
+            }
+            let key = format!("{}#{}", base.id, occ_start);
+            {
+                let mut set = notified.lock().unwrap();
+                if !set.insert(key) {
+                    continue;
+                }
+            }
+            let when = chrono::Local
+                .timestamp_opt(occ_start, 0)
+                .single()
+                .map(|d| d.format("um %H:%M").to_string())
+                .unwrap_or_default();
+            let body = if base.all_day {
+                "Heute".to_string()
+            } else {
+                format!("Beginnt {when}")
+            };
+            let _ = app
+                .notification()
+                .builder()
+                .title(format!("Erinnerung: {}", base.title))
+                .body(body)
+                .show();
+        }
+    }
+}
diff --git a/src-tauri/src/smtp_client.rs b/src-tauri/src/smtp_client.rs
new file mode 100644
index 0000000..78dd769
--- /dev/null
+++ b/src-tauri/src/smtp_client.rs
@@ -0,0 +1,121 @@
+use crate::accounts;
+use crate::error::{AppError, AppResult};
+use crate::models::{Account, AuthMethod, ComposeMessage};
+use crate::oauth;
+use base64::Engine;
+use lettre::message::header::{HeaderName, HeaderValue};
+use lettre::message::{Attachment, MultiPart};
+use lettre::transport::smtp::authentication::{Credentials, Mechanism};
+use lettre::{AsyncSmtpTransport, AsyncTransport, Message, Tokio1Executor};
+
+fn strip_html(html: &str) -> String {
+    let mut out = String::with_capacity(html.len());
+    let mut in_tag = false;
+    for c in html.chars() {
+        match c {
+            '<' => in_tag = true,
+            '>' => in_tag = false,
+            _ if !in_tag => out.push(c),
+            _ => {}
+        }
+    }
+    out
+}
+
+fn resolve_credentials(account: &Account) -> AppResult<(Credentials, Option<Vec<Mechanism>>)> {
+    match account.auth_method {
+        AuthMethod::Password => {
+            let password = accounts::get_password(&account.id)?;
+            Ok((Credentials::new(account.username.clone(), password), None))
+        }
+        AuthMethod::GoogleOauth => {
+            let refresh_token = accounts::get_password(&account.id)?;
+            let access_token = oauth::refresh_access_token(&refresh_token)?;
+            Ok((
+                Credentials::new(account.email.clone(), access_token),
+                Some(vec![Mechanism::Xoauth2]),
+            ))
+        }
+    }
+}
+
+pub async fn send(account: &Account, msg: ComposeMessage) -> AppResult<()> {
+    let account_owned = account.clone();
+    let (creds, mechanisms) = tauri::async_runtime::spawn_blocking(move || resolve_credentials(&account_owned))
+        .await
+        .map_err(|e| AppError::Other(e.to_string()))??;
+
+    let mut builder = if account.smtp_starttls {
+        AsyncSmtpTransport::<Tokio1Executor>::starttls_relay(&account.smtp_host)
+            .map_err(|e| AppError::Smtp(e.to_string()))?
+    } else {
+        AsyncSmtpTransport::<Tokio1Executor>::relay(&account.smtp_host)
+            .map_err(|e| AppError::Smtp(e.to_string()))?
+    }
+    .port(account.smtp_port)
+    .credentials(creds);
+    if let Some(mechanisms) = mechanisms {
+        builder = builder.authentication(mechanisms);
+    }
+    let mailer: AsyncSmtpTransport<Tokio1Executor> = builder.build();
+
+    let mut builder = Message::builder()
+        .from(account.email.parse().map_err(|e: lettre::address::AddressError| AppError::Smtp(e.to_string()))?)
+        .to(msg.to.parse().map_err(|e: lettre::address::AddressError| AppError::Smtp(e.to_string()))?)
+        .subject(msg.subject.clone());
+
+    if let Some(cc) = msg.cc.filter(|s| !s.trim().is_empty()) {
+        builder = builder.cc(cc.parse().map_err(|e: lettre::address::AddressError| AppError::Smtp(e.to_string()))?);
+    }
+    if let Some(bcc) = msg.bcc.filter(|s| !s.trim().is_empty()) {
+        builder = builder.bcc(bcc.parse().map_err(|e: lettre::address::AddressError| AppError::Smtp(e.to_string()))?);
+    }
+    if let Some(ref_id) = msg.in_reply_to.filter(|s| !s.trim().is_empty()) {
+        builder = builder.in_reply_to(ref_id);
+    }
+    if let Some(reply_to) = msg.reply_to.filter(|s| !s.trim().is_empty()) {
+        builder = builder.reply_to(reply_to.parse().map_err(|e: lettre::address::AddressError| AppError::Smtp(e.to_string()))?);
+    }
+    if msg.request_read_receipt {
+        if let Ok(name) = HeaderName::new_from_ascii("Disposition-Notification-To".to_string()) {
+            builder = builder.raw_header(HeaderValue::new(name, account.email.clone()));
+        }
+    }
+    if let Some(importance) = msg.importance.as_deref() {
+        let (priority, importance_word) = match importance {
+            "high" => ("1", "high"),
+            "low" => ("5", "low"),
+            _ => ("3", "normal"),
+        };
+        if let Ok(name) = HeaderName::new_from_ascii("X-Priority".to_string()) {
+            builder = builder.raw_header(HeaderValue::new(name, priority.to_string()));
+        }
+        if let Ok(name) = HeaderName::new_from_ascii("Importance".to_string()) {
+            builder = builder.raw_header(HeaderValue::new(name, importance_word.to_string()));
+        }
+    }
+
+    let plain = strip_html(&msg.body_html);
+    let mut mixed = MultiPart::mixed().multipart(MultiPart::alternative_plain_html(plain, msg.body_html.clone()));
+
+    for att in msg.attachments {
+        let bytes = base64::engine::general_purpose::STANDARD
+            .decode(att.content_base64.as_bytes())
+            .map_err(|e| AppError::Smtp(format!("invalid attachment data: {e}")))?;
+        let content_type = att
+            .mime_type
+            .parse()
+            .map_err(|_| AppError::Smtp("invalid attachment mime type".into()))?;
+        mixed = mixed.singlepart(Attachment::new(att.filename).body(bytes, content_type));
+    }
+
+    let email = builder
+        .multipart(mixed)
+        .map_err(|e| AppError::Smtp(e.to_string()))?;
+
+    mailer
+        .send(email)
+        .await
+        .map_err(|e| AppError::Smtp(e.to_string()))?;
+    Ok(())
+}
diff --git a/src-tauri/src/vcard.rs b/src-tauri/src/vcard.rs
new file mode 100644
index 0000000..ed071d4
--- /dev/null
+++ b/src-tauri/src/vcard.rs
@@ -0,0 +1,85 @@
+use crate::models::Contact;
+
+fn escape(s: &str) -> String {
+    s.replace('\\', "\\\\")
+        .replace(',', "\\,")
+        .replace(';', "\\;")
+        .replace('\n', "\\n")
+}
+
+pub fn export(contacts: &[Contact]) -> String {
+    let mut out = String::new();
+    for c in contacts {
+        out.push_str("BEGIN:VCARD\r\nVERSION:3.0\r\n");
+        out.push_str(&format!("FN:{}\r\n", escape(&c.name)));
+        if let Some(email) = c.email.as_ref().filter(|s| !s.is_empty()) {
+            out.push_str(&format!("EMAIL;TYPE=INTERNET:{}\r\n", escape(email)));
+        }
+        if let Some(phone) = c.phone.as_ref().filter(|s| !s.is_empty()) {
+            out.push_str(&format!("TEL:{}\r\n", escape(phone)));
+        }
+        if let Some(address) = c.address.as_ref().filter(|s| !s.is_empty()) {
+            out.push_str(&format!("ADR:;;{};;;;\r\n", escape(address)));
+        }
+        if let Some(company) = c.company.as_ref().filter(|s| !s.is_empty()) {
+            out.push_str(&format!("ORG:{}\r\n", escape(company)));
+        }
+        if let Some(notes) = c.notes.as_ref().filter(|s| !s.is_empty()) {
+            out.push_str(&format!("NOTE:{}\r\n", escape(notes)));
+        }
+        out.push_str("END:VCARD\r\n");
+    }
+    out
+}
+
+pub struct ParsedCard {
+    pub name: String,
+    pub email: String,
+    pub company: Option<String>,
+    pub notes: Option<String>,
+}
+
+fn unescape(s: &str) -> String {
+    s.replace("\\n", "\n")
+        .replace("\\,", ",")
+        .replace("\\;", ";")
+        .replace("\\\\", "\\")
+}
+
+pub fn parse(data: &str) -> Vec<ParsedCard> {
+    let mut out = Vec::new();
+    let mut name = String::new();
+    let mut email = String::new();
+    let mut company: Option<String> = None;
+    let mut notes: Option<String> = None;
+
+    for raw_line in data.lines() {
+        let line = raw_line.trim_end_matches('\r');
+        if line.eq_ignore_ascii_case("BEGIN:VCARD") {
+            name.clear();
+            email.clear();
+            company = None;
+            notes = None;
+        } else if let Some(v) = line.strip_prefix("FN:") {
+            name = unescape(v);
+        } else if line.to_uppercase().starts_with("EMAIL") {
+            if let Some(idx) = line.find(':') {
+                email = unescape(&line[idx + 1..]);
+            }
+        } else if let Some(v) = line.strip_prefix("ORG:") {
+            company = Some(unescape(v));
+        } else if let Some(v) = line.strip_prefix("NOTE:") {
+            notes = Some(unescape(v));
+        } else if line.eq_ignore_ascii_case("END:VCARD") {
+            if !email.is_empty() {
+                out.push(ParsedCard {
+                    name: if name.is_empty() { email.clone() } else { name.clone() },
+                    email: email.clone(),
+                    company: company.clone(),
+                    notes: notes.clone(),
+                });
+            }
+        }
+    }
+    out
+}
diff --git a/src-tauri/tauri.conf.json b/src-tauri/tauri.conf.json
new file mode 100644
index 0000000..7ea013b
--- /dev/null
+++ b/src-tauri/tauri.conf.json
@@ -0,0 +1,42 @@
+{
+  "$schema": "../node_modules/@tauri-apps/cli/config.schema.json",
+  "productName": "mail-client",
+  "version": "0.1.0",
+  "identifier": "com.mailclient.app",
+  "build": {
+    "frontendDist": "../dist",
+    "devUrl": "http://localhost:1420",
+    "beforeDevCommand": "npm run dev",
+    "beforeBuildCommand": "npm run build"
+  },
+  "app": {
+    "windows": [
+      {
+        "title": "Mail Client",
+        "width": 1400,
+        "height": 900,
+        "minWidth": 960,
+        "minHeight": 600,
+        "resizable": true,
+        "fullscreen": false
+      }
+    ],
+    "security": {
+      "csp": null
+    }
+  },
+  "bundle": {
+    "active": true,
+    "targets": "all",
+    "icon": [
+      "icons/32x32.png",
+      "icons/128x128.png",
+      "icons/128x128@2x.png",
+      "icons/icon.icns",
+      "icons/icon.ico"
+    ],
+    "android": {
+      "debugApplicationIdSuffix": ".debug"
+    }
+  }
+}
diff --git a/src/App.tsx b/src/App.tsx
new file mode 100644
index 0000000..34ba64e
--- /dev/null
+++ b/src/App.tsx
@@ -0,0 +1,2069 @@
+import { useCallback, useEffect, useRef, useState } from 'react'
+import { emitTo, listen } from '@tauri-apps/api/event'
+import { WebviewWindow } from '@tauri-apps/api/webviewWindow'
+import { open, save } from '@tauri-apps/plugin-dialog'
+import {
+  BellRing,
+  FolderInput,
+  FolderPlus,
+  ListTodo,
+  Mail,
+  MailOpen,
+  Pencil,
+  ShieldOff,
+  Star,
+  Tag,
+  Trash2,
+} from 'lucide-react'
+import { ContextMenu, useContextMenu, type ContextMenuSection } from './components/ContextMenu'
+import { CATEGORY_COLORS } from './lib/categories'
+import { Sidebar, type FavoriteFolder, type SavedSearch, type SidebarView } from './components/Sidebar'
+import { Ribbon, type EmailFilter, type SortBy } from './components/Ribbon'
+import { MessageList } from './components/MessageList'
+import { ReadingPane } from './components/ReadingPane'
+import { ComposePane, type ComposeInitial } from './components/ComposePane'
+import { AccountModal } from './components/AccountModal'
+import { AccountSettingsModal } from './components/AccountSettingsModal'
+import { ContactsView } from './components/ContactsView'
+import { ContactModal } from './components/ContactModal'
+import { ContactGroupModal } from './components/ContactGroupModal'
+import { ImportModal } from './components/ImportModal'
+import { RulesModal } from './components/RulesModal'
+import { BlockedSendersModal } from './components/BlockedSendersModal'
+import { SnoozedModal } from './components/SnoozedModal'
+import { CalendarView } from './components/CalendarView'
+import { EventModal } from './components/EventModal'
+import { RecurrenceScopeModal } from './components/RecurrenceScopeModal'
+import { CaldavModal } from './components/CaldavModal'
+import { TasksView } from './components/TasksView'
+import { TaskModal } from './components/TaskModal'
+import { SettingsModal } from './components/SettingsModal'
+import { ShortcutsModal } from './components/ShortcutsModal'
+import { NewMailPopup, type NewMailNotification } from './components/NewMailPopup'
+import { UndoSendBanner } from './components/UndoSendBanner'
+import { api } from './lib/api'
+import { parseAddressList } from './lib/addresses'
+import { escapeHtml } from './lib/richtext'
+import { loadAppSettings, saveAppSettings, type AppSettings } from './lib/settings'
+import {
+  applyTheme,
+  loadConversationsEnabled,
+  loadDensity,
+  loadFavoritesRaw,
+  loadTheme,
+  saveConversationsEnabled,
+  saveDensity,
+  saveFavoritesRaw,
+  saveTheme,
+  type Density,
+  type Theme,
+} from './lib/theme'
+import type {
+  Account,
+  AdvancedSearchFilters,
+  CaldavAccount,
+  ComposeMessage,
+  Contact,
+  ContactGroup,
+  Event as CalendarEvent,
+  Folder,
+  InviteResponse,
+  MessageFull,
+  MessageSummary,
+  NewAccount,
+  NewContact,
+  NewContactGroup,
+  NewEvent,
+  NewTask,
+  OutgoingAttachment,
+  Task,
+} from './types'
+
+function monthGridRange(monthDate: Date): [number, number] {
+  const first = new Date(monthDate.getFullYear(), monthDate.getMonth(), 1)
+  const mondayOffset = (first.getDay() + 6) % 7
+  const gridStart = new Date(first)
+  gridStart.setDate(first.getDate() - mondayOffset)
+  const gridEnd = new Date(gridStart)
+  gridEnd.setDate(gridStart.getDate() + 42)
+  return [Math.floor(gridStart.getTime() / 1000), Math.floor(gridEnd.getTime() / 1000)]
+}
+
+function pickDefaultFolder(folders: Folder[]): string | null {
+  if (folders.length === 0) return null
+  const inbox = folders.find((f) => f.name.toLowerCase().includes('inbox') || f.display_name.toLowerCase().includes('posteingang'))
+  return (inbox ?? folders[0]).name
+}
+
+const DRAFTS_FOLDER = 'Entwürfe'
+const LOCAL_ACCOUNT_ID = 'local'
+const SAVED_SEARCHES_KEY = 'mailclient.savedSearches'
+
+function loadSavedSearches(): SavedSearch[] {
+  try {
+    const raw = localStorage.getItem(SAVED_SEARCHES_KEY)
+    return raw ? (JSON.parse(raw) as SavedSearch[]) : []
+  } catch {
+    return []
+  }
+}
+
+function persistSavedSearches(v: SavedSearch[]) {
+  localStorage.setItem(SAVED_SEARCHES_KEY, JSON.stringify(v))
+}
+
+interface PendingSend {
+  id: string
+  deadline: number
+  draftUid: number | null
+  accountId: string
+}
+
+function applyEmailFilter(messages: MessageSummary[], filter: EmailFilter): MessageSummary[] {
+  switch (filter) {
+    case 'unread':
+      return messages.filter((m) => !m.is_read)
+    case 'flagged':
+      return messages.filter((m) => m.flagged)
+    case 'attachments':
+      return messages.filter((m) => m.has_attachments)
+    default:
+      return messages
+  }
+}
+
+function prefixSubject(subject: string, prefix: string) {
+  return subject.toLowerCase().startsWith(prefix.toLowerCase()) ? subject : `${prefix} ${subject}`
+}
+
+function messageBodyAsHtml(m: MessageFull) {
+  return m.body_html ?? (m.body_text ? escapeHtml(m.body_text).replace(/\n/g, '<br>') : '')
+}
+
+function quoteBody(m: MessageFull) {
+  return `<br><br><p>Am ${escapeHtml(m.date)} schrieb ${escapeHtml(m.from_name || m.from_addr)}:</p><blockquote>${messageBodyAsHtml(m)}</blockquote>`
+}
+
+function isEditableTarget(el: EventTarget | null) {
+  if (!(el instanceof HTMLElement)) return false
+  return el.tagName === 'INPUT' || el.tagName === 'TEXTAREA' || el.isContentEditable
+}
+
+function keyOf(m: MessageSummary) {
+  return `${m.account_id}-${m.folder}-${m.uid}`
+}
+
+export default function App() {
+  const [accounts, setAccounts] = useState<Account[]>([])
+  const [accountFolders, setAccountFolders] = useState<Record<string, Folder[]>>({})
+  const [expandedAccounts, setExpandedAccounts] = useState<Set<string>>(new Set())
+  const [favorites, setFavorites] = useState<FavoriteFolder[]>(() => loadFavoritesRaw<FavoriteFolder>())
+
+  const [selectedAccountId, setSelectedAccountId] = useState<string | null>(null)
+  const [selectedFolder, setSelectedFolder] = useState<string | null>(null)
+  const [messages, setMessages] = useState<MessageSummary[]>([])
+  const [selectedMessage, setSelectedMessage] = useState<MessageFull | null>(null)
+  const [selectedKeys, setSelectedKeys] = useState<Set<string>>(new Set())
+  const anchorIndexRef = useRef<number | null>(null)
+  const { menuState, openMenu, closeMenu } = useContextMenu()
+  const draggedMessagesRef = useRef<MessageSummary[]>([])
+
+  const [searchQuery, setSearchQuery] = useState('')
+  const [searchResults, setSearchResults] = useState<MessageSummary[]>([])
+  const [searching, setSearching] = useState(false)
+  const [advancedSearch, setAdvancedSearch] = useState<AdvancedSearchFilters>({
+    from: '',
+    dateFrom: '',
+    dateTo: '',
+    hasAttachment: false,
+  })
+  const hasAdvancedFilters = !!(
+    advancedSearch.from.trim() ||
+    advancedSearch.dateFrom ||
+    advancedSearch.dateTo ||
+    advancedSearch.hasAttachment
+  )
+
+  const [loadingMessages, setLoadingMessages] = useState(false)
+  const [loadingMessage, setLoadingMessage] = useState(false)
+  const [refreshing, setRefreshing] = useState(false)
+
+  const [accountModalOpen, setAccountModalOpen] = useState(false)
+  const [settingsAccount, setSettingsAccount] = useState<Account | null>(null)
+  const [composing, setComposing] = useState(false)
+  const [composeInitial, setComposeInitial] = useState<ComposeInitial | null>(null)
+  const [composeAccountId, setComposeAccountId] = useState<string | null>(null)
+  const [currentDraftUid, setCurrentDraftUid] = useState<number | null>(null)
+  const [sending, setSending] = useState(false)
+  const [toast, setToast] = useState<string | null>(null)
+
+  const [view, setView] = useState<SidebarView>('mail')
+  const [contacts, setContacts] = useState<Contact[]>([])
+  const [loadingContacts, setLoadingContacts] = useState(false)
+  const [contactModalOpen, setContactModalOpen] = useState(false)
+  const [editingContact, setEditingContact] = useState<Contact | null>(null)
+  const [importModalOpen, setImportModalOpen] = useState(false)
+  const [rulesModalOpen, setRulesModalOpen] = useState(false)
+  const [blockedSendersModalOpen, setBlockedSendersModalOpen] = useState(false)
+  const [snoozedModalOpen, setSnoozedModalOpen] = useState(false)
+
+  const [unifiedInbox, setUnifiedInbox] = useState(false)
+  const [unifiedMessages, setUnifiedMessages] = useState<MessageSummary[]>([])
+
+  const [contactGroups, setContactGroups] = useState<ContactGroup[]>([])
+  const [contactGroupModalOpen, setContactGroupModalOpen] = useState(false)
+
+  const [tasks, setTasks] = useState<Task[]>([])
+  const [loadingTasks, setLoadingTasks] = useState(false)
+  const [taskModalOpen, setTaskModalOpen] = useState(false)
+  const [editingTask, setEditingTask] = useState<Task | null>(null)
+
+  const [monthDate, setMonthDate] = useState(() => new Date())
+  const [events, setEvents] = useState<CalendarEvent[]>([])
+  const [loadingEvents, setLoadingEvents] = useState(false)
+  const [eventModalOpen, setEventModalOpen] = useState(false)
+  const [caldavAccounts, setCaldavAccounts] = useState<CaldavAccount[]>([])
+  const [caldavModalOpen, setCaldavModalOpen] = useState(false)
+  const [editingEvent, setEditingEvent] = useState<CalendarEvent | null>(null)
+  const [editingOccurrenceStart, setEditingOccurrenceStart] = useState<number | null>(null)
+  const [recurrenceScopeTarget, setRecurrenceScopeTarget] = useState<{ event: CalendarEvent; action: 'edit' | 'delete' } | null>(
+    null,
+  )
+  const [eventDefaultDate, setEventDefaultDate] = useState<Date | null>(null)
+
+  const [theme, setTheme] = useState<Theme>(() => loadTheme())
+  const [density, setDensity] = useState<Density>(() => loadDensity())
+  const [groupConversations, setGroupConversations] = useState(() => loadConversationsEnabled())
+
+  const [offlineMode, setOfflineMode] = useState(false)
+  const [sidebarCollapsed, setSidebarCollapsed] = useState(false)
+  const [sortBy, setSortBy] = useState<SortBy>('date')
+  const [sortDesc, setSortDesc] = useState(true)
+  const [emailFilter, setEmailFilter] = useState<EmailFilter>('none')
+  const [savedSearches, setSavedSearches] = useState<SavedSearch[]>(() => loadSavedSearches())
+
+  const [settingsModalOpen, setSettingsModalOpen] = useState(false)
+  const [shortcutsModalOpen, setShortcutsModalOpen] = useState(false)
+  const [notifySettings, setAppSettings] = useState<AppSettings>(() => loadAppSettings())
+  const [newMailNotification, setNewMailNotification] = useState<NewMailNotification | null>(null)
+  const [pendingSend, setPendingSend] = useState<PendingSend | null>(null)
+
+  const showToast = useCallback((msg: string) => {
+    setToast(msg)
+    setTimeout(() => setToast(null), 3500)
+  }, [])
+
+  useEffect(() => {
+    applyTheme(theme)
+    if (theme !== 'system') return
+    const mq = window.matchMedia('(prefers-color-scheme: dark)')
+    const listener = () => applyTheme('system')
+    mq.addEventListener('change', listener)
+    return () => mq.removeEventListener('change', listener)
+  }, [theme])
+
+  useEffect(() => {
+    setCurrentDraftUid(composeInitial?.draftUid ?? null)
+  }, [composeInitial])
+
+  function handleThemeChange(t: Theme) {
+    setTheme(t)
+    saveTheme(t)
+  }
+
+  function handleDensityChange(d: Density) {
+    setDensity(d)
+    saveDensity(d)
+  }
+
+  function handleGroupConversationsChange(v: boolean) {
+    setGroupConversations(v)
+    saveConversationsEnabled(v)
+  }
+
+  useEffect(() => {
+    api.setDesktopNotificationsEnabled(notifySettings.desktop).catch(() => {})
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [])
+
+  function handleAppSettingsChange(next: AppSettings) {
+    setAppSettings(next)
+    saveAppSettings(next)
+    api.setDesktopNotificationsEnabled(next.desktop).catch(() => {})
+  }
+
+  const refreshAccountFolders = useCallback((accountId: string) => {
+    api
+      .listFolders(accountId)
+      .then((f) => setAccountFolders((prev) => ({ ...prev, [accountId]: f })))
+      .catch(() => {})
+  }, [])
+
+  useEffect(() => {
+    api.listAccounts().then((accs) => {
+      setAccounts(accs)
+      setExpandedAccounts(new Set(accs.map((a) => a.id)))
+      accs.forEach((a) => refreshAccountFolders(a.id))
+    })
+  }, [refreshAccountFolders])
+
+  useEffect(() => {
+    if (selectedAccountId || accounts.length === 0) return
+    for (const a of accounts) {
+      const folders = accountFolders[a.id]
+      if (folders && folders.length > 0) {
+        setSelectedAccountId(a.id)
+        setSelectedFolder(pickDefaultFolder(folders))
+        break
+      }
+    }
+  }, [accounts, accountFolders, selectedAccountId])
+
+  useEffect(() => {
+    if (!selectedAccountId || !selectedFolder) {
+      setMessages([])
+      return
+    }
+    setSelectedMessage(null)
+    setSelectedKeys(new Set())
+    anchorIndexRef.current = null
+    setComposing(false)
+    setLoadingMessages(true)
+    api
+      .listCachedMessages(selectedAccountId, selectedFolder)
+      .then(setMessages)
+      .finally(() => setLoadingMessages(false))
+
+    if (offlineMode) return
+    setRefreshing(true)
+    api
+      .syncMessages(selectedAccountId, selectedFolder)
+      .then(setMessages)
+      .catch((e) => showToast(`Synchronisierung fehlgeschlagen: ${e}`))
+      .finally(() => setRefreshing(false))
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [selectedAccountId, selectedFolder, showToast])
+
+  useEffect(() => {
+    if (!searchQuery.trim() && !hasAdvancedFilters) {
+      setSearchResults([])
+      return
+    }
+    const query = searchQuery.trim()
+    const dateFrom = advancedSearch.dateFrom ? Math.floor(new Date(advancedSearch.dateFrom).getTime() / 1000) : undefined
+    const dateTo = advancedSearch.dateTo ? Math.floor(new Date(advancedSearch.dateTo).getTime() / 1000) + 86399 : undefined
+    setSearching(true)
+    const timeout = setTimeout(() => {
+      api
+        .searchMessagesAdvanced(query, advancedSearch.from.trim() || undefined, dateFrom, dateTo, advancedSearch.hasAttachment)
+        .then(setSearchResults)
+        .catch((e) => showToast(`Suche fehlgeschlagen: ${e}`))
+        .finally(() => setSearching(false))
+    }, 200)
+    return () => clearTimeout(timeout)
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [searchQuery, advancedSearch, hasAdvancedFilters, showToast])
+
+  useEffect(() => {
+    const unlisten = listen<{ accountId: string; folder: string }>('new-mail', (event) => {
+      const acc = accounts.find((a) => a.id === event.payload.accountId)
+      if (notifySettings.popup) {
+        setNewMailNotification({
+          accountId: event.payload.accountId,
+          accountLabel: acc?.label ?? 'einem Konto',
+          folder: event.payload.folder,
+        })
+      } else {
+        showToast(`Neue E-Mail in ${acc?.label ?? 'einem Konto'}`)
+      }
+      refreshAccountFolders(event.payload.accountId)
+      if (event.payload.accountId === selectedAccountId && selectedFolder === event.payload.folder) {
+        api.syncMessages(selectedAccountId, selectedFolder).then(setMessages).catch(() => {})
+      }
+    })
+    return () => {
+      unlisten.then((f) => f())
+    }
+  }, [accounts, selectedAccountId, selectedFolder, refreshAccountFolders, showToast, notifySettings.popup])
+
+  useEffect(() => {
+    const unlisten = listen<PendingSend>('compose-scheduled', (event) => {
+      setPendingSend(event.payload)
+    })
+    return () => {
+      unlisten.then((f) => f())
+    }
+  }, [])
+
+  useEffect(() => {
+    const unlisten = listen<{ id: string; accountId: string; cancelled: boolean }>('scheduled-send-completed', (event) => {
+      setPendingSend((prev) => {
+        if (!prev || prev.id !== event.payload.id) return prev
+        if (event.payload.cancelled) {
+          showToast('Senden abgebrochen — als Entwurf gespeichert')
+        } else {
+          cleanupDraft(prev.draftUid)
+          refreshAccountFolders(event.payload.accountId)
+          showToast('E-Mail gesendet')
+        }
+        return null
+      })
+    })
+    return () => {
+      unlisten.then((f) => f())
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [refreshAccountFolders, showToast])
+
+  useEffect(() => {
+    function onKeyDown(e: KeyboardEvent) {
+      if (isEditableTarget(e.target) || e.metaKey || e.ctrlKey || e.altKey) return
+      if (e.key === '?') {
+        e.preventDefault()
+        setShortcutsModalOpen((v) => !v)
+        return
+      }
+      if (view !== 'mail') return
+      if (e.key === 'n' || e.key === 'N') {
+        e.preventDefault()
+        handleCompose()
+      } else if ((e.key === 'r' || e.key === 'R') && selectedMessage) {
+        e.preventDefault()
+        handleReply()
+      } else if ((e.key === 'f' || e.key === 'F') && selectedMessage) {
+        e.preventDefault()
+        handleForward()
+      } else if ((e.key === 'Delete' || e.key === 'Backspace') && selectedMessage) {
+        e.preventDefault()
+        handleDeleteMessage(selectedMessage)
+      }
+    }
+    window.addEventListener('keydown', onKeyDown)
+    return () => window.removeEventListener('keydown', onKeyDown)
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [view, selectedMessage])
+
+  function handleRefresh() {
+    if (offlineMode) {
+      showToast('Offline-Modus aktiv')
+      return
+    }
+    if (unifiedInbox) {
+      refreshUnifiedInbox()
+      return
+    }
+    if (!selectedAccountId || !selectedFolder) return
+    setRefreshing(true)
+    api
+      .syncMessages(selectedAccountId, selectedFolder)
+      .then(setMessages)
+      .catch((e) => showToast(`Synchronisierung fehlgeschlagen: ${e}`))
+      .finally(() => setRefreshing(false))
+    refreshAccountFolders(selectedAccountId)
+  }
+
+  async function handleRefreshAll() {
+    if (offlineMode) {
+      showToast('Offline-Modus aktiv')
+      return
+    }
+    setRefreshing(true)
+    try {
+      for (const a of accounts) {
+        const folders = accountFolders[a.id] ?? []
+        const inbox = pickDefaultFolder(folders)
+        if (!inbox) continue
+        try {
+          const msgs = await api.syncMessages(a.id, inbox)
+          if (a.id === selectedAccountId && inbox === selectedFolder) setMessages(msgs)
+        } catch {
+          // best-effort per account
+        }
+        refreshAccountFolders(a.id)
+      }
+      showToast('Alle Konten synchronisiert')
+    } finally {
+      setRefreshing(false)
+    }
+  }
+
+  function handleToggleOffline() {
+    setOfflineMode((prev) => {
+      const next = !prev
+      showToast(next ? 'Offline-Modus aktiviert' : 'Offline-Modus deaktiviert')
+      return next
+    })
+  }
+
+  function handleOpenNewMailNotification() {
+    if (!newMailNotification) return
+    setView('mail')
+    handleSelectFolder(newMailNotification.accountId, newMailNotification.folder)
+    setNewMailNotification(null)
+  }
+
+  function handleSelectFolder(accountId: string, folder: string) {
+    setUnifiedInbox(false)
+    setSelectedAccountId(accountId)
+    setSelectedFolder(folder)
+    setSearchQuery('')
+  }
+
+  async function refreshUnifiedInbox() {
+    const targets = accounts.filter((a) => a.protocol !== 'local')
+    setRefreshing(true)
+    try {
+      const results = await Promise.all(
+        targets.map(async (a) => {
+          const inbox = pickDefaultFolder(accountFolders[a.id] ?? [])
+          if (!inbox) return []
+          try {
+            return await api.syncMessages(a.id, inbox)
+          } catch {
+            try {
+              return await api.listCachedMessages(a.id, inbox)
+            } catch {
+              return []
+            }
+          }
+        }),
+      )
+      const merged = results.flat().sort((a, b) => b.timestamp - a.timestamp)
+      setUnifiedMessages(merged)
+    } finally {
+      setRefreshing(false)
+    }
+  }
+
+  function handleSelectUnifiedInbox() {
+    setUnifiedInbox(true)
+    setSelectedMessage(null)
+    setSelectedKeys(new Set())
+    anchorIndexRef.current = null
+    setComposing(false)
+    setSearchQuery('')
+    refreshUnifiedInbox()
+  }
+
+  function handleToggleExpand(accountId: string) {
+    setExpandedAccounts((prev) => {
+      const next = new Set(prev)
+      if (next.has(accountId)) next.delete(accountId)
+      else next.add(accountId)
+      return next
+    })
+  }
+
+  function handleToggleFavoriteFolder(accountId: string, folder: Folder) {
+    setFavorites((prev) => {
+      const exists = prev.some((f) => f.accountId === accountId && f.folder === folder.name)
+      const next = exists
+        ? prev.filter((f) => !(f.accountId === accountId && f.folder === folder.name))
+        : [...prev, { accountId, folder: folder.name, label: folder.display_name }]
+      saveFavoritesRaw(next)
+      return next
+    })
+  }
+
+  function handleRowClick(m: MessageSummary, index: number, e: React.MouseEvent) {
+    if (e.shiftKey && anchorIndexRef.current !== null) {
+      const lo = Math.min(anchorIndexRef.current, index)
+      const hi = Math.max(anchorIndexRef.current, index)
+      setSelectedKeys(new Set(visibleMessages.slice(lo, hi + 1).map(keyOf)))
+      setSelectedMessage(null)
+      return
+    }
+    if (e.ctrlKey || e.metaKey) {
+      anchorIndexRef.current = index
+      setSelectedKeys((prev) => {
+        const next = new Set(prev)
+        const k = keyOf(m)
+        if (next.has(k)) next.delete(k)
+        else next.add(k)
+        return next
+      })
+      setSelectedMessage(null)
+      return
+    }
+    anchorIndexRef.current = index
+    setSelectedKeys(new Set([keyOf(m)]))
+    handleSelectMessage(m)
+  }
+
+  function handleSelectMessage(m: MessageSummary) {
+    if (m.account_id === LOCAL_ACCOUNT_ID && m.folder === DRAFTS_FOLDER) {
+      handleOpenDraft(m.uid)
+      return
+    }
+    setComposing(false)
+    setLoadingMessage(true)
+    const markRead = (list: MessageSummary[]) =>
+      list.map((x) => (x.uid === m.uid && x.folder === m.folder && x.account_id === m.account_id ? { ...x, is_read: true } : x))
+    setMessages(markRead)
+    setSearchResults(markRead)
+    api
+      .getMessage(m.account_id, m.folder, m.uid)
+      .then(setSelectedMessage)
+      .catch((e) => showToast(`Nachricht konnte nicht geladen werden: ${e}`))
+      .finally(() => setLoadingMessage(false))
+  }
+
+  function registerNewAccount(created: Account) {
+    setAccounts((prev) => [...prev, created])
+    setExpandedAccounts((prev) => new Set(prev).add(created.id))
+    refreshAccountFolders(created.id)
+    setAccountModalOpen(false)
+    showToast(`Konto ${created.email} hinzugefügt`)
+  }
+
+  async function handleAddAccount(newAccount: NewAccount) {
+    const created = await api.addAccount(newAccount)
+    registerNewAccount(created)
+  }
+
+  async function handleGoogleOAuthAdd() {
+    const created = await api.googleOAuthAddAccount()
+    registerNewAccount(created)
+  }
+
+  async function handleUpdateAccount(account: Account, newPassword?: string) {
+    await api.updateAccount(account, newPassword)
+    setAccounts((prev) => prev.map((a) => (a.id === account.id ? account : a)))
+    setSettingsAccount(null)
+    refreshAccountFolders(account.id)
+    showToast('Konto aktualisiert')
+  }
+
+  async function handleDeleteAccount(account: Account) {
+    await api.deleteAccount(account.id)
+    setAccounts((prev) => prev.filter((a) => a.id !== account.id))
+    setAccountFolders((prev) => {
+      const next = { ...prev }
+      delete next[account.id]
+      return next
+    })
+    setExpandedAccounts((prev) => {
+      const next = new Set(prev)
+      next.delete(account.id)
+      return next
+    })
+    if (selectedAccountId === account.id) {
+      setSelectedAccountId(null)
+      setSelectedFolder(null)
+    }
+    setSettingsAccount(null)
+    showToast(`Konto ${account.label} gelöscht`)
+  }
+
+  async function openComposeWindow(initial: ComposeInitial | null, accId: string | null) {
+    const label = `compose-${crypto.randomUUID().slice(0, 8)}`
+    const win = new WebviewWindow(label, {
+      url: 'index.html?compose=1',
+      title: initial ? 'Antworten' : 'Neue E-Mail',
+      width: 760,
+      height: 640,
+      minWidth: 480,
+      minHeight: 380,
+    })
+    win.once('tauri://error', (e) => showToast(`Popup-Fenster fehlgeschlagen: ${e}`))
+    const un = await listen<{ label: string }>('compose-ready', async (e) => {
+      if (e.payload.label !== label) return
+      await emitTo(label, 'compose-init', { initial, accountId: accId })
+      un()
+    })
+  }
+
+  function startCompose(initial: ComposeInitial | null, accId: string | null) {
+    if (notifySettings.composePopup) {
+      openComposeWindow(initial, accId)
+    } else {
+      setComposeAccountId(accId)
+      setComposeInitial(initial)
+      setComposing(true)
+    }
+  }
+
+  function handleCompose() {
+    startCompose(null, selectedAccountId)
+  }
+
+  function handleReply() {
+    if (!selectedMessage) return
+    const m = selectedMessage
+    startCompose({ to: m.from_addr, subject: prefixSubject(m.subject, 'Re:'), body: quoteBody(m) }, m.account_id)
+  }
+
+  function handleReplyAll() {
+    if (!selectedMessage) return
+    const m = selectedMessage
+    const account = accounts.find((a) => a.id === m.account_id)
+    const recipients = new Set([m.from_addr.toLowerCase(), ...parseAddressList(m.to)])
+    if (account) recipients.delete(account.email.toLowerCase())
+    recipients.delete(m.from_addr.toLowerCase())
+    const to = m.from_addr
+    const cc = Array.from(recipients).join(', ')
+    startCompose({ to, cc, subject: prefixSubject(m.subject, 'Re:'), body: quoteBody(m) }, m.account_id)
+  }
+
+  function handleForward() {
+    if (!selectedMessage) return
+    const m = selectedMessage
+    const attachments: OutgoingAttachment[] = m.attachments.map((a) => ({
+      filename: a.filename,
+      mime_type: a.mime_type,
+      content_base64: a.content_base64,
+    }))
+    startCompose(
+      {
+        to: '',
+        subject: prefixSubject(m.subject, 'Fwd:'),
+        body: `<br><br><p>---------- Weitergeleitete Nachricht ----------<br>Von: ${escapeHtml(m.from_name || m.from_addr)} &lt;${escapeHtml(m.from_addr)}&gt;<br>Datum: ${escapeHtml(m.date)}<br>Betreff: ${escapeHtml(m.subject)}</p>${messageBodyAsHtml(m)}`,
+        attachments,
+      },
+      m.account_id,
+    )
+  }
+
+  async function handleOpenDraft(uid: number) {
+    try {
+      const draft = await api.loadDraft(uid)
+      startCompose(
+        {
+          to: draft.to,
+          cc: draft.cc || undefined,
+          subject: draft.subject,
+          body: draft.body,
+          draftUid: draft.uid,
+          skipSignature: true,
+        },
+        draft.account_id ?? selectedAccountId,
+      )
+    } catch (e) {
+      showToast(`Entwurf konnte nicht geladen werden: ${e}`)
+    }
+  }
+
+  function handleDraftSaved(uid: number) {
+    setCurrentDraftUid(uid)
+    if (selectedAccountId === LOCAL_ACCOUNT_ID && selectedFolder === DRAFTS_FOLDER) {
+      api.syncMessages(LOCAL_ACCOUNT_ID, DRAFTS_FOLDER).then(setMessages).catch(() => {})
+    }
+  }
+
+  function cleanupDraft(uid: number | null) {
+    if (uid == null) return
+    api
+      .deleteMessage(LOCAL_ACCOUNT_ID, DRAFTS_FOLDER, uid)
+      .then(() => {
+        refreshAccountFolders(LOCAL_ACCOUNT_ID)
+        if (selectedAccountId === LOCAL_ACCOUNT_ID && selectedFolder === DRAFTS_FOLDER) {
+          api.syncMessages(LOCAL_ACCOUNT_ID, DRAFTS_FOLDER).then(setMessages).catch(() => {})
+        }
+      })
+      .catch(() => {})
+  }
+
+  function handleDiscardCompose() {
+    setComposing(false)
+    cleanupDraft(currentDraftUid)
+    setCurrentDraftUid(null)
+  }
+
+  async function handleSend(msg: ComposeMessage, sendAt: number) {
+    setSending(true)
+    try {
+      const id = await api.sendMessageAt(msg, sendAt)
+      setComposing(false)
+      setPendingSend({ id, deadline: sendAt, draftUid: currentDraftUid, accountId: msg.account_id })
+      setCurrentDraftUid(null)
+    } finally {
+      setSending(false)
+    }
+  }
+
+  async function handleCancelSend() {
+    if (!pendingSend) return
+    await api.cancelScheduledSend(pendingSend.id).catch(() => {})
+  }
+
+  async function handleDeleteMessage(m: Pick<MessageFull, 'account_id' | 'folder' | 'uid'>) {
+    await api.deleteMessage(m.account_id, m.folder, m.uid)
+    setMessages((prev) => prev.filter((x) => !(x.uid === m.uid && x.folder === m.folder && x.account_id === m.account_id)))
+    setSearchResults((prev) => prev.filter((x) => !(x.uid === m.uid && x.folder === m.folder && x.account_id === m.account_id)))
+    setSelectedMessage(null)
+    showToast('Nachricht gelöscht')
+  }
+
+  async function handleToggleFlag(m: MessageSummary) {
+    const next = !m.flagged
+    const update = (list: MessageSummary[]) =>
+      list.map((x) => (x.uid === m.uid && x.folder === m.folder && x.account_id === m.account_id ? { ...x, flagged: next } : x))
+    setMessages(update)
+    setSearchResults(update)
+    try {
+      await api.toggleFlag(m.account_id, m.folder, m.uid, next)
+    } catch (e) {
+      showToast(`Markieren fehlgeschlagen: ${e}`)
+    }
+  }
+
+  async function handleSetMessageCategory(m: MessageSummary, category: string | null) {
+    const update = (list: MessageSummary[]) =>
+      list.map((x) => (x.uid === m.uid && x.folder === m.folder && x.account_id === m.account_id ? { ...x, category } : x))
+    setMessages(update)
+    setSearchResults(update)
+    try {
+      await api.setMessageCategory(m.account_id, m.folder, m.uid, category)
+    } catch (e) {
+      showToast(`Kategorie fehlgeschlagen: ${e}`)
+    }
+  }
+
+  async function handleMarkUnread(m: MessageFull) {
+    await api.markRead(m.account_id, m.folder, m.uid, false)
+    setMessages((prev) =>
+      prev.map((x) => (x.uid === m.uid && x.folder === m.folder && x.account_id === m.account_id ? { ...x, is_read: false } : x)),
+    )
+    setSelectedMessage(null)
+    showToast('Als ungelesen markiert')
+  }
+
+  async function handleSetMessageRead(m: Pick<MessageFull, 'account_id' | 'folder' | 'uid'>, isRead: boolean) {
+    const update = (list: MessageSummary[]) =>
+      list.map((x) => (x.uid === m.uid && x.folder === m.folder && x.account_id === m.account_id ? { ...x, is_read: isRead } : x))
+    setMessages(update)
+    setSearchResults(update)
+    try {
+      await api.markRead(m.account_id, m.folder, m.uid, isRead)
+    } catch (e) {
+      showToast(`Fehlgeschlagen: ${e}`)
+    }
+  }
+
+  async function handleMove(m: Pick<MessageFull, 'account_id' | 'folder' | 'uid'>, targetFolder: string) {
+    try {
+      await api.moveMessage(m.account_id, m.folder, m.uid, targetFolder)
+      setMessages((prev) => prev.filter((x) => !(x.uid === m.uid && x.folder === m.folder && x.account_id === m.account_id)))
+      setSearchResults((prev) => prev.filter((x) => !(x.uid === m.uid && x.folder === m.folder && x.account_id === m.account_id)))
+      setSelectedMessage(null)
+      showToast('Nachricht verschoben')
+      refreshAccountFolders(m.account_id)
+    } catch (e) {
+      showToast(`Verschieben fehlgeschlagen: ${e}`)
+    }
+  }
+
+  function selectedSummaries(): MessageSummary[] {
+    return visibleMessages.filter((m) => selectedKeys.has(keyOf(m)))
+  }
+
+  async function handleBulkDelete() {
+    const items = selectedSummaries()
+    if (items.length === 0) return
+    await Promise.all(items.map((m) => api.deleteMessage(m.account_id, m.folder, m.uid)))
+    const keys = new Set(items.map(keyOf))
+    setMessages((prev) => prev.filter((x) => !keys.has(keyOf(x))))
+    setSearchResults((prev) => prev.filter((x) => !keys.has(keyOf(x))))
+    setSelectedKeys(new Set())
+    setSelectedMessage(null)
+    showToast(`${items.length} Nachrichten gelöscht`)
+  }
+
+  async function handleBulkMove(targetFolder: string) {
+    const items = selectedSummaries()
+    if (items.length === 0) return
+    try {
+      await Promise.all(items.map((m) => api.moveMessage(m.account_id, m.folder, m.uid, targetFolder)))
+      const keys = new Set(items.map(keyOf))
+      setMessages((prev) => prev.filter((x) => !keys.has(keyOf(x))))
+      setSearchResults((prev) => prev.filter((x) => !keys.has(keyOf(x))))
+      setSelectedKeys(new Set())
+      setSelectedMessage(null)
+      showToast(`${items.length} Nachrichten verschoben`)
+      items.forEach((m) => refreshAccountFolders(m.account_id))
+    } catch (e) {
+      showToast(`Verschieben fehlgeschlagen: ${e}`)
+    }
+  }
+
+  async function handleBulkMarkRead(isRead: boolean) {
+    const items = selectedSummaries()
+    if (items.length === 0) return
+    const keys = new Set(items.map(keyOf))
+    const update = (list: MessageSummary[]) =>
+      list.map((x) => (keys.has(keyOf(x)) ? { ...x, is_read: isRead } : x))
+    setMessages(update)
+    setSearchResults(update)
+    try {
+      await Promise.all(items.map((m) => api.markRead(m.account_id, m.folder, m.uid, isRead)))
+    } catch (e) {
+      showToast(`Fehlgeschlagen: ${e}`)
+    }
+  }
+
+  async function handleBulkFlag() {
+    const items = selectedSummaries()
+    if (items.length === 0) return
+    const next = !items.every((m) => m.flagged)
+    const keys = new Set(items.map(keyOf))
+    const update = (list: MessageSummary[]) =>
+      list.map((x) => (keys.has(keyOf(x)) ? { ...x, flagged: next } : x))
+    setMessages(update)
+    setSearchResults(update)
+    try {
+      await Promise.all(items.map((m) => api.toggleFlag(m.account_id, m.folder, m.uid, next)))
+    } catch (e) {
+      showToast(`Markieren fehlgeschlagen: ${e}`)
+    }
+  }
+
+  function handleMessageContextMenu(e: React.MouseEvent, m: MessageSummary, index: number) {
+    const bulk = selectedKeys.size > 1 && selectedKeys.has(keyOf(m))
+    if (!bulk) {
+      anchorIndexRef.current = index
+      setSelectedKeys(new Set([keyOf(m)]))
+    }
+    const count = bulk ? selectedSummaries().length : 1
+    const allRead = bulk ? selectedSummaries().every((x) => x.is_read) : m.is_read
+    const allFlagged = bulk ? selectedSummaries().every((x) => x.flagged) : m.flagged
+    const folders = (accountFolders[m.account_id] ?? []).filter((f) => f.name !== m.folder)
+
+    const sections: ContextMenuSection[] = [
+      [
+        {
+          label: allRead ? 'Als ungelesen markieren' : 'Als gelesen markieren',
+          icon: <MailOpen size={13} />,
+          onClick: () => (bulk ? handleBulkMarkRead(!allRead) : handleSetMessageRead(m, !allRead)),
+        },
+        {
+          label: allFlagged ? 'Markierung entfernen' : 'Markieren',
+          icon: <Star size={13} />,
+          onClick: () => (bulk ? handleBulkFlag() : handleToggleFlag(m)),
+        },
+      ],
+      [
+        {
+          label: 'Verschieben nach',
+          icon: <FolderInput size={13} />,
+          disabled: folders.length === 0,
+          submenu: folders.map((f) => ({
+            label: f.display_name,
+            onClick: () => (bulk ? handleBulkMove(f.name) : handleMove(m, f.name)),
+          })),
+        },
+        {
+          label: 'Kategorie',
+          icon: <Tag size={13} />,
+          submenu: [
+            ...CATEGORY_COLORS.map((c) => ({
+              label: c.label,
+              icon: <span className="h-2.5 w-2.5 rounded-full" style={{ backgroundColor: c.hex }} />,
+              onClick: () => (bulk ? handleRibbonSetCategory(c.id) : handleSetMessageCategory(m, c.id)),
+            })),
+            { label: 'Keine', onClick: () => (bulk ? handleRibbonSetCategory(null) : handleSetMessageCategory(m, null)) },
+          ],
+        },
+      ],
+      [
+        {
+          label: 'Als Aufgabe markieren',
+          icon: <ListTodo size={13} />,
+          disabled: bulk,
+          onClick: () => handleCreateTaskFromMessage(m),
+        },
+        {
+          label: 'Später erledigen',
+          icon: <BellRing size={13} />,
+          disabled: bulk,
+          submenu: snoozePresets().map((p) => ({
+            label: p.label,
+            onClick: () => handleSnoozeMessage(m, p.untilTs),
+          })),
+        },
+      ],
+      [
+        {
+          label: 'Absender blockieren',
+          icon: <ShieldOff size={13} />,
+          disabled: bulk,
+          onClick: () => handleBlockSender(m),
+        },
+      ],
+      [
+        {
+          label: bulk ? `${count} Nachrichten löschen` : 'Löschen',
+          icon: <Trash2 size={13} />,
+          danger: true,
+          onClick: () => (bulk ? handleBulkDelete() : handleDeleteMessage(m)),
+        },
+      ],
+    ]
+    openMenu(e, sections)
+  }
+
+  function snoozePresets(): { label: string; untilTs: number }[] {
+    const now = new Date()
+    const inHours = (h: number) => Math.floor(now.getTime() / 1000) + h * 3600
+    const tonight = new Date(now)
+    tonight.setHours(18, 0, 0, 0)
+    if (tonight.getTime() <= now.getTime()) tonight.setDate(tonight.getDate() + 1)
+    const tomorrow = new Date(now)
+    tomorrow.setDate(tomorrow.getDate() + 1)
+    tomorrow.setHours(8, 0, 0, 0)
+    const nextWeek = new Date(now)
+    nextWeek.setDate(nextWeek.getDate() + ((7 - nextWeek.getDay() + 1) % 7 || 7))
+    nextWeek.setHours(8, 0, 0, 0)
+    return [
+      { label: 'In 3 Stunden', untilTs: inHours(3) },
+      { label: 'Heute Abend (18 Uhr)', untilTs: Math.floor(tonight.getTime() / 1000) },
+      { label: 'Morgen (8 Uhr)', untilTs: Math.floor(tomorrow.getTime() / 1000) },
+      { label: 'Nächste Woche', untilTs: Math.floor(nextWeek.getTime() / 1000) },
+    ]
+  }
+
+  function handleOpenSnoozedMessage(m: MessageSummary) {
+    setView('mail')
+    handleSelectFolder(m.account_id, m.folder)
+    handleSelectMessage(m)
+  }
+
+  async function handleSnoozeMessage(m: MessageSummary, untilTs: number) {
+    try {
+      await api.snoozeMessage(m.account_id, m.folder, m.uid, untilTs)
+      const keys = new Set([keyOf(m)])
+      setMessages((prev) => prev.filter((x) => !keys.has(keyOf(x))))
+      setSearchResults((prev) => prev.filter((x) => !keys.has(keyOf(x))))
+      showToast('Auf Wiedervorlage gelegt')
+    } catch (e) {
+      showToast(`Fehlgeschlagen: ${e}`)
+    }
+  }
+
+  async function handleBlockSender(m: MessageSummary) {
+    try {
+      await api.createRule({
+        account_id: null,
+        conditions: [{ field: 'from', contains: m.from_addr }],
+        match_type: 'all',
+        action: 'delete',
+      })
+      showToast(`„${m.from_addr}“ wird jetzt blockiert`)
+    } catch (e) {
+      showToast(`Fehlgeschlagen: ${e}`)
+    }
+  }
+
+  function handleMessageDragStart(m: MessageSummary, index: number) {
+    const bulk = selectedKeys.size > 1 && selectedKeys.has(keyOf(m))
+    if (!bulk) {
+      anchorIndexRef.current = index
+      setSelectedKeys(new Set([keyOf(m)]))
+    }
+    draggedMessagesRef.current = bulk ? selectedSummaries() : [m]
+  }
+
+  function handleDropMessagesOnFolder(accountId: string, folder: string) {
+    const items = draggedMessagesRef.current
+    draggedMessagesRef.current = []
+    if (items.length === 0) return
+    if (items.some((m) => m.account_id !== accountId)) {
+      showToast('Verschieben zwischen verschiedenen Konten wird nicht unterstützt')
+      return
+    }
+    if (items.length === 1) {
+      if (items[0].folder === folder) return
+      handleMove(items[0], folder)
+    } else {
+      handleBulkMove(folder)
+    }
+  }
+
+  async function handleMarkDone() {
+    const items = selectedKeys.size > 1 ? selectedSummaries() : selectedSummary ? [selectedSummary] : []
+    if (items.length === 0) return
+    const keys = new Set(items.map(keyOf))
+    const update = (list: MessageSummary[]) =>
+      list.map((x) => (keys.has(keyOf(x)) ? { ...x, is_read: true, flagged: false } : x))
+    setMessages(update)
+    setSearchResults(update)
+    try {
+      await Promise.all(
+        items.flatMap((m) => [
+          api.markRead(m.account_id, m.folder, m.uid, true),
+          api.toggleFlag(m.account_id, m.folder, m.uid, false),
+        ]),
+      )
+      showToast('Als erledigt markiert')
+    } catch (e) {
+      showToast(`Fehlgeschlagen: ${e}`)
+    }
+  }
+
+  function handleArchive() {
+    const target = currentFolders.find(
+      (f) => f.name.toLowerCase().includes('archiv') || f.display_name.toLowerCase().includes('archiv'),
+    )
+    if (!target) {
+      showToast('Kein Archiv-Ordner gefunden')
+      return
+    }
+    if (selectedKeys.size > 1) handleBulkMove(target.name)
+    else if (selectedMessage) handleMove(selectedMessage, target.name)
+  }
+
+  async function handleRibbonSetCategory(category: string | null) {
+    if (selectedKeys.size > 1) {
+      const items = selectedSummaries()
+      const keys = new Set(items.map(keyOf))
+      const update = (list: MessageSummary[]) => list.map((x) => (keys.has(keyOf(x)) ? { ...x, category } : x))
+      setMessages(update)
+      setSearchResults(update)
+      try {
+        await Promise.all(items.map((m) => api.setMessageCategory(m.account_id, m.folder, m.uid, category)))
+      } catch (e) {
+        showToast(`Kategorie fehlgeschlagen: ${e}`)
+      }
+    } else if (selectedSummary) {
+      handleSetMessageCategory(selectedSummary, category)
+    }
+  }
+
+  async function createFolderIn(accountId: string) {
+    const name = window.prompt('Name des neuen Ordners:')
+    if (!name || !name.trim()) return
+    try {
+      await api.createFolder(accountId, name.trim())
+      refreshAccountFolders(accountId)
+      showToast('Ordner erstellt')
+    } catch (e) {
+      showToast(`Fehlgeschlagen: ${e}`)
+    }
+  }
+
+  async function renameFolderAt(accountId: string, folder: string) {
+    const name = window.prompt('Neuer Name:', folder)
+    if (!name || !name.trim() || name.trim() === folder) return
+    try {
+      await api.renameFolder(accountId, folder, name.trim())
+      refreshAccountFolders(accountId)
+      if (selectedAccountId === accountId && selectedFolder === folder) setSelectedFolder(name.trim())
+      showToast('Ordner umbenannt')
+    } catch (e) {
+      showToast(`Fehlgeschlagen: ${e}`)
+    }
+  }
+
+  async function deleteFolderAt(accountId: string, folder: string) {
+    if (!window.confirm(`Ordner „${folder}“ wirklich löschen? Alle enthaltenen Nachrichten gehen verloren.`)) return
+    try {
+      await api.deleteFolder(accountId, folder)
+      if (selectedAccountId === accountId && selectedFolder === folder) setSelectedFolder(null)
+      refreshAccountFolders(accountId)
+      showToast('Ordner gelöscht')
+    } catch (e) {
+      showToast(`Fehlgeschlagen: ${e}`)
+    }
+  }
+
+  async function markFolderReadAt(accountId: string, folder: string) {
+    try {
+      const count = await api.markFolderRead(accountId, folder)
+      if (selectedAccountId === accountId && selectedFolder === folder) {
+        setMessages((prev) => prev.map((m) => ({ ...m, is_read: true })))
+      }
+      refreshAccountFolders(accountId)
+      showToast(`${count} Nachrichten als gelesen markiert`)
+    } catch (e) {
+      showToast(`Fehlgeschlagen: ${e}`)
+    }
+  }
+
+  async function handleNewFolder() {
+    if (!selectedAccountId) return
+    createFolderIn(selectedAccountId)
+  }
+
+  async function handleRenameFolder() {
+    if (!selectedAccountId || !selectedFolder) return
+    renameFolderAt(selectedAccountId, selectedFolder)
+  }
+
+  async function handleDeleteFolder() {
+    if (!selectedAccountId || !selectedFolder) return
+    deleteFolderAt(selectedAccountId, selectedFolder)
+  }
+
+  async function handleMarkFolderRead() {
+    if (!selectedAccountId || !selectedFolder) return
+    markFolderReadAt(selectedAccountId, selectedFolder)
+  }
+
+  function handleFolderContextMenu(e: React.MouseEvent, accountId: string, folder: Folder) {
+    const isFavorite = favorites.some((f) => f.accountId === accountId && f.folder === folder.name)
+    const sections: ContextMenuSection[] = [
+      [
+        { label: 'Neuer Ordner', icon: <FolderPlus size={13} />, onClick: () => createFolderIn(accountId) },
+        {
+          label: isFavorite ? 'Favorit entfernen' : 'Zu Favoriten hinzufügen',
+          icon: <Star size={13} />,
+          onClick: () => handleToggleFavoriteFolder(accountId, folder),
+        },
+        {
+          label: 'Als gelesen markieren',
+          icon: <MailOpen size={13} />,
+          onClick: () => markFolderReadAt(accountId, folder.name),
+        },
+      ],
+      [
+        { label: 'Umbenennen', icon: <Pencil size={13} />, onClick: () => renameFolderAt(accountId, folder.name) },
+        {
+          label: 'Löschen',
+          icon: <Trash2 size={13} />,
+          danger: true,
+          onClick: () => deleteFolderAt(accountId, folder.name),
+        },
+      ],
+    ]
+    openMenu(e, sections)
+  }
+
+  async function handleApplyRulesToFolder() {
+    if (!selectedAccountId || !selectedFolder) return
+    try {
+      const count = await api.applyRulesToFolder(selectedAccountId, selectedFolder)
+      api.syncMessages(selectedAccountId, selectedFolder).then(setMessages).catch(() => {})
+      refreshAccountFolders(selectedAccountId)
+      showToast(`${count} Nachrichten durch Regeln bearbeitet`)
+    } catch (e) {
+      showToast(`Fehlgeschlagen: ${e}`)
+    }
+  }
+
+  function handleSortFoldersAZ() {
+    if (!selectedAccountId) return
+    setAccountFolders((prev) => ({
+      ...prev,
+      [selectedAccountId]: [...(prev[selectedAccountId] ?? [])].sort((a, b) => a.display_name.localeCompare(b.display_name)),
+    }))
+  }
+
+  function handleAddFavoriteCurrent() {
+    if (!selectedAccountId || !selectedFolder) return
+    const folder = currentFolders.find((f) => f.name === selectedFolder)
+    if (folder) handleToggleFavoriteFolder(selectedAccountId, folder)
+  }
+
+  function handleNewSearchFolder() {
+    if (!searchQuery.trim()) {
+      showToast('Erst eine Suche eingeben, dann als Suchordner speichern')
+      return
+    }
+    const entry: SavedSearch = { id: crypto.randomUUID(), label: searchQuery.trim(), query: searchQuery.trim() }
+    setSavedSearches((prev) => {
+      const next = [...prev, entry]
+      persistSavedSearches(next)
+      return next
+    })
+    showToast('Suchordner gespeichert')
+  }
+
+  function handleDeleteSavedSearch(id: string) {
+    setSavedSearches((prev) => {
+      const next = prev.filter((s) => s.id !== id)
+      persistSavedSearches(next)
+      return next
+    })
+  }
+
+  function handleResetView() {
+    setDensity('comfortable')
+    saveDensity('comfortable')
+    setGroupConversations(false)
+    saveConversationsEnabled(false)
+    setSortBy('date')
+    setSortDesc(true)
+    setSidebarCollapsed(false)
+    setEmailFilter('none')
+    showToast('Ansicht zurückgesetzt')
+  }
+
+  async function handleExportFolder() {
+    if (!selectedAccountId || !selectedFolder) return
+    const path = await save({ defaultPath: `${selectedFolder}.mbox`, filters: [{ name: 'Mbox', extensions: ['mbox'] }] })
+    if (!path) return
+    try {
+      const count = await api.exportFolderMbox(selectedAccountId, selectedFolder, path)
+      showToast(`${count} Nachrichten exportiert`)
+    } catch (e) {
+      showToast(`Export fehlgeschlagen: ${e}`)
+    }
+  }
+
+  async function handleFullBackup() {
+    const dir = await open({ directory: true })
+    if (!dir || Array.isArray(dir)) return
+    showToast('Sicherung läuft…')
+    try {
+      const count = await api.exportFullBackup(dir)
+      showToast(`Sicherung abgeschlossen: ${count} Nachrichten`)
+    } catch (e) {
+      showToast(`Sicherung fehlgeschlagen: ${e}`)
+    }
+  }
+
+  function handleImported(accountId: string, folder: string) {
+    showToast('Import abgeschlossen')
+    refreshAccountFolders(accountId)
+    if (accountId === selectedAccountId && folder === selectedFolder) {
+      api.syncMessages(accountId, folder).then(setMessages).catch(() => {})
+    }
+  }
+
+  const refreshEvents = useCallback(() => {
+    const [start, end] = monthGridRange(monthDate)
+    setLoadingEvents(true)
+    api
+      .listEvents(start, end)
+      .then(setEvents)
+      .catch((e) => showToast(`Termine konnten nicht geladen werden: ${e}`))
+      .finally(() => setLoadingEvents(false))
+  }, [monthDate, showToast])
+
+  const refreshCaldavAccounts = useCallback(() => {
+    api.listCaldavAccounts().then(setCaldavAccounts).catch(() => {})
+  }, [])
+
+  useEffect(() => {
+    if (view === 'calendar') {
+      refreshEvents()
+      refreshCaldavAccounts()
+    }
+  }, [view, refreshEvents, refreshCaldavAccounts])
+
+  function handleNewEvent() {
+    setEditingEvent(null)
+    setEditingOccurrenceStart(null)
+    setEventDefaultDate(new Date())
+    setEventModalOpen(true)
+  }
+
+  function handleDayClick(date: Date) {
+    setEditingEvent(null)
+    setEditingOccurrenceStart(null)
+    setEventDefaultDate(date)
+    setEventModalOpen(true)
+  }
+
+  function isVirtualOccurrence(event: CalendarEvent): boolean {
+    return !!event.rrule && event.id !== event.base_id
+  }
+
+  async function handleEventClick(event: CalendarEvent) {
+    setEventDefaultDate(null)
+    if (isVirtualOccurrence(event)) {
+      setRecurrenceScopeTarget({ event, action: 'edit' })
+      return
+    }
+    setEditingOccurrenceStart(null)
+    setEditingEvent(event)
+    setEventModalOpen(true)
+  }
+
+  async function handleSaveEvent(data: NewEvent, existingId: string | null) {
+    if (editingOccurrenceStart !== null && editingEvent) {
+      await api.updateEventOccurrence(editingEvent.base_id, editingOccurrenceStart, data)
+      setEditingOccurrenceStart(null)
+      setEventModalOpen(false)
+      refreshEvents()
+      showToast('Termin aktualisiert')
+      return
+    }
+    if (existingId) {
+      await api.updateEvent({
+        id: existingId,
+        base_id: existingId,
+        title: data.title,
+        location: data.location ?? null,
+        description: data.description ?? null,
+        start_ts: data.start_ts,
+        end_ts: data.end_ts,
+        all_day: data.all_day,
+        account_id: editingEvent?.account_id ?? null,
+        google_event_id: editingEvent?.google_event_id ?? null,
+        rrule: data.rrule ?? null,
+        reminder_minutes: data.reminder_minutes ?? null,
+        category: data.category ?? null,
+      })
+    } else {
+      await api.createEvent(data)
+    }
+    setEventModalOpen(false)
+    refreshEvents()
+    showToast(existingId ? 'Termin aktualisiert' : 'Termin erstellt')
+  }
+
+  async function handleDeleteEvent(event: CalendarEvent) {
+    await api.deleteEvent(event.base_id)
+    setEventModalOpen(false)
+    refreshEvents()
+    showToast('Termin gelöscht')
+  }
+
+  async function handleDeleteOccurrence(event: CalendarEvent) {
+    await api.deleteEventOccurrence(event.base_id, event.start_ts)
+    setEventModalOpen(false)
+    refreshEvents()
+    showToast('Termin gelöscht')
+  }
+
+  async function handleRecurrenceScopeChoice(scope: 'occurrence' | 'series') {
+    const target = recurrenceScopeTarget
+    setRecurrenceScopeTarget(null)
+    if (!target) return
+    const { event, action } = target
+    if (action === 'edit') {
+      if (scope === 'series') {
+        try {
+          const base = await api.getEvent(event.base_id)
+          setEditingOccurrenceStart(null)
+          setEditingEvent(base)
+        } catch (e) {
+          showToast(`Termin konnte nicht geladen werden: ${e}`)
+          return
+        }
+      } else {
+        setEditingOccurrenceStart(event.start_ts)
+        setEditingEvent(event)
+      }
+      setEventModalOpen(true)
+    } else {
+      if (scope === 'series') await handleDeleteEvent(event)
+      else await handleDeleteOccurrence(event)
+    }
+  }
+
+  function handleEventContextMenu(e: React.MouseEvent, event: CalendarEvent) {
+    const sections: ContextMenuSection[] = [
+      [{ label: 'Bearbeiten', icon: <Pencil size={13} />, onClick: () => handleEventClick(event) }],
+      [
+        {
+          label: 'Löschen',
+          icon: <Trash2 size={13} />,
+          danger: true,
+          onClick: () => {
+            if (isVirtualOccurrence(event)) {
+              setRecurrenceScopeTarget({ event, action: 'delete' })
+            } else if (window.confirm(`Termin „${event.title}“ wirklich löschen?`)) {
+              handleDeleteEvent(event)
+            }
+          },
+        },
+      ],
+    ]
+    openMenu(e, sections)
+  }
+
+  async function handleImportIcs() {
+    const path = await open({ multiple: false, filters: [{ name: 'Kalender', extensions: ['ics'] }] })
+    if (!path || Array.isArray(path)) return
+    try {
+      const count = await api.importIcsFile(path)
+      refreshEvents()
+      showToast(`${count} Termine importiert`)
+    } catch (e) {
+      showToast(`Import fehlgeschlagen: ${e}`)
+    }
+  }
+
+  async function handleImportIcsAttachment(base64: string) {
+    try {
+      const bytes = Uint8Array.from(atob(base64), (c) => c.charCodeAt(0))
+      const text = new TextDecoder('utf-8').decode(bytes)
+      const count = await api.importIcsText(text)
+      showToast(count > 0 ? `${count} Termine zum Kalender hinzugefügt` : 'Keine Termine im Anhang gefunden')
+      if (view === 'calendar') refreshEvents()
+    } catch (e) {
+      showToast(`Import fehlgeschlagen: ${e}`)
+    }
+  }
+
+  async function handleReplyToInvite(accountId: string, icsBase64: string, response: InviteResponse) {
+    try {
+      await api.replyToInvite(accountId, icsBase64, response)
+      if (response !== 'declined' && view === 'calendar') refreshEvents()
+      showToast('Antwort an Organisator gesendet')
+    } catch (e) {
+      showToast(`Antwort fehlgeschlagen: ${e}`)
+      throw e
+    }
+  }
+
+  async function handleSyncGoogleCalendar(accountId: string) {
+    try {
+      const count = await api.syncGoogleCalendar(accountId)
+      refreshEvents()
+      showToast(`${count} Termine synchronisiert`)
+    } catch (e) {
+      showToast(`Synchronisierung fehlgeschlagen: ${e}`)
+    }
+  }
+
+  async function handleSyncGoogleContacts(accountId: string) {
+    try {
+      const count = await api.syncGoogleContacts(accountId)
+      refreshContacts()
+      showToast(`${count} Kontakte synchronisiert`)
+    } catch (e) {
+      showToast(`Synchronisierung fehlgeschlagen: ${e}`)
+    }
+  }
+
+  async function handleReconnectGoogleAccount(accountId: string) {
+    try {
+      await api.reconnectGoogleAccount(accountId)
+      showToast('Google-Konto verbunden')
+    } catch (e) {
+      showToast(`Verbinden fehlgeschlagen: ${e}`)
+    }
+  }
+
+  async function handleExportIcs() {
+    const path = await save({ defaultPath: 'kalender.ics', filters: [{ name: 'Kalender', extensions: ['ics'] }] })
+    if (!path) return
+    try {
+      const count = await api.exportEventsIcs(path)
+      showToast(`${count} Termine exportiert`)
+    } catch (e) {
+      showToast(`Export fehlgeschlagen: ${e}`)
+    }
+  }
+
+  const refreshContacts = useCallback(() => {
+    setLoadingContacts(true)
+    api
+      .listContacts()
+      .then(setContacts)
+      .catch((e) => showToast(`Kontakte konnten nicht geladen werden: ${e}`))
+      .finally(() => setLoadingContacts(false))
+  }, [showToast])
+
+  const refreshContactGroups = useCallback(() => {
+    api
+      .listContactGroups()
+      .then(setContactGroups)
+      .catch((e) => showToast(`Gruppen konnten nicht geladen werden: ${e}`))
+  }, [showToast])
+
+  useEffect(() => {
+    if (view === 'contacts') {
+      refreshContacts()
+      refreshContactGroups()
+    }
+  }, [view, refreshContacts, refreshContactGroups])
+
+  async function handleSaveContactGroup(data: NewContactGroup, existingId: string | null) {
+    if (existingId) {
+      await api.updateContactGroup({ id: existingId, ...data })
+    } else {
+      await api.createContactGroup(data)
+    }
+    showToast(existingId ? 'Gruppe aktualisiert' : 'Gruppe erstellt')
+    refreshContactGroups()
+  }
+
+  async function handleDeleteContactGroup(group: ContactGroup) {
+    await api.deleteContactGroup(group.id)
+    setContactGroups((prev) => prev.filter((g) => g.id !== group.id))
+    showToast('Gruppe gelöscht')
+  }
+
+  function handleComposeToEmails(emails: string[]) {
+    startCompose({ to: emails.join(', ') }, selectedAccountId)
+  }
+
+  function handleAddContactClick() {
+    setEditingContact(null)
+    setContactModalOpen(true)
+  }
+
+  function handleEditContactClick(c: Contact) {
+    setEditingContact(c)
+    setContactModalOpen(true)
+  }
+
+  async function handleSaveContact(data: NewContact, existingId: string | null) {
+    if (existingId) {
+      const existing = contacts.find((c) => c.id === existingId)
+      await api.updateContact({
+        id: existingId,
+        name: data.name,
+        email: data.email ?? null,
+        phone: data.phone ?? null,
+        address: data.address ?? null,
+        company: data.company ?? null,
+        notes: data.notes ?? null,
+        favorite: existing?.favorite ?? false,
+      })
+    } else {
+      await api.addContact(data)
+    }
+    setContactModalOpen(false)
+    showToast(existingId ? 'Kontakt aktualisiert' : 'Kontakt hinzugefügt')
+    refreshContacts()
+  }
+
+  async function handleDeleteContact(c: Contact) {
+    await api.deleteContact(c.id)
+    setContactModalOpen(false)
+    setContacts((prev) => prev.filter((x) => x.id !== c.id))
+    showToast('Kontakt gelöscht')
+  }
+
+  async function handleToggleContactFavorite(c: Contact) {
+    const next = !c.favorite
+    setContacts((prev) => prev.map((x) => (x.id === c.id ? { ...x, favorite: next } : x)))
+    try {
+      await api.toggleContactFavorite(c.id, next)
+    } catch (e) {
+      showToast(`Fehlgeschlagen: ${e}`)
+    }
+  }
+
+  function handleComposeToContact(c: Contact) {
+    if (!c.email) return
+    startCompose({ to: c.email }, selectedAccountId)
+  }
+
+  function handleContactContextMenu(e: React.MouseEvent, c: Contact) {
+    const sections: ContextMenuSection[] = [
+      [
+        { label: 'Bearbeiten', icon: <Pencil size={13} />, onClick: () => handleEditContactClick(c) },
+        {
+          label: c.favorite ? 'Favorit entfernen' : 'Als Favorit',
+          icon: <Star size={13} />,
+          onClick: () => handleToggleContactFavorite(c),
+        },
+        {
+          label: 'Mail schreiben',
+          icon: <Mail size={13} />,
+          disabled: !c.email,
+          onClick: () => handleComposeToContact(c),
+        },
+      ],
+      [
+        {
+          label: 'Löschen',
+          icon: <Trash2 size={13} />,
+          danger: true,
+          onClick: () => {
+            if (window.confirm(`Kontakt „${c.name || c.email || c.phone}“ wirklich löschen?`)) handleDeleteContact(c)
+          },
+        },
+      ],
+    ]
+    openMenu(e, sections)
+  }
+
+  const refreshTasks = useCallback(() => {
+    setLoadingTasks(true)
+    api
+      .listTasks()
+      .then(setTasks)
+      .catch((e) => showToast(`Aufgaben konnten nicht geladen werden: ${e}`))
+      .finally(() => setLoadingTasks(false))
+  }, [showToast])
+
+  useEffect(() => {
+    if (view === 'tasks') refreshTasks()
+  }, [view, refreshTasks])
+
+  function handleAddTaskClick() {
+    setEditingTask(null)
+    setTaskModalOpen(true)
+  }
+
+  function handleEditTaskClick(task: Task) {
+    setEditingTask(task)
+    setTaskModalOpen(true)
+  }
+
+  async function handleSaveTask(data: NewTask, existingId: string | null) {
+    if (existingId) {
+      const existing = tasks.find((t) => t.id === existingId)
+      if (!existing) return
+      await api.updateTask({ ...existing, ...data, description: data.description ?? null, due_ts: data.due_ts ?? null })
+    } else {
+      await api.createTask(data)
+    }
+    setTaskModalOpen(false)
+    showToast(existingId ? 'Aufgabe aktualisiert' : 'Aufgabe erstellt')
+    refreshTasks()
+  }
+
+  async function handleDeleteTask(task: Task) {
+    await api.deleteTask(task.id)
+    setTaskModalOpen(false)
+    setTasks((prev) => prev.filter((t) => t.id !== task.id))
+    showToast('Aufgabe gelöscht')
+  }
+
+  async function handleToggleTaskCompleted(task: Task) {
+    const next = !task.completed
+    setTasks((prev) => prev.map((t) => (t.id === task.id ? { ...t, completed: next } : t)))
+    try {
+      await api.setTaskCompleted(task.id, next)
+    } catch (e) {
+      showToast(`Fehlgeschlagen: ${e}`)
+    }
+  }
+
+  async function handleCreateTaskFromMessage(m: Pick<MessageFull, 'account_id' | 'folder' | 'uid' | 'subject'>) {
+    try {
+      await api.createTaskFromMessage(m.account_id, m.folder, m.uid, m.subject || '(kein Betreff)')
+      showToast('Aufgabe erstellt')
+      if (view === 'tasks') refreshTasks()
+    } catch (e) {
+      showToast(`Fehlgeschlagen: ${e}`)
+    }
+  }
+
+  const selectedAccount = accounts.find((a) => a.id === selectedAccountId) ?? null
+  const composeAccount = accounts.find((a) => a.id === composeAccountId) ?? null
+  const isSearching = searchQuery.trim().length > 0 || hasAdvancedFilters
+  const displayedMessages = isSearching ? searchResults : unifiedInbox ? unifiedMessages : messages
+  const visibleMessages = applyEmailFilter(displayedMessages, emailFilter)
+  const currentFolders = selectedMessage
+    ? accountFolders[selectedMessage.account_id] ?? []
+    : selectedAccountId
+      ? accountFolders[selectedAccountId] ?? []
+      : []
+  const selectedSummary = selectedMessage
+    ? visibleMessages.find(
+        (x) => x.uid === selectedMessage.uid && x.folder === selectedMessage.folder && x.account_id === selectedMessage.account_id,
+      ) ?? null
+    : null
+
+  return (
+    <div className="flex h-screen w-screen flex-col overflow-hidden bg-white text-zinc-800 dark:bg-zinc-950 dark:text-zinc-100">
+      <Ribbon
+        view={view}
+        onChangeView={setView}
+        selectedMessage={selectedMessage}
+        selectedSummary={selectedSummary}
+        selectionCount={selectedKeys.size}
+        folders={currentFolders}
+        currentAccountId={selectedAccountId}
+        accounts={accounts}
+        onCompose={handleCompose}
+        composeDisabled={!selectedAccountId || selectedAccount?.protocol === 'local'}
+        onReply={handleReply}
+        onReplyAll={handleReplyAll}
+        onForward={handleForward}
+        onDelete={() => {
+          if (selectedKeys.size > 1) handleBulkDelete()
+          else if (selectedMessage) handleDeleteMessage(selectedMessage)
+        }}
+        onArchive={handleArchive}
+        onMove={(target) => {
+          if (selectedKeys.size > 1) handleBulkMove(target)
+          else if (selectedMessage) handleMove(selectedMessage, target)
+        }}
+        onToggleRead={() => {
+          if (selectedKeys.size > 1) handleBulkMarkRead(false)
+          else if (selectedMessage) handleMarkUnread(selectedMessage)
+        }}
+        onMarkDone={handleMarkDone}
+        onToggleFlag={() => {
+          if (selectedKeys.size > 1) handleBulkFlag()
+          else if (selectedSummary) handleToggleFlag(selectedSummary)
+        }}
+        onSetCategory={handleRibbonSetCategory}
+        onRefresh={handleRefresh}
+        onRefreshAll={handleRefreshAll}
+        refreshing={refreshing}
+        offlineMode={offlineMode}
+        onToggleOffline={handleToggleOffline}
+        emailFilter={emailFilter}
+        onEmailFilterChange={setEmailFilter}
+        onAddContact={handleAddContactClick}
+        onNewFolder={handleNewFolder}
+        onRenameFolder={handleRenameFolder}
+        onDeleteFolder={handleDeleteFolder}
+        onMarkFolderRead={handleMarkFolderRead}
+        onApplyRulesToFolder={handleApplyRulesToFolder}
+        onManageRules={() => setRulesModalOpen(true)}
+        onManageBlocked={() => setBlockedSendersModalOpen(true)}
+        onShowSnoozed={() => setSnoozedModalOpen(true)}
+        onShowShortcuts={() => setShortcutsModalOpen(true)}
+        onSortFoldersAZ={handleSortFoldersAZ}
+        onAddFavorite={handleAddFavoriteCurrent}
+        onNewSearchFolder={handleNewSearchFolder}
+        groupConversations={groupConversations}
+        onGroupConversationsChange={handleGroupConversationsChange}
+        density={density}
+        onDensityChange={handleDensityChange}
+        sidebarCollapsed={sidebarCollapsed}
+        onToggleSidebar={() => setSidebarCollapsed((v) => !v)}
+        sortBy={sortBy}
+        sortDesc={sortDesc}
+        onSortByChange={setSortBy}
+        onToggleSortDesc={() => setSortDesc((v) => !v)}
+        onResetView={handleResetView}
+        onNewTask={handleAddTaskClick}
+        onNewEvent={handleNewEvent}
+        onGoToToday={() => setMonthDate(new Date())}
+        onImportIcs={handleImportIcs}
+        onExportIcs={handleExportIcs}
+        googleAccounts={accounts.filter((a) => a.auth_method === 'google_oauth')}
+        onSyncGoogleCalendar={handleSyncGoogleCalendar}
+        onReconnectGoogleAccount={handleReconnectGoogleAccount}
+        onOpenCaldav={() => setCaldavModalOpen(true)}
+        theme={theme}
+        onThemeChange={handleThemeChange}
+        onOpenSettings={() => setSettingsModalOpen(true)}
+      />
+      <div className="flex min-h-0 flex-1 overflow-hidden">
+        {!sidebarCollapsed && (
+          <Sidebar
+            accounts={accounts}
+            accountFolders={accountFolders}
+            expandedAccounts={expandedAccounts}
+            onToggleExpand={handleToggleExpand}
+            selectedAccountId={selectedAccountId}
+            selectedFolder={selectedFolder}
+            onSelectFolder={handleSelectFolder}
+            favorites={favorites}
+            onToggleFavorite={handleToggleFavoriteFolder}
+            onFolderContextMenu={handleFolderContextMenu}
+            onDropMessagesOnFolder={(accountId, folder) => handleDropMessagesOnFolder(accountId, folder.name)}
+            onAddAccount={() => setAccountModalOpen(true)}
+            onRefresh={handleRefresh}
+            refreshing={refreshing}
+            view={view}
+            onChangeView={setView}
+            onExportFolder={handleExportFolder}
+            onFullBackup={handleFullBackup}
+            onOpenImport={() => setImportModalOpen(true)}
+            onManageRules={() => setRulesModalOpen(true)}
+            onOpenAccountSettings={setSettingsAccount}
+            compact={density === 'compact'}
+            savedSearches={savedSearches}
+            onSelectSavedSearch={(q) => {
+              setUnifiedInbox(false)
+              setSearchQuery(q)
+            }}
+            onDeleteSavedSearch={handleDeleteSavedSearch}
+            unifiedInboxActive={unifiedInbox}
+            onSelectUnifiedInbox={handleSelectUnifiedInbox}
+          />
+        )}
+        {view === 'mail' ? (
+          <>
+            <MessageList
+              messages={visibleMessages}
+              selectedKeys={selectedKeys}
+              onRowClick={handleRowClick}
+              onToggleFlag={handleToggleFlag}
+              onSetCategory={handleSetMessageCategory}
+              onContextMenu={handleMessageContextMenu}
+              onDragStartMessage={handleMessageDragStart}
+              loading={isSearching ? searching : loadingMessages}
+              searchQuery={searchQuery}
+              onSearchChange={setSearchQuery}
+              advancedSearch={advancedSearch}
+              onAdvancedSearchChange={setAdvancedSearch}
+              compact={density === 'compact'}
+              groupConversations={groupConversations}
+              accounts={accounts}
+              sortBy={sortBy}
+              sortDesc={sortDesc}
+              forceAccountBadge={unifiedInbox}
+            />
+            {composing ? (
+              <ComposePane
+                account={composeAccount}
+                accounts={accounts}
+                onAccountChange={setComposeAccountId}
+                initial={composeInitial}
+                onDiscard={handleDiscardCompose}
+                onSend={handleSend}
+                onDraftSaved={handleDraftSaved}
+                sending={sending}
+              />
+            ) : (
+              <ReadingPane
+                message={selectedMessage}
+                loading={loadingMessage}
+                selectionCount={selectedKeys.size}
+                onImportIcsAttachment={handleImportIcsAttachment}
+                onCreateTask={handleCreateTaskFromMessage}
+                onReplyToInvite={handleReplyToInvite}
+              />
+            )}
+          </>
+        ) : view === 'contacts' ? (
+          <ContactsView
+            contacts={contacts}
+            groups={contactGroups}
+            loading={loadingContacts}
+            onAdd={handleAddContactClick}
+            onEdit={handleEditContactClick}
+            onToggleFavorite={handleToggleContactFavorite}
+            onCompose={handleComposeToContact}
+            onContextMenu={handleContactContextMenu}
+            onComposeToEmails={handleComposeToEmails}
+            onManageGroups={() => setContactGroupModalOpen(true)}
+            onRefresh={refreshContacts}
+            onToast={showToast}
+            googleAccounts={accounts.filter((a) => a.auth_method === 'google_oauth')}
+            onSyncGoogleContacts={handleSyncGoogleContacts}
+            onReconnectGoogleAccount={handleReconnectGoogleAccount}
+          />
+        ) : view === 'calendar' ? (
+          <CalendarView
+            monthDate={monthDate}
+            events={events}
+            loading={loadingEvents}
+            onPrevMonth={() => setMonthDate((d) => new Date(d.getFullYear(), d.getMonth() - 1, 1))}
+            onNextMonth={() => setMonthDate((d) => new Date(d.getFullYear(), d.getMonth() + 1, 1))}
+            onToday={() => setMonthDate(new Date())}
+            onDayClick={handleDayClick}
+            onEventClick={handleEventClick}
+            onEventContextMenu={handleEventContextMenu}
+          />
+        ) : (
+          <TasksView
+            tasks={tasks}
+            loading={loadingTasks}
+            onAdd={handleAddTaskClick}
+            onEdit={handleEditTaskClick}
+            onToggleCompleted={handleToggleTaskCompleted}
+          />
+        )}
+      </div>
+
+      <ImportModal
+        open={importModalOpen}
+        accounts={accounts}
+        onClose={() => setImportModalOpen(false)}
+        onImported={handleImported}
+      />
+
+      <RulesModal
+        open={rulesModalOpen}
+        onClose={() => setRulesModalOpen(false)}
+        accounts={accounts}
+        accountFolders={accountFolders}
+        onToast={showToast}
+      />
+
+      <BlockedSendersModal
+        open={blockedSendersModalOpen}
+        onClose={() => setBlockedSendersModalOpen(false)}
+        onToast={showToast}
+      />
+
+      <SnoozedModal
+        open={snoozedModalOpen}
+        onClose={() => setSnoozedModalOpen(false)}
+        onToast={showToast}
+        onOpenMessage={handleOpenSnoozedMessage}
+      />
+
+      <ContactModal
+        open={contactModalOpen}
+        contact={editingContact}
+        onClose={() => setContactModalOpen(false)}
+        onSave={handleSaveContact}
+        onDelete={handleDeleteContact}
+      />
+
+      <ContactGroupModal
+        open={contactGroupModalOpen}
+        contacts={contacts}
+        groups={contactGroups}
+        onClose={() => setContactGroupModalOpen(false)}
+        onSave={handleSaveContactGroup}
+        onDelete={handleDeleteContactGroup}
+      />
+
+      <AccountModal
+        open={accountModalOpen}
+        onClose={() => setAccountModalOpen(false)}
+        onAdd={handleAddAccount}
+        onGoogleAdd={handleGoogleOAuthAdd}
+      />
+
+      <AccountSettingsModal
+        account={settingsAccount}
+        onClose={() => setSettingsAccount(null)}
+        onSave={handleUpdateAccount}
+        onDelete={handleDeleteAccount}
+      />
+
+      <EventModal
+        open={eventModalOpen}
+        event={editingEvent}
+        defaultDate={eventDefaultDate}
+        googleAccounts={accounts.filter((a) => a.auth_method === 'google_oauth')}
+        caldavAccounts={caldavAccounts}
+        isOccurrenceEdit={editingOccurrenceStart !== null}
+        onClose={() => setEventModalOpen(false)}
+        onSave={handleSaveEvent}
+        onDelete={editingOccurrenceStart !== null ? handleDeleteOccurrence : handleDeleteEvent}
+      />
+
+      <CaldavModal
+        open={caldavModalOpen}
+        onClose={() => setCaldavModalOpen(false)}
+        onToast={showToast}
+        onSynced={() => {
+          refreshCaldavAccounts()
+          refreshEvents()
+        }}
+      />
+
+      <RecurrenceScopeModal
+        open={!!recurrenceScopeTarget}
+        title={recurrenceScopeTarget?.action === 'delete' ? 'Termin löschen' : 'Termin bearbeiten'}
+        onChoose={handleRecurrenceScopeChoice}
+        onCancel={() => setRecurrenceScopeTarget(null)}
+      />
+
+      <TaskModal
+        open={taskModalOpen}
+        task={editingTask}
+        onClose={() => setTaskModalOpen(false)}
+        onSave={handleSaveTask}
+        onDelete={handleDeleteTask}
+      />
+
+      <SettingsModal
+        open={settingsModalOpen}
+        settings={notifySettings}
+        onChange={handleAppSettingsChange}
+        onClose={() => setSettingsModalOpen(false)}
+      />
+
+      <ShortcutsModal open={shortcutsModalOpen} onClose={() => setShortcutsModalOpen(false)} />
+
+      <NewMailPopup
+        notification={newMailNotification}
+        onOpen={handleOpenNewMailNotification}
+        onDismiss={() => setNewMailNotification(null)}
+      />
+
+      {pendingSend && <UndoSendBanner deadline={pendingSend.deadline} onUndo={handleCancelSend} />}
+
+      <ContextMenu state={menuState} onClose={closeMenu} />
+
+      {toast && (
+        <div
+          className={`animate-toast-in fixed left-1/2 z-50 rounded-full border border-white/10 bg-zinc-900/95 px-5 py-2.5 text-[13px] font-medium text-white shadow-[0_12px_35px_-8px_rgba(0,0,0,0.5)] backdrop-blur-xl dark:border-black/10 dark:bg-zinc-100/95 dark:text-zinc-900 ${pendingSend ? 'bottom-20' : 'bottom-6'}`}
+        >
+          {toast}
+        </div>
+      )}
+    </div>
+  )
+}
diff --git a/src/ComposeWindow.tsx b/src/ComposeWindow.tsx
new file mode 100644
index 0000000..9a37505
--- /dev/null
+++ b/src/ComposeWindow.tsx
@@ -0,0 +1,104 @@
+import { useEffect, useRef, useState } from 'react'
+import { emit, emitTo, listen } from '@tauri-apps/api/event'
+import { getCurrentWebviewWindow } from '@tauri-apps/api/webviewWindow'
+import { ComposePane, type ComposeInitial } from './components/ComposePane'
+import { api } from './lib/api'
+import { applyTheme, loadTheme } from './lib/theme'
+import type { Account, ComposeMessage } from './types'
+
+const LOCAL_ACCOUNT_ID = 'local'
+const DRAFTS_FOLDER = 'Entwürfe'
+
+/// Root component for a detached "popup" compose/reply window (a real OS
+/// window, not an overlay) — see main.tsx's `?compose=1` routing. Runs in a
+/// fully separate JS/React context from the main window, so it fetches its
+/// own account list and receives its initial content via a `compose-init`
+/// event emitted by the main window once this window signals `compose-ready`.
+export function ComposeWindow() {
+  const [accounts, setAccounts] = useState<Account[]>([])
+  const [ready, setReady] = useState(false)
+  const [initial, setInitial] = useState<ComposeInitial | null>(null)
+  const [accountId, setAccountId] = useState<string | null>(null)
+  const [sending, setSending] = useState(false)
+  const draftUidRef = useRef<number | null>(null)
+
+  useEffect(() => {
+    applyTheme(loadTheme())
+    api.listAccounts().then(setAccounts).catch(() => {})
+
+    const win = getCurrentWebviewWindow()
+    const unlistenPromise = listen<{ initial: ComposeInitial | null; accountId: string | null }>(
+      'compose-init',
+      (event) => {
+        setInitial(event.payload.initial)
+        setAccountId(event.payload.accountId)
+        draftUidRef.current = event.payload.initial?.draftUid ?? null
+        setReady(true)
+      },
+    )
+    emit('compose-ready', { label: win.label })
+
+    return () => {
+      unlistenPromise.then((f) => f())
+    }
+  }, [])
+
+  function cleanupDraft() {
+    const uid = draftUidRef.current
+    if (uid == null) return
+    api.deleteMessage(LOCAL_ACCOUNT_ID, DRAFTS_FOLDER, uid).catch(() => {})
+  }
+
+  async function handleSend(msg: ComposeMessage, sendAt: number) {
+    setSending(true)
+    try {
+      const id = await api.sendMessageAt(msg, sendAt)
+      // Actual sending (and draft cleanup) happens backend-side on its own
+      // timer, independent of this window — the main window picks it up via
+      // `scheduled-send-completed` and owns the undo banner from here on.
+      await emitTo('main', 'compose-scheduled', {
+        id,
+        deadline: sendAt,
+        draftUid: draftUidRef.current,
+        accountId: msg.account_id,
+      })
+      getCurrentWebviewWindow().close()
+    } finally {
+      setSending(false)
+    }
+  }
+
+  function handleDiscard() {
+    cleanupDraft()
+    getCurrentWebviewWindow().close()
+  }
+
+  function handleDraftSaved(uid: number) {
+    draftUidRef.current = uid
+  }
+
+  const account = accounts.find((a) => a.id === accountId) ?? null
+
+  if (!ready || accounts.length === 0) {
+    return (
+      <div className="flex h-screen w-screen items-center justify-center bg-white text-sm text-zinc-400 dark:bg-zinc-950 dark:text-zinc-500">
+        Lade…
+      </div>
+    )
+  }
+
+  return (
+    <div className="flex h-screen w-screen flex-col overflow-hidden bg-white text-zinc-800 dark:bg-zinc-950 dark:text-zinc-100">
+      <ComposePane
+        account={account}
+        accounts={accounts}
+        onAccountChange={setAccountId}
+        initial={initial}
+        onDiscard={handleDiscard}
+        onSend={handleSend}
+        onDraftSaved={handleDraftSaved}
+        sending={sending}
+      />
+    </div>
+  )
+}
diff --git a/src/components/AccountModal.tsx b/src/components/AccountModal.tsx
new file mode 100644
index 0000000..1b21f91
--- /dev/null
+++ b/src/components/AccountModal.tsx
@@ -0,0 +1,293 @@
+import { useEffect, useState } from 'react'
+import { Globe, Info, X } from 'lucide-react'
+import clsx from 'clsx'
+import { providerPresets, type ProviderPreset } from '../lib/providers'
+import type { NewAccount, Protocol } from '../types'
+import { ProviderIcon } from './ProviderIcons'
+
+function Field({
+  label,
+  children,
+}: {
+  label: string
+  children: React.ReactNode
+}) {
+  return (
+    <label className="flex flex-col gap-1">
+      <span className="text-[11.5px] font-medium text-zinc-500 dark:text-zinc-400">{label}</span>
+      {children}
+    </label>
+  )
+}
+
+const inputClass =
+  'rounded-lg border border-zinc-200 bg-white px-3 py-1.5 text-[13px] text-zinc-800 outline-none transition focus:border-indigo-400 focus:ring-2 focus:ring-indigo-100 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-100 dark:focus:ring-indigo-500/20'
+
+export function AccountModal({
+  open,
+  onClose,
+  onAdd,
+  onGoogleAdd,
+}: {
+  open: boolean
+  onClose: () => void
+  onAdd: (account: NewAccount) => Promise<void>
+  onGoogleAdd: () => Promise<void>
+}) {
+  const [googleLoading, setGoogleLoading] = useState(false)
+  const [preset, setPreset] = useState<ProviderPreset>(providerPresets[0])
+  const [label, setLabel] = useState('')
+  const [email, setEmail] = useState('')
+  const [username, setUsername] = useState('')
+  const [password, setPassword] = useState('')
+  const [protocol, setProtocol] = useState<Protocol>(preset.protocol)
+  const [incomingHost, setIncomingHost] = useState(preset.incoming_host)
+  const [incomingPort, setIncomingPort] = useState(preset.incoming_port)
+  const [smtpHost, setSmtpHost] = useState(preset.smtp_host)
+  const [smtpPort, setSmtpPort] = useState(preset.smtp_port)
+  const [smtpStartTls, setSmtpStartTls] = useState(preset.smtp_starttls)
+  const [saving, setSaving] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+
+  useEffect(() => {
+    if (open) {
+      const first = providerPresets[0]
+      setPreset(first)
+      applyPreset(first)
+      setLabel('')
+      setEmail('')
+      setUsername('')
+      setPassword('')
+      setError(null)
+    }
+  }, [open])
+
+  function applyPreset(p: ProviderPreset) {
+    setPreset(p)
+    setProtocol(p.protocol)
+    setIncomingHost(p.incoming_host)
+    setIncomingPort(p.incoming_port)
+    setSmtpHost(p.smtp_host)
+    setSmtpPort(p.smtp_port)
+    setSmtpStartTls(p.smtp_starttls)
+  }
+
+  if (!open) return null
+
+  async function handleGoogleLogin() {
+    setError(null)
+    setGoogleLoading(true)
+    try {
+      await onGoogleAdd()
+    } catch (err) {
+      setError(String(err))
+    } finally {
+      setGoogleLoading(false)
+    }
+  }
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault()
+    setError(null)
+    setSaving(true)
+    try {
+      await onAdd({
+        label: label.trim() || email.trim(),
+        email: email.trim(),
+        username: username.trim() || email.trim(),
+        password,
+        protocol,
+        incoming_host: incomingHost.trim(),
+        incoming_port: incomingPort,
+        smtp_host: smtpHost.trim(),
+        smtp_port: smtpPort,
+        smtp_starttls: smtpStartTls,
+      })
+    } catch (err) {
+      setError(String(err))
+      setSaving(false)
+      return
+    }
+    setSaving(false)
+  }
+
+  return (
+    <div className="animate-overlay-in fixed inset-0 z-50 flex items-center justify-center bg-zinc-900/40 p-6 backdrop-blur-sm dark:bg-black/60">
+      <form
+        onSubmit={handleSubmit}
+        className="animate-panel-in flex max-h-[85vh] w-full max-w-md flex-col overflow-hidden rounded-[28px] border border-white/70 bg-white/95 shadow-[0_24px_70px_-12px_rgba(15,15,25,0.35)] ring-1 ring-black/[0.03] backdrop-blur-2xl dark:border-white/10 dark:bg-zinc-900/90 dark:shadow-[0_24px_70px_-12px_rgba(0,0,0,0.6)]"
+      >
+        <div className="flex items-center justify-between border-b border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <h2 className="text-[15px] font-semibold tracking-tight text-zinc-800 dark:text-zinc-100">
+            Konto hinzufügen
+          </h2>
+          <button
+            type="button"
+            onClick={onClose}
+            className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+          >
+            <X size={16} />
+          </button>
+        </div>
+
+        <div className="flex-1 space-y-4 overflow-y-auto px-6 py-5">
+          <div className="grid grid-cols-3 gap-2">
+            {providerPresets.map((p) => (
+              <button
+                type="button"
+                key={p.id}
+                onClick={() => applyPreset(p)}
+                className={clsx(
+                  'flex flex-col items-center gap-1.5 rounded-2xl border px-2 py-3 text-center transition',
+                  preset.id === p.id
+                    ? 'border-indigo-300 bg-indigo-50 shadow-[0_0_0_3px] shadow-indigo-100 dark:border-indigo-500 dark:bg-indigo-500/10 dark:shadow-indigo-500/10'
+                    : 'border-zinc-200/80 hover:border-zinc-300 hover:bg-zinc-50 dark:border-zinc-800 dark:hover:bg-zinc-800',
+                )}
+              >
+                <ProviderIcon id={p.id} />
+                <span className="text-[10.5px] leading-tight font-medium text-zinc-600 dark:text-zinc-300">
+                  {p.label}
+                </span>
+              </button>
+            ))}
+          </div>
+
+          {preset.id === 'gmail' && (
+            <div className="space-y-3">
+              <button
+                type="button"
+                onClick={handleGoogleLogin}
+                disabled={googleLoading}
+                className="flex w-full items-center justify-center gap-2 rounded-full border border-zinc-200 bg-white px-4 py-2.5 text-[13px] font-medium text-zinc-700 shadow-sm transition hover:bg-zinc-50 disabled:cursor-not-allowed disabled:opacity-60 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-200 dark:hover:bg-zinc-800"
+              >
+                <Globe size={15} className={clsx(googleLoading && 'animate-spin')} />
+                {googleLoading ? 'Öffne Browser…' : 'Mit Google anmelden'}
+              </button>
+              <div className="flex items-center gap-2 text-[11px] text-zinc-400">
+                <div className="h-px flex-1 bg-zinc-200 dark:bg-zinc-800" />
+                oder manuell mit App-Passwort
+                <div className="h-px flex-1 bg-zinc-200 dark:bg-zinc-800" />
+              </div>
+            </div>
+          )}
+
+          {preset.hint && (
+            <div className="flex items-start gap-2 rounded-lg bg-amber-50 px-3 py-2 text-[11.5px] text-amber-700 dark:bg-amber-500/10 dark:text-amber-400">
+              <Info size={13} className="mt-0.5 shrink-0" />
+              <span>{preset.hint}</span>
+            </div>
+          )}
+
+          <div className="grid grid-cols-2 gap-3">
+            <Field label="Anzeigename">
+              <input className={inputClass} value={label} onChange={(e) => setLabel(e.target.value)} placeholder="Privat" />
+            </Field>
+            <Field label="E-Mail-Adresse">
+              <input
+                className={inputClass}
+                type="email"
+                required
+                value={email}
+                onChange={(e) => setEmail(e.target.value)}
+                placeholder="du@example.com"
+              />
+            </Field>
+          </div>
+
+          <div className="grid grid-cols-2 gap-3">
+            <Field label="Benutzername (optional)">
+              <input
+                className={inputClass}
+                value={username}
+                onChange={(e) => setUsername(e.target.value)}
+                placeholder="= E-Mail-Adresse"
+              />
+            </Field>
+            <Field label="Passwort / App-Passwort">
+              <input
+                className={inputClass}
+                type="password"
+                required
+                value={password}
+                onChange={(e) => setPassword(e.target.value)}
+              />
+            </Field>
+          </div>
+
+          <div className="rounded-2xl border border-zinc-200/80 bg-zinc-50/60 p-3.5 dark:border-zinc-800 dark:bg-zinc-950/40">
+            <p className="mb-2 text-[11px] font-semibold tracking-wide text-zinc-400 uppercase">
+              Server-Einstellungen
+            </p>
+            <div className="grid grid-cols-2 gap-3">
+              <Field label="Protokoll">
+                <select
+                  className={inputClass}
+                  value={protocol}
+                  onChange={(e) => setProtocol(e.target.value as Protocol)}
+                >
+                  <option value="imap">IMAP</option>
+                  <option value="pop3">POP3</option>
+                </select>
+              </Field>
+              <div />
+              <Field label={protocol === 'imap' ? 'IMAP-Server' : 'POP3-Server'}>
+                <input className={inputClass} value={incomingHost} onChange={(e) => setIncomingHost(e.target.value)} />
+              </Field>
+              <Field label="Port">
+                <input
+                  className={inputClass}
+                  type="number"
+                  value={incomingPort}
+                  onChange={(e) => setIncomingPort(Number(e.target.value))}
+                />
+              </Field>
+              <Field label="SMTP-Server">
+                <input className={inputClass} value={smtpHost} onChange={(e) => setSmtpHost(e.target.value)} />
+              </Field>
+              <Field label="SMTP-Port">
+                <input
+                  className={inputClass}
+                  type="number"
+                  value={smtpPort}
+                  onChange={(e) => setSmtpPort(Number(e.target.value))}
+                />
+              </Field>
+            </div>
+            <label className="mt-2.5 flex items-center gap-2 text-[12px] text-zinc-500 dark:text-zinc-400">
+              <input
+                type="checkbox"
+                checked={smtpStartTls}
+                onChange={(e) => setSmtpStartTls(e.target.checked)}
+                className="rounded border-zinc-300"
+              />
+              SMTP über STARTTLS (Port 587) statt direktem TLS (Port 465)
+            </label>
+          </div>
+
+          {error && (
+            <p className="rounded-lg bg-red-50 px-3 py-2 text-[12px] text-red-600 dark:bg-red-950/40 dark:text-red-400">
+              {error}
+            </p>
+          )}
+        </div>
+
+        <div className="flex justify-end gap-2 border-t border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <button
+            type="button"
+            onClick={onClose}
+            className="rounded-full px-4 py-2 text-[13px] font-medium text-zinc-500 transition hover:bg-zinc-100 dark:hover:bg-zinc-800"
+          >
+            Abbrechen
+          </button>
+          <button
+            type="submit"
+            disabled={saving}
+            className="rounded-full bg-gradient-to-b from-indigo-500 to-indigo-600 px-5 py-2 text-[13px] font-medium text-white shadow-lg shadow-indigo-600/25 transition hover:from-indigo-400 hover:to-indigo-500 hover:shadow-indigo-600/35 active:scale-[0.98] disabled:opacity-60"
+          >
+            {saving ? 'Verbinde…' : 'Konto hinzufügen'}
+          </button>
+        </div>
+      </form>
+    </div>
+  )
+}
diff --git a/src/components/AccountSettingsModal.tsx b/src/components/AccountSettingsModal.tsx
new file mode 100644
index 0000000..18ed40f
--- /dev/null
+++ b/src/components/AccountSettingsModal.tsx
@@ -0,0 +1,413 @@
+import { useEffect, useState } from 'react'
+import { AlertTriangle, PlaneTakeoff, Trash2, X } from 'lucide-react'
+import type { Account, Protocol } from '../types'
+import { loadSignature, saveSignature } from '../lib/signature'
+import { api } from '../lib/api'
+
+function toDateTimeLocal(ts: number | null): string {
+  if (!ts) return ''
+  const d = new Date(ts * 1000)
+  const pad = (n: number) => String(n).padStart(2, '0')
+  return `${d.getFullYear()}-${pad(d.getMonth() + 1)}-${pad(d.getDate())}T${pad(d.getHours())}:${pad(d.getMinutes())}`
+}
+
+function fromDateTimeLocal(v: string): number | null {
+  if (!v) return null
+  const ts = Math.floor(new Date(v).getTime() / 1000)
+  return Number.isNaN(ts) ? null : ts
+}
+
+function Field({ label, children }: { label: string; children: React.ReactNode }) {
+  return (
+    <label className="flex flex-col gap-1">
+      <span className="text-[11.5px] font-medium text-zinc-500 dark:text-zinc-400">{label}</span>
+      {children}
+    </label>
+  )
+}
+
+const inputClass =
+  'rounded-lg border border-zinc-200 bg-white px-3 py-1.5 text-[13px] text-zinc-800 outline-none transition focus:border-indigo-400 focus:ring-2 focus:ring-indigo-100 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-100 dark:focus:ring-indigo-500/20'
+
+export function AccountSettingsModal({
+  account,
+  onClose,
+  onSave,
+  onDelete,
+}: {
+  account: Account | null
+  onClose: () => void
+  onSave: (account: Account, newPassword?: string) => Promise<void>
+  onDelete: (account: Account) => Promise<void>
+}) {
+  const [label, setLabel] = useState('')
+  const [username, setUsername] = useState('')
+  const [protocol, setProtocol] = useState<Protocol>('imap')
+  const [incomingHost, setIncomingHost] = useState('')
+  const [incomingPort, setIncomingPort] = useState(0)
+  const [smtpHost, setSmtpHost] = useState('')
+  const [smtpPort, setSmtpPort] = useState(0)
+  const [smtpStartTls, setSmtpStartTls] = useState(false)
+  const [newPassword, setNewPassword] = useState('')
+  const [signature, setSignature] = useState('')
+  const [saving, setSaving] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+  const [confirmDelete, setConfirmDelete] = useState(false)
+  const [deleting, setDeleting] = useState(false)
+
+  const [vacationEnabled, setVacationEnabled] = useState(false)
+  const [vacationStart, setVacationStart] = useState('')
+  const [vacationEnd, setVacationEnd] = useState('')
+  const [vacationSubject, setVacationSubject] = useState('')
+  const [vacationBody, setVacationBody] = useState('')
+  const [vacationSaving, setVacationSaving] = useState(false)
+
+  useEffect(() => {
+    if (account) {
+      setLabel(account.label)
+      setUsername(account.username)
+      setProtocol(account.protocol)
+      setIncomingHost(account.incoming_host)
+      setIncomingPort(account.incoming_port)
+      setSmtpHost(account.smtp_host)
+      setSmtpPort(account.smtp_port)
+      setSmtpStartTls(account.smtp_starttls)
+      setNewPassword('')
+      setSignature(loadSignature(account.id))
+      setError(null)
+      setConfirmDelete(false)
+      if (account.protocol === 'imap') {
+        api
+          .getVacationSettings(account.id)
+          .then((s) => {
+            setVacationEnabled(s.enabled)
+            setVacationStart(toDateTimeLocal(s.start_ts))
+            setVacationEnd(toDateTimeLocal(s.end_ts))
+            setVacationSubject(s.subject)
+            setVacationBody(s.body)
+          })
+          .catch(() => {})
+      }
+    }
+  }, [account])
+
+  async function handleSaveVacation() {
+    if (!account) return
+    setVacationSaving(true)
+    try {
+      await api.saveVacationSettings(account.id, {
+        enabled: vacationEnabled,
+        start_ts: fromDateTimeLocal(vacationStart),
+        end_ts: fromDateTimeLocal(vacationEnd),
+        subject: vacationSubject,
+        body: vacationBody,
+      })
+    } catch (err) {
+      setError(String(err))
+    } finally {
+      setVacationSaving(false)
+    }
+  }
+
+  if (!account) return null
+
+  const isOAuth = account.auth_method === 'google_oauth'
+  const isLocal = account.protocol === 'local'
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault()
+    if (!account) return
+    setError(null)
+    setSaving(true)
+    try {
+      saveSignature(account.id, signature)
+      await onSave(
+        {
+          ...account,
+          label: label.trim() || account.email,
+          username: username.trim(),
+          protocol,
+          incoming_host: incomingHost.trim(),
+          incoming_port: incomingPort,
+          smtp_host: smtpHost.trim(),
+          smtp_port: smtpPort,
+          smtp_starttls: smtpStartTls,
+        },
+        newPassword.trim() || undefined,
+      )
+    } catch (err) {
+      setError(String(err))
+      setSaving(false)
+      return
+    }
+    setSaving(false)
+  }
+
+  async function handleDelete() {
+    if (!account) return
+    setDeleting(true)
+    try {
+      await onDelete(account)
+    } catch (err) {
+      setError(String(err))
+      setDeleting(false)
+    }
+  }
+
+  return (
+    <div className="animate-overlay-in fixed inset-0 z-50 flex items-center justify-center bg-zinc-900/40 p-6 backdrop-blur-sm dark:bg-black/60">
+      <form
+        onSubmit={handleSubmit}
+        className="animate-panel-in flex max-h-[85vh] w-full max-w-md flex-col overflow-hidden rounded-[28px] border border-white/70 bg-white/95 shadow-[0_24px_70px_-12px_rgba(15,15,25,0.35)] ring-1 ring-black/[0.03] backdrop-blur-2xl dark:border-white/10 dark:bg-zinc-900/90 dark:shadow-[0_24px_70px_-12px_rgba(0,0,0,0.6)]"
+      >
+        <div className="flex items-center justify-between border-b border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <h2 className="text-[15px] font-semibold tracking-tight text-zinc-800 dark:text-zinc-100">
+            Kontoeinstellungen
+          </h2>
+          <button
+            type="button"
+            onClick={onClose}
+            className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+          >
+            <X size={16} />
+          </button>
+        </div>
+
+        <div className="flex-1 space-y-4 overflow-y-auto px-6 py-5">
+          {isLocal ? (
+            <p className="rounded-lg bg-zinc-50 px-3 py-2.5 text-[12.5px] text-zinc-500 dark:bg-zinc-950/40 dark:text-zinc-400">
+              Die lokale Ablage ist ein Systemkonto und kann nicht bearbeitet oder gelöscht werden.
+            </p>
+          ) : (
+            <>
+              <div className="grid grid-cols-2 gap-3">
+                <Field label="Anzeigename">
+                  <input className={inputClass} value={label} onChange={(e) => setLabel(e.target.value)} />
+                </Field>
+                <Field label="E-Mail-Adresse">
+                  <input className={inputClass} value={account.email} disabled />
+                </Field>
+              </div>
+
+              {isOAuth ? (
+                <div className="rounded-lg bg-indigo-50 px-3 py-2.5 text-[12px] text-indigo-700 dark:bg-indigo-500/10 dark:text-indigo-300">
+                  Dieses Konto verwendet Google-Anmeldung (OAuth). Server-Einstellungen werden automatisch verwaltet.
+                </div>
+              ) : (
+                <>
+                  <div className="grid grid-cols-2 gap-3">
+                    <Field label="Benutzername">
+                      <input className={inputClass} value={username} onChange={(e) => setUsername(e.target.value)} />
+                    </Field>
+                    <Field label="Neues Passwort (optional)">
+                      <input
+                        className={inputClass}
+                        type="password"
+                        value={newPassword}
+                        onChange={(e) => setNewPassword(e.target.value)}
+                        placeholder="unverändert lassen"
+                      />
+                    </Field>
+                  </div>
+
+                  <div className="rounded-2xl border border-zinc-200/80 bg-zinc-50/60 p-3.5 dark:border-zinc-800 dark:bg-zinc-950/40">
+                    <p className="mb-2 text-[11px] font-semibold tracking-wide text-zinc-400 uppercase">
+                      Server-Einstellungen
+                    </p>
+                    <div className="grid grid-cols-2 gap-3">
+                      <Field label="Protokoll">
+                        <select
+                          className={inputClass}
+                          value={protocol}
+                          onChange={(e) => setProtocol(e.target.value as Protocol)}
+                        >
+                          <option value="imap">IMAP</option>
+                          <option value="pop3">POP3</option>
+                        </select>
+                      </Field>
+                      <div />
+                      <Field label={protocol === 'imap' ? 'IMAP-Server' : 'POP3-Server'}>
+                        <input className={inputClass} value={incomingHost} onChange={(e) => setIncomingHost(e.target.value)} />
+                      </Field>
+                      <Field label="Port">
+                        <input
+                          className={inputClass}
+                          type="number"
+                          value={incomingPort}
+                          onChange={(e) => setIncomingPort(Number(e.target.value))}
+                        />
+                      </Field>
+                      <Field label="SMTP-Server">
+                        <input className={inputClass} value={smtpHost} onChange={(e) => setSmtpHost(e.target.value)} />
+                      </Field>
+                      <Field label="SMTP-Port">
+                        <input
+                          className={inputClass}
+                          type="number"
+                          value={smtpPort}
+                          onChange={(e) => setSmtpPort(Number(e.target.value))}
+                        />
+                      </Field>
+                    </div>
+                    <label className="mt-2.5 flex items-center gap-2 text-[12px] text-zinc-500 dark:text-zinc-400">
+                      <input
+                        type="checkbox"
+                        checked={smtpStartTls}
+                        onChange={(e) => setSmtpStartTls(e.target.checked)}
+                        className="rounded border-zinc-300"
+                      />
+                      SMTP über STARTTLS statt direktem TLS
+                    </label>
+                  </div>
+                </>
+              )}
+
+              <Field label="Signatur">
+                <textarea
+                  value={signature}
+                  onChange={(e) => setSignature(e.target.value)}
+                  rows={3}
+                  className="w-full resize-none rounded-lg border border-zinc-200 bg-white px-3 py-2 text-[12.5px] text-zinc-700 outline-none focus:border-indigo-400 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-200"
+                  placeholder="z. B. Viele Grüße&#10;Dein Name"
+                />
+              </Field>
+
+              {protocol === 'imap' && (
+                <div className="rounded-2xl border border-zinc-200/80 bg-zinc-50/60 p-3.5 dark:border-zinc-800 dark:bg-zinc-950/40">
+                  <div className="mb-2 flex items-center justify-between">
+                    <p className="flex items-center gap-1.5 text-[11px] font-semibold tracking-wide text-zinc-400 uppercase">
+                      <PlaneTakeoff size={12} /> Abwesenheitsnotiz
+                    </p>
+                    <label className="flex items-center gap-1.5 text-[12px] text-zinc-500 dark:text-zinc-400">
+                      <input
+                        type="checkbox"
+                        checked={vacationEnabled}
+                        onChange={(e) => setVacationEnabled(e.target.checked)}
+                        className="rounded border-zinc-300"
+                      />
+                      Aktiv
+                    </label>
+                  </div>
+                  {vacationEnabled && (
+                    <div className="space-y-2.5">
+                      <div className="grid grid-cols-2 gap-2.5">
+                        <Field label="Von">
+                          <input
+                            type="datetime-local"
+                            className={inputClass}
+                            value={vacationStart}
+                            onChange={(e) => setVacationStart(e.target.value)}
+                          />
+                        </Field>
+                        <Field label="Bis">
+                          <input
+                            type="datetime-local"
+                            className={inputClass}
+                            value={vacationEnd}
+                            onChange={(e) => setVacationEnd(e.target.value)}
+                          />
+                        </Field>
+                      </div>
+                      <Field label="Betreff (optional, sonst „Automatische Antwort: …“)">
+                        <input
+                          className={inputClass}
+                          value={vacationSubject}
+                          onChange={(e) => setVacationSubject(e.target.value)}
+                          placeholder="Automatische Antwort"
+                        />
+                      </Field>
+                      <Field label="Nachricht">
+                        <textarea
+                          value={vacationBody}
+                          onChange={(e) => setVacationBody(e.target.value)}
+                          rows={3}
+                          className="w-full resize-none rounded-lg border border-zinc-200 bg-white px-3 py-2 text-[12.5px] text-zinc-700 outline-none focus:border-indigo-400 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-200"
+                          placeholder="Ich bin bis zum ... abwesend und antworte nach meiner Rückkehr."
+                        />
+                      </Field>
+                      <p className="text-[11px] text-zinc-400">
+                        Antwortet automatisch einmal pro Absender im gewählten Zeitraum. Reagiert nicht auf
+                        No-Reply-Adressen oder erkennbare automatische Antworten.
+                      </p>
+                    </div>
+                  )}
+                  <button
+                    type="button"
+                    onClick={handleSaveVacation}
+                    disabled={vacationSaving}
+                    className="mt-2.5 rounded-full bg-zinc-800 px-3.5 py-1.5 text-[12px] font-medium text-white transition hover:bg-zinc-700 disabled:opacity-60 dark:bg-zinc-200 dark:text-zinc-900 dark:hover:bg-zinc-300"
+                  >
+                    {vacationSaving ? 'Speichere…' : 'Abwesenheitsnotiz speichern'}
+                  </button>
+                </div>
+              )}
+
+              <div className="rounded-2xl border border-red-100 bg-red-50/50 p-3.5 dark:border-red-950/60 dark:bg-red-950/20">
+                {confirmDelete ? (
+                  <div className="space-y-2">
+                    <p className="flex items-center gap-1.5 text-[12.5px] font-medium text-red-700 dark:text-red-400">
+                      <AlertTriangle size={13} /> Konto „{account.label}“ wirklich löschen?
+                    </p>
+                    <p className="text-[11.5px] text-red-600/80 dark:text-red-400/70">
+                      Lokal zwischengespeicherte Nachrichten dieses Kontos werden entfernt. Der Server-Posteingang bleibt unberührt.
+                    </p>
+                    <div className="flex gap-2">
+                      <button
+                        type="button"
+                        onClick={handleDelete}
+                        disabled={deleting}
+                        className="rounded-full bg-red-600 px-3.5 py-1.5 text-[12px] font-medium text-white transition hover:bg-red-500 disabled:opacity-60"
+                      >
+                        {deleting ? 'Lösche…' : 'Endgültig löschen'}
+                      </button>
+                      <button
+                        type="button"
+                        onClick={() => setConfirmDelete(false)}
+                        className="rounded-full px-3.5 py-1.5 text-[12px] font-medium text-zinc-500 transition hover:bg-zinc-100 dark:hover:bg-zinc-800"
+                      >
+                        Abbrechen
+                      </button>
+                    </div>
+                  </div>
+                ) : (
+                  <button
+                    type="button"
+                    onClick={() => setConfirmDelete(true)}
+                    className="flex items-center gap-1.5 text-[12.5px] font-medium text-red-600 transition hover:text-red-700 dark:text-red-400"
+                  >
+                    <Trash2 size={13} /> Konto löschen
+                  </button>
+                )}
+              </div>
+            </>
+          )}
+
+          {error && (
+            <p className="rounded-lg bg-red-50 px-3 py-2 text-[12px] text-red-600 dark:bg-red-950/40 dark:text-red-400">
+              {error}
+            </p>
+          )}
+        </div>
+
+        <div className="flex justify-end gap-2 border-t border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <button
+            type="button"
+            onClick={onClose}
+            className="rounded-full px-4 py-2 text-[13px] font-medium text-zinc-500 transition hover:bg-zinc-100 dark:hover:bg-zinc-800"
+          >
+            {isLocal ? 'Schließen' : 'Abbrechen'}
+          </button>
+          {!isLocal && (
+            <button
+              type="submit"
+              disabled={saving}
+              className="rounded-full bg-gradient-to-b from-indigo-500 to-indigo-600 px-5 py-2 text-[13px] font-medium text-white shadow-lg shadow-indigo-600/25 transition hover:from-indigo-400 hover:to-indigo-500 hover:shadow-indigo-600/35 active:scale-[0.98] disabled:opacity-60"
+            >
+              {saving ? 'Speichere…' : 'Speichern'}
+            </button>
+          )}
+        </div>
+      </form>
+    </div>
+  )
+}
diff --git a/src/components/AttachmentPreviewModal.tsx b/src/components/AttachmentPreviewModal.tsx
new file mode 100644
index 0000000..49f1a38
--- /dev/null
+++ b/src/components/AttachmentPreviewModal.tsx
@@ -0,0 +1,63 @@
+import { Download, X } from 'lucide-react'
+import type { AttachmentMeta } from '../types'
+import { formatBytes } from '../lib/format'
+
+export function isPreviewable(att: AttachmentMeta) {
+  const mime = att.mime_type.toLowerCase()
+  return mime.startsWith('image/') || mime === 'application/pdf'
+}
+
+export function AttachmentPreviewModal({
+  attachment,
+  onClose,
+  onDownload,
+}: {
+  attachment: AttachmentMeta | null
+  onClose: () => void
+  onDownload: (att: AttachmentMeta) => void
+}) {
+  if (!attachment) return null
+  const dataUrl = `data:${attachment.mime_type || 'application/octet-stream'};base64,${attachment.content_base64}`
+  const isImage = attachment.mime_type.toLowerCase().startsWith('image/')
+  const isPdf = attachment.mime_type.toLowerCase() === 'application/pdf'
+
+  return (
+    <div
+      className="animate-overlay-in fixed inset-0 z-50 flex items-center justify-center bg-zinc-900/60 p-6 backdrop-blur-sm"
+      onClick={onClose}
+    >
+      <div
+        onClick={(e) => e.stopPropagation()}
+        className="animate-panel-in flex h-[85vh] w-full max-w-3xl flex-col overflow-hidden rounded-[24px] border border-white/10 bg-zinc-900/95 shadow-2xl"
+      >
+        <div className="flex items-center justify-between border-b border-zinc-800 px-5 py-3">
+          <div className="min-w-0">
+            <p className="truncate text-[13px] font-medium text-zinc-100">{attachment.filename}</p>
+            <p className="text-[11px] text-zinc-400">{formatBytes(attachment.size)}</p>
+          </div>
+          <div className="flex shrink-0 items-center gap-1">
+            <button
+              onClick={() => onDownload(attachment)}
+              title="Herunterladen"
+              className="rounded-full p-2 text-zinc-400 transition hover:bg-zinc-800 hover:text-zinc-100"
+            >
+              <Download size={16} />
+            </button>
+            <button
+              onClick={onClose}
+              title="Schließen"
+              className="rounded-full p-2 text-zinc-400 transition hover:bg-zinc-800 hover:text-zinc-100"
+            >
+              <X size={16} />
+            </button>
+          </div>
+        </div>
+        <div className="flex flex-1 items-center justify-center overflow-auto bg-zinc-950/60 p-4">
+          {isImage && <img src={dataUrl} alt={attachment.filename} className="max-h-full max-w-full object-contain" />}
+          {isPdf && <iframe title={attachment.filename} src={dataUrl} className="h-full w-full rounded-lg bg-white" />}
+          {!isImage && !isPdf && <p className="text-sm text-zinc-400">Keine Vorschau verfügbar.</p>}
+        </div>
+      </div>
+    </div>
+  )
+}
diff --git a/src/components/Avatar.tsx b/src/components/Avatar.tsx
new file mode 100644
index 0000000..cf87ec1
--- /dev/null
+++ b/src/components/Avatar.tsx
@@ -0,0 +1,17 @@
+import { avatarColor, initials } from '../lib/format'
+
+export function Avatar({ name, size = 36 }: { name: string; size?: number }) {
+  return (
+    <div
+      className="flex shrink-0 items-center justify-center rounded-full font-medium text-white select-none"
+      style={{
+        width: size,
+        height: size,
+        fontSize: size * 0.38,
+        backgroundColor: avatarColor(name || '?'),
+      }}
+    >
+      {initials(name)}
+    </div>
+  )
+}
diff --git a/src/components/BlockedSendersModal.tsx b/src/components/BlockedSendersModal.tsx
new file mode 100644
index 0000000..65bac6b
--- /dev/null
+++ b/src/components/BlockedSendersModal.tsx
@@ -0,0 +1,149 @@
+import { useEffect, useState } from 'react'
+import { Plus, ShieldOff, Trash2, X } from 'lucide-react'
+import { api } from '../lib/api'
+import type { NewRule, Rule } from '../types'
+
+const inputClass =
+  'flex-1 rounded-lg border border-zinc-200 bg-white px-3 py-1.5 text-[13px] text-zinc-800 outline-none transition focus:border-indigo-400 focus:ring-2 focus:ring-indigo-100 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-100 dark:focus:ring-indigo-500/20'
+
+/// A "blocked sender" is just a global (all-accounts) rule of the shape
+/// {field: from, action: delete}, so this reuses the existing rules engine
+/// (already applied automatically on every sync) instead of a parallel mechanism.
+function isBlockRule(r: Rule): boolean {
+  return (
+    !r.account_id &&
+    r.action === 'delete' &&
+    r.conditions.length === 1 &&
+    r.conditions[0].field === 'from' &&
+    r.conditions[0].contains.trim() !== ''
+  )
+}
+
+export function BlockedSendersModal({
+  open,
+  onClose,
+  onToast,
+}: {
+  open: boolean
+  onClose: () => void
+  onToast: (msg: string) => void
+}) {
+  const [rules, setRules] = useState<Rule[]>([])
+  const [loading, setLoading] = useState(false)
+  const [email, setEmail] = useState('')
+  const [saving, setSaving] = useState(false)
+
+  function refresh() {
+    setLoading(true)
+    api
+      .listRules()
+      .then((all) => setRules(all.filter(isBlockRule)))
+      .catch((e) => onToast(`Liste konnte nicht geladen werden: ${e}`))
+      .finally(() => setLoading(false))
+  }
+
+  useEffect(() => {
+    if (open) refresh()
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [open])
+
+  if (!open) return null
+
+  async function handleAdd(e: React.FormEvent) {
+    e.preventDefault()
+    const value = email.trim()
+    if (!value) return
+    setSaving(true)
+    try {
+      const newRule: NewRule = {
+        account_id: null,
+        conditions: [{ field: 'from', contains: value }],
+        match_type: 'all',
+        action: 'delete',
+      }
+      await api.createRule(newRule)
+      setEmail('')
+      refresh()
+      onToast(`„${value}“ wird jetzt blockiert`)
+    } catch (err) {
+      onToast(`Fehlgeschlagen: ${err}`)
+    } finally {
+      setSaving(false)
+    }
+  }
+
+  async function handleRemove(r: Rule) {
+    setRules((prev) => prev.filter((x) => x.id !== r.id))
+    try {
+      await api.deleteRule(r.id)
+    } catch (err) {
+      onToast(String(err))
+    }
+  }
+
+  return (
+    <div className="animate-overlay-in fixed inset-0 z-50 flex items-center justify-center bg-zinc-900/40 p-6 backdrop-blur-sm dark:bg-black/60">
+      <div className="animate-panel-in flex max-h-[80vh] w-full max-w-md flex-col overflow-hidden rounded-[28px] border border-white/70 bg-white/95 shadow-[0_24px_70px_-12px_rgba(15,15,25,0.35)] ring-1 ring-black/[0.03] backdrop-blur-2xl dark:border-white/10 dark:bg-zinc-900/90 dark:shadow-[0_24px_70px_-12px_rgba(0,0,0,0.6)]">
+        <div className="flex items-center justify-between border-b border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <h2 className="flex items-center gap-2 text-[15px] font-semibold tracking-tight text-zinc-800 dark:text-zinc-100">
+            <ShieldOff size={16} className="text-zinc-400" /> Blockierte Absender
+          </h2>
+          <button
+            onClick={onClose}
+            className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+          >
+            <X size={16} />
+          </button>
+        </div>
+
+        <div className="flex-1 space-y-4 overflow-y-auto px-6 py-5">
+          <form onSubmit={handleAdd} className="flex gap-2">
+            <input
+              className={inputClass}
+              value={email}
+              onChange={(e) => setEmail(e.target.value)}
+              placeholder="Adresse oder Domain, z. B. spam@x.com"
+            />
+            <button
+              type="submit"
+              disabled={saving || !email.trim()}
+              className="flex shrink-0 items-center gap-1.5 rounded-full bg-gradient-to-b from-indigo-500 to-indigo-600 px-4 py-2 text-[12.5px] font-medium text-white shadow-lg shadow-indigo-600/25 transition hover:from-indigo-400 hover:to-indigo-500 disabled:opacity-60"
+            >
+              <Plus size={14} /> Blockieren
+            </button>
+          </form>
+          <p className="text-[11.5px] text-zinc-400">
+            Mails von blockierten Absendern werden bei allen Konten automatisch beim Abrufen gelöscht.
+          </p>
+
+          <div>
+            {loading ? (
+              <p className="text-xs text-zinc-400">Lade…</p>
+            ) : rules.length === 0 ? (
+              <p className="text-xs text-zinc-400">Noch niemand blockiert.</p>
+            ) : (
+              <div className="space-y-1.5">
+                {rules.map((r) => (
+                  <div
+                    key={r.id}
+                    className="flex items-center gap-2.5 rounded-xl border border-zinc-200/80 px-3 py-2 dark:border-zinc-800"
+                  >
+                    <span className="min-w-0 flex-1 truncate text-[12.5px] text-zinc-700 dark:text-zinc-300">
+                      {r.conditions[0].contains}
+                    </span>
+                    <button
+                      onClick={() => handleRemove(r)}
+                      className="shrink-0 rounded-full p-1 text-zinc-400 transition hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-950/40"
+                    >
+                      <Trash2 size={13} />
+                    </button>
+                  </div>
+                ))}
+              </div>
+            )}
+          </div>
+        </div>
+      </div>
+    </div>
+  )
+}
diff --git a/src/components/CaldavModal.tsx b/src/components/CaldavModal.tsx
new file mode 100644
index 0000000..bbae802
--- /dev/null
+++ b/src/components/CaldavModal.tsx
@@ -0,0 +1,219 @@
+import { useEffect, useState } from 'react'
+import { Globe, Plus, RefreshCw, Trash2, X } from 'lucide-react'
+import clsx from 'clsx'
+import { api } from '../lib/api'
+import type { CaldavAccount, NewCaldavAccount } from '../types'
+
+const inputClass =
+  'w-full rounded-lg border border-zinc-200 bg-white px-3 py-1.5 text-[13px] text-zinc-800 outline-none transition focus:border-indigo-400 focus:ring-2 focus:ring-indigo-100 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-100 dark:focus:ring-indigo-500/20'
+
+function Field({ label, children }: { label: string; children: React.ReactNode }) {
+  return (
+    <label className="flex flex-col gap-1">
+      <span className="text-[11.5px] font-medium text-zinc-500 dark:text-zinc-400">{label}</span>
+      {children}
+    </label>
+  )
+}
+
+export function CaldavModal({
+  open,
+  onClose,
+  onToast,
+  onSynced,
+}: {
+  open: boolean
+  onClose: () => void
+  onToast: (msg: string) => void
+  onSynced: () => void
+}) {
+  const [accounts, setAccounts] = useState<CaldavAccount[]>([])
+  const [loading, setLoading] = useState(false)
+  const [syncing, setSyncing] = useState<string | null>(null)
+  const [showForm, setShowForm] = useState(false)
+  const [label, setLabel] = useState('')
+  const [url, setUrl] = useState('')
+  const [username, setUsername] = useState('')
+  const [password, setPassword] = useState('')
+  const [saving, setSaving] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+
+  function refresh() {
+    setLoading(true)
+    api
+      .listCaldavAccounts()
+      .then(setAccounts)
+      .catch((e) => onToast(`Kalender konnten nicht geladen werden: ${e}`))
+      .finally(() => setLoading(false))
+  }
+
+  useEffect(() => {
+    if (open) {
+      refresh()
+      setShowForm(false)
+      setLabel('')
+      setUrl('')
+      setUsername('')
+      setPassword('')
+      setError(null)
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [open])
+
+  if (!open) return null
+
+  async function handleAdd(e: React.FormEvent) {
+    e.preventDefault()
+    setError(null)
+    setSaving(true)
+    try {
+      const newAccount: NewCaldavAccount = { label: label.trim() || url.trim(), url: url.trim(), username: username.trim(), password }
+      const created = await api.addCaldavAccount(newAccount)
+      setShowForm(false)
+      refresh()
+      onToast('Kalender verbunden — synchronisiere…')
+      await handleSync(created.id)
+    } catch (err) {
+      setError(String(err))
+    } finally {
+      setSaving(false)
+    }
+  }
+
+  async function handleSync(id: string) {
+    setSyncing(id)
+    try {
+      const count = await api.syncCaldavCalendar(id)
+      onToast(`${count} Termine synchronisiert`)
+      onSynced()
+    } catch (e) {
+      onToast(`Synchronisierung fehlgeschlagen: ${e}`)
+    } finally {
+      setSyncing(null)
+    }
+  }
+
+  async function handleDelete(a: CaldavAccount) {
+    if (!window.confirm(`Kalender „${a.label}“ trennen? Lokal zwischengespeicherte Termine werden entfernt.`)) return
+    setAccounts((prev) => prev.filter((x) => x.id !== a.id))
+    try {
+      await api.deleteCaldavAccount(a.id)
+      onSynced()
+    } catch (e) {
+      onToast(String(e))
+    }
+  }
+
+  return (
+    <div className="animate-overlay-in fixed inset-0 z-50 flex items-center justify-center bg-zinc-900/40 p-6 backdrop-blur-sm dark:bg-black/60">
+      <div className="animate-panel-in flex max-h-[85vh] w-full max-w-md flex-col overflow-hidden rounded-[28px] border border-white/70 bg-white/95 shadow-[0_24px_70px_-12px_rgba(15,15,25,0.35)] ring-1 ring-black/[0.03] backdrop-blur-2xl dark:border-white/10 dark:bg-zinc-900/90 dark:shadow-[0_24px_70px_-12px_rgba(0,0,0,0.6)]">
+        <div className="flex items-center justify-between border-b border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <h2 className="flex items-center gap-2 text-[15px] font-semibold tracking-tight text-zinc-800 dark:text-zinc-100">
+            <Globe size={16} className="text-zinc-400" /> CalDAV-Kalender
+          </h2>
+          <button
+            onClick={onClose}
+            className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+          >
+            <X size={16} />
+          </button>
+        </div>
+
+        <div className="flex-1 space-y-4 overflow-y-auto px-6 py-5">
+          <p className="text-[11.5px] text-zinc-400">
+            Für Nextcloud, iCloud, Radicale & Co. — trag die direkte Kalender-Adresse ein (kein automatisches Erkennen
+            der Kalenderliste). Bei iCloud/Nextcloud brauchst du meist ein App-Passwort statt deines normalen Passworts.
+          </p>
+
+          {showForm ? (
+            <form onSubmit={handleAdd} className="space-y-2.5 rounded-2xl border border-zinc-200/80 bg-zinc-50/60 p-3.5 dark:border-zinc-800 dark:bg-zinc-950/40">
+              <Field label="Name">
+                <input className={inputClass} value={label} onChange={(e) => setLabel(e.target.value)} placeholder="z. B. Privat" />
+              </Field>
+              <Field label="Kalender-URL">
+                <input
+                  className={inputClass}
+                  value={url}
+                  onChange={(e) => setUrl(e.target.value)}
+                  placeholder="https://cloud.example.com/remote.php/dav/calendars/user/personal/"
+                  required
+                />
+              </Field>
+              <Field label="Benutzername">
+                <input className={inputClass} value={username} onChange={(e) => setUsername(e.target.value)} required />
+              </Field>
+              <Field label="Passwort / App-Passwort">
+                <input className={inputClass} type="password" value={password} onChange={(e) => setPassword(e.target.value)} required />
+              </Field>
+              {error && (
+                <p className="rounded-lg bg-red-50 px-3 py-2 text-[11.5px] text-red-600 dark:bg-red-950/40 dark:text-red-400">
+                  {error}
+                </p>
+              )}
+              <div className="flex gap-2">
+                <button
+                  type="submit"
+                  disabled={saving || !url.trim() || !username.trim() || !password}
+                  className="rounded-full bg-gradient-to-b from-indigo-500 to-indigo-600 px-4 py-1.5 text-[12.5px] font-medium text-white shadow-lg shadow-indigo-600/25 transition hover:from-indigo-400 hover:to-indigo-500 disabled:opacity-60"
+                >
+                  {saving ? 'Verbinde…' : 'Verbinden'}
+                </button>
+                <button
+                  type="button"
+                  onClick={() => setShowForm(false)}
+                  className="rounded-full px-4 py-1.5 text-[12.5px] font-medium text-zinc-500 transition hover:bg-zinc-100 dark:hover:bg-zinc-800"
+                >
+                  Abbrechen
+                </button>
+              </div>
+            </form>
+          ) : (
+            <button
+              type="button"
+              onClick={() => setShowForm(true)}
+              className="flex w-full items-center justify-center gap-1.5 rounded-2xl border border-dashed border-zinc-300 py-2.5 text-[12.5px] font-medium text-zinc-500 transition hover:border-indigo-300 hover:text-indigo-600 dark:border-zinc-700 dark:text-zinc-400 dark:hover:border-indigo-800"
+            >
+              <Plus size={14} /> Kalender verbinden
+            </button>
+          )}
+
+          <div>
+            {loading ? (
+              <p className="text-xs text-zinc-400">Lade…</p>
+            ) : accounts.length === 0 ? (
+              <p className="text-xs text-zinc-400">Noch kein CalDAV-Kalender verbunden.</p>
+            ) : (
+              <div className="space-y-1.5">
+                {accounts.map((a) => (
+                  <div
+                    key={a.id}
+                    className="flex items-center gap-2.5 rounded-xl border border-zinc-200/80 px-3 py-2 dark:border-zinc-800"
+                  >
+                    <div className="min-w-0 flex-1">
+                      <p className="truncate text-[12.5px] font-medium text-zinc-700 dark:text-zinc-300">{a.label}</p>
+                      <p className="truncate text-[11px] text-zinc-400">{a.url}</p>
+                    </div>
+                    <button
+                      onClick={() => handleSync(a.id)}
+                      disabled={syncing === a.id}
+                      title="Jetzt synchronisieren"
+                      className="shrink-0 rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 disabled:opacity-40 dark:hover:bg-zinc-800 dark:hover:text-zinc-300"
+                    >
+                      <RefreshCw size={13} className={clsx(syncing === a.id && 'animate-spin')} />
+                    </button>
+                    <button
+                      onClick={() => handleDelete(a)}
+                      className="shrink-0 rounded-full p-1.5 text-zinc-400 transition hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-950/40"
+                    >
+                      <Trash2 size={13} />
+                    </button>
+                  </div>
+                ))}
+              </div>
+            )}
+          </div>
+        </div>
+      </div>
+    </div>
+  )
+}
diff --git a/src/components/CalendarDayView.tsx b/src/components/CalendarDayView.tsx
new file mode 100644
index 0000000..b8dc29f
--- /dev/null
+++ b/src/components/CalendarDayView.tsx
@@ -0,0 +1,126 @@
+import { useMemo } from 'react'
+import type { Event } from '../types'
+import { categoryHex } from '../lib/categories'
+
+const HOUR_HEIGHT = 52
+
+function startOfDay(d: Date) {
+  return new Date(d.getFullYear(), d.getMonth(), d.getDate())
+}
+
+function minutesSinceMidnight(ts: number, day: Date) {
+  const dayStart = Math.floor(startOfDay(day).getTime() / 1000)
+  return Math.max(0, Math.min(24 * 60, Math.round((ts - dayStart) / 60)))
+}
+
+export function CalendarDayView({
+  date,
+  events,
+  onEventClick,
+  onEventContextMenu,
+  onEmptyClick,
+}: {
+  date: Date
+  events: Event[]
+  onEventClick: (event: Event) => void
+  onEventContextMenu?: (e: React.MouseEvent, event: Event) => void
+  onEmptyClick: () => void
+}) {
+  const dayStart = Math.floor(startOfDay(date).getTime() / 1000)
+  const dayEnd = dayStart + 86400
+
+  const { allDay, timed } = useMemo(() => {
+    const inDay = events.filter((e) => e.start_ts < dayEnd && e.end_ts > dayStart)
+    return {
+      allDay: inDay.filter((e) => e.all_day),
+      timed: inDay.filter((e) => !e.all_day).sort((a, b) => a.start_ts - b.start_ts),
+    }
+  }, [events, dayStart, dayEnd])
+
+  const now = new Date()
+  const showNowLine = startOfDay(now).getTime() === startOfDay(date).getTime()
+  const nowTop = (minutesSinceMidnight(Math.floor(now.getTime() / 1000), date) / 60) * HOUR_HEIGHT
+
+  return (
+    <div className="flex flex-1 flex-col overflow-hidden">
+      {allDay.length > 0 && (
+        <div className="flex flex-wrap gap-1.5 border-b border-zinc-200/80 px-4 py-2 dark:border-zinc-800/80">
+          {allDay.map((e) => {
+            const hex = categoryHex(e.category)
+            return (
+              <span
+                key={e.id}
+                onClick={() => onEventClick(e)}
+                onContextMenu={(ev) => onEventContextMenu?.(ev, e)}
+                className="cursor-default truncate rounded-md px-2 py-0.5 text-[11.5px] font-medium bg-indigo-50 text-indigo-700 hover:bg-indigo-100 dark:bg-indigo-500/15 dark:text-indigo-300 dark:hover:bg-indigo-500/25"
+                style={hex ? { backgroundColor: `${hex}26`, color: hex } : undefined}
+              >
+                {e.title}
+              </span>
+            )
+          })}
+        </div>
+      )}
+      <div className="relative flex-1 overflow-y-auto">
+        <div className="relative" style={{ height: HOUR_HEIGHT * 24 }}>
+          {Array.from({ length: 24 }, (_, h) => (
+            <div
+              key={h}
+              onClick={onEmptyClick}
+              className="absolute inset-x-0 flex cursor-default items-start gap-2 border-t border-zinc-100 hover:bg-zinc-50/60 dark:border-zinc-900 dark:hover:bg-zinc-900/40"
+              style={{ top: h * HOUR_HEIGHT, height: HOUR_HEIGHT }}
+            >
+              <span className="w-12 shrink-0 -translate-y-2 pl-2 text-right text-[10.5px] text-zinc-400 select-none">
+                {h.toString().padStart(2, '0')}:00
+              </span>
+            </div>
+          ))}
+          {showNowLine && (
+            <div className="pointer-events-none absolute inset-x-0 z-10 flex items-center" style={{ top: nowTop }}>
+              <span className="ml-12 h-1.5 w-1.5 shrink-0 rounded-full bg-red-500" />
+              <span className="h-px flex-1 bg-red-500" />
+            </div>
+          )}
+          <div className="pointer-events-none absolute inset-y-0 left-14 right-2">
+            {timed.map((e) => {
+              const top = (minutesSinceMidnight(e.start_ts, date) / 60) * HOUR_HEIGHT
+              const bottom = (minutesSinceMidnight(e.end_ts, date) / 60) * HOUR_HEIGHT
+              const height = Math.max(20, bottom - top)
+              const hex = categoryHex(e.category)
+              return (
+                <div
+                  key={e.id}
+                  onClick={(ev) => {
+                    ev.stopPropagation()
+                    onEventClick(e)
+                  }}
+                  onContextMenu={(ev) => {
+                    ev.stopPropagation()
+                    onEventContextMenu?.(ev, e)
+                  }}
+                  className="pointer-events-auto absolute left-0 right-0 cursor-default overflow-hidden rounded-lg border-l-2 px-2 py-1 text-[11.5px] font-medium bg-indigo-50 text-indigo-700 hover:bg-indigo-100 dark:bg-indigo-500/15 dark:text-indigo-300 dark:hover:bg-indigo-500/25"
+                  style={{
+                    top,
+                    height,
+                    borderLeftColor: hex ?? '#6366f1',
+                    backgroundColor: hex ? `${hex}1a` : undefined,
+                    color: hex ?? undefined,
+                  }}
+                >
+                  <p className="truncate">{e.title}</p>
+                  {height > 32 && (
+                    <p className="truncate text-[10.5px] opacity-70">
+                      {new Date(e.start_ts * 1000).toLocaleTimeString('de-DE', { hour: '2-digit', minute: '2-digit' })}
+                      {' – '}
+                      {new Date(e.end_ts * 1000).toLocaleTimeString('de-DE', { hour: '2-digit', minute: '2-digit' })}
+                    </p>
+                  )}
+                </div>
+              )
+            })}
+          </div>
+        </div>
+      </div>
+    </div>
+  )
+}
diff --git a/src/components/CalendarView.tsx b/src/components/CalendarView.tsx
new file mode 100644
index 0000000..88ad588
--- /dev/null
+++ b/src/components/CalendarView.tsx
@@ -0,0 +1,231 @@
+import { useState, useMemo } from 'react'
+import { ChevronLeft, ChevronRight } from 'lucide-react'
+import clsx from 'clsx'
+import type { Event } from '../types'
+import { categoryHex } from '../lib/categories'
+import { CalendarDayView } from './CalendarDayView'
+
+const WEEKDAY_NAMES = [
+  'Sonntag', 'Montag', 'Dienstag', 'Mittwoch', 'Donnerstag', 'Freitag', 'Samstag',
+]
+const WEEKDAYS = ['Mo', 'Di', 'Mi', 'Do', 'Fr', 'Sa', 'So']
+const MONTH_NAMES = [
+  'Januar', 'Februar', 'März', 'April', 'Mai', 'Juni',
+  'Juli', 'August', 'September', 'Oktober', 'November', 'Dezember',
+]
+
+function startOfDay(d: Date) {
+  return new Date(d.getFullYear(), d.getMonth(), d.getDate())
+}
+
+function isSameDay(a: Date, b: Date) {
+  return a.getFullYear() === b.getFullYear() && a.getMonth() === b.getMonth() && a.getDate() === b.getDate()
+}
+
+function buildGrid(monthDate: Date): Date[] {
+  const first = new Date(monthDate.getFullYear(), monthDate.getMonth(), 1)
+  const mondayOffset = (first.getDay() + 6) % 7
+  const gridStart = new Date(first)
+  gridStart.setDate(first.getDate() - mondayOffset)
+  return Array.from({ length: 42 }, (_, i) => {
+    const d = new Date(gridStart)
+    d.setDate(gridStart.getDate() + i)
+    return d
+  })
+}
+
+export function CalendarView({
+  monthDate,
+  events,
+  loading,
+  onPrevMonth,
+  onNextMonth,
+  onToday,
+  onDayClick,
+  onEventClick,
+  onEventContextMenu,
+}: {
+  monthDate: Date
+  events: Event[]
+  loading: boolean
+  onPrevMonth: () => void
+  onNextMonth: () => void
+  onToday: () => void
+  onDayClick: (date: Date) => void
+  onEventClick: (event: Event) => void
+  onEventContextMenu?: (e: React.MouseEvent, event: Event) => void
+}) {
+  const grid = useMemo(() => buildGrid(monthDate), [monthDate])
+  const today = useMemo(() => new Date(), [])
+  const [mode, setMode] = useState<'month' | 'day'>('month')
+  const [dayDate, setDayDate] = useState(() => new Date())
+
+  function openDay(date: Date) {
+    setDayDate(date)
+    setMode('day')
+  }
+
+  const eventsByDay = useMemo(() => {
+    const map = new Map<string, Event[]>()
+    for (const day of grid) {
+      const dayStart = Math.floor(startOfDay(day).getTime() / 1000)
+      const dayEnd = dayStart + 86400
+      const items = events
+        .filter((e) => e.start_ts < dayEnd && e.end_ts > dayStart)
+        .sort((a, b) => a.start_ts - b.start_ts)
+      map.set(day.toDateString(), items)
+    }
+    return map
+  }, [grid, events])
+
+  return (
+    <div className="flex min-w-0 flex-1 flex-col overflow-hidden">
+      <div className="flex items-center gap-3 border-b border-zinc-200/80 px-6 py-3.5 dark:border-zinc-800/80">
+        <h2 className="text-[15px] font-semibold tracking-tight text-zinc-800 dark:text-zinc-100">
+          {mode === 'month'
+            ? `${MONTH_NAMES[monthDate.getMonth()]} ${monthDate.getFullYear()}`
+            : `${WEEKDAY_NAMES[dayDate.getDay()]}, ${dayDate.getDate()}. ${MONTH_NAMES[dayDate.getMonth()]} ${dayDate.getFullYear()}`}
+        </h2>
+        <div className="flex rounded-lg bg-zinc-100 p-0.5 text-[11.5px] dark:bg-zinc-800">
+          <button
+            onClick={() => setMode('month')}
+            className={clsx(
+              'rounded-md px-2.5 py-1 font-medium transition',
+              mode === 'month' ? 'bg-white text-zinc-800 shadow-sm dark:bg-zinc-700 dark:text-zinc-100' : 'text-zinc-500',
+            )}
+          >
+            Monat
+          </button>
+          <button
+            onClick={() => setMode('day')}
+            className={clsx(
+              'rounded-md px-2.5 py-1 font-medium transition',
+              mode === 'day' ? 'bg-white text-zinc-800 shadow-sm dark:bg-zinc-700 dark:text-zinc-100' : 'text-zinc-500',
+            )}
+          >
+            Tag
+          </button>
+        </div>
+        <div className="ml-auto flex items-center gap-1">
+          <button
+            onClick={() => {
+              if (mode === 'day') setDayDate(new Date())
+              else onToday()
+            }}
+            className="rounded-full px-3 py-1 text-[12px] font-medium text-zinc-500 transition hover:bg-zinc-100 dark:hover:bg-zinc-800"
+          >
+            Heute
+          </button>
+          <button
+            onClick={() => {
+              if (mode === 'day') setDayDate((d) => new Date(d.getFullYear(), d.getMonth(), d.getDate() - 1))
+              else onPrevMonth()
+            }}
+            className="rounded-full p-1.5 text-zinc-500 transition hover:bg-zinc-100 dark:hover:bg-zinc-800"
+          >
+            <ChevronLeft size={16} />
+          </button>
+          <button
+            onClick={() => {
+              if (mode === 'day') setDayDate((d) => new Date(d.getFullYear(), d.getMonth(), d.getDate() + 1))
+              else onNextMonth()
+            }}
+            className="rounded-full p-1.5 text-zinc-500 transition hover:bg-zinc-100 dark:hover:bg-zinc-800"
+          >
+            <ChevronRight size={16} />
+          </button>
+        </div>
+      </div>
+
+      {mode === 'day' ? (
+        <CalendarDayView
+          date={dayDate}
+          events={events}
+          onEventClick={onEventClick}
+          onEventContextMenu={onEventContextMenu}
+          onEmptyClick={() => onDayClick(dayDate)}
+        />
+      ) : (
+        <>
+      <div className="grid grid-cols-7 border-b border-zinc-200/80 dark:border-zinc-800/80">
+        {WEEKDAYS.map((w) => (
+          <div key={w} className="px-2 py-1.5 text-center text-[11px] font-semibold tracking-wide text-zinc-400 uppercase">
+            {w}
+          </div>
+        ))}
+      </div>
+
+      <div className="grid flex-1 grid-cols-7 grid-rows-6 overflow-y-auto">
+        {grid.map((day) => {
+          const inMonth = day.getMonth() === monthDate.getMonth()
+          const isToday = isSameDay(day, today)
+          const dayEvents = eventsByDay.get(day.toDateString()) ?? []
+          return (
+            <button
+              key={day.toISOString()}
+              onClick={() => onDayClick(day)}
+              className={clsx(
+                'flex flex-col items-stretch gap-1 border-b border-r border-zinc-100 p-1.5 text-left transition hover:bg-zinc-50 dark:border-zinc-900 dark:hover:bg-zinc-900/60',
+                !inMonth && 'bg-zinc-50/50 dark:bg-zinc-950/40',
+              )}
+            >
+              <span
+                onClick={(ev) => {
+                  ev.stopPropagation()
+                  openDay(day)
+                }}
+                title="Tagesansicht öffnen"
+                className={clsx(
+                  'flex h-5 w-5 shrink-0 items-center justify-center rounded-full text-[11.5px] font-medium transition hover:ring-2 hover:ring-indigo-300',
+                  isToday
+                    ? 'bg-indigo-600 text-white'
+                    : inMonth
+                      ? 'text-zinc-700 dark:text-zinc-300'
+                      : 'text-zinc-350 dark:text-zinc-700',
+                )}
+              >
+                {day.getDate()}
+              </span>
+              <div className="flex flex-1 flex-col gap-0.5 overflow-hidden">
+                {dayEvents.slice(0, 3).map((e) => {
+                  const hex = categoryHex(e.category)
+                  return (
+                    <span
+                      key={e.id}
+                      onClick={(ev) => {
+                        ev.stopPropagation()
+                        onEventClick(e)
+                      }}
+                      onContextMenu={(ev) => {
+                        ev.stopPropagation()
+                        onEventContextMenu?.(ev, e)
+                      }}
+                      className={clsx(
+                        'truncate rounded-md px-1.5 py-0.5 text-[10.5px] font-medium',
+                        !hex && 'bg-indigo-50 text-indigo-700 hover:bg-indigo-100 dark:bg-indigo-500/15 dark:text-indigo-300 dark:hover:bg-indigo-500/25',
+                      )}
+                      style={hex ? { backgroundColor: `${hex}26`, color: hex } : undefined}
+                    >
+                      {e.all_day ? '' : `${new Date(e.start_ts * 1000).getHours().toString().padStart(2, '0')}:${new Date(e.start_ts * 1000).getMinutes().toString().padStart(2, '0')} `}
+                      {e.title}
+                    </span>
+                  )
+                })}
+                {dayEvents.length > 3 && (
+                  <span className="px-1.5 text-[10px] text-zinc-400">+{dayEvents.length - 3} weitere</span>
+                )}
+              </div>
+            </button>
+          )
+        })}
+      </div>
+      </>
+      )}
+      {loading && (
+        <div className="border-t border-zinc-200/80 px-6 py-1.5 text-[11px] text-zinc-400 dark:border-zinc-800/80">
+          Lade Termine…
+        </div>
+      )}
+    </div>
+  )
+}
diff --git a/src/components/ClassicRibbonUI.tsx b/src/components/ClassicRibbonUI.tsx
new file mode 100644
index 0000000..bc15655
--- /dev/null
+++ b/src/components/ClassicRibbonUI.tsx
@@ -0,0 +1,170 @@
+import clsx from 'clsx'
+import { Popover } from './Popover'
+
+export function ClassicTabBar({
+  tabs,
+  active,
+  onChange,
+  rightSlot,
+}: {
+  tabs: { id: string; label: string }[]
+  active: string
+  onChange: (id: string) => void
+  rightSlot?: React.ReactNode
+}) {
+  return (
+    <div className="flex items-center gap-0.5 bg-[#1e5aa8] px-2 pt-1.5 dark:bg-zinc-900">
+      {tabs.map((t) => (
+        <button
+          key={t.id}
+          onClick={() => onChange(t.id)}
+          className={clsx(
+            'rounded-t-sm px-3 py-1.5 text-[13px] transition',
+            active === t.id
+              ? 'bg-[#f3f2f1] font-semibold text-[#1e5aa8] dark:bg-zinc-800 dark:text-blue-300'
+              : 'text-white/90 hover:bg-white/10',
+          )}
+        >
+          {t.label}
+        </button>
+      ))}
+      {rightSlot && <div className="ml-auto flex items-center pb-1.5">{rightSlot}</div>}
+    </div>
+  )
+}
+
+export function ClassicRibbonGroup({
+  caption,
+  children,
+  onLauncher,
+}: {
+  caption: string
+  children: React.ReactNode
+  onLauncher?: () => void
+}) {
+  return (
+    <div className="flex h-[92px] shrink-0 flex-col justify-between border-r border-[#d1d1d1] px-1.5 last:border-r-0 dark:border-zinc-700">
+      <div className="flex flex-1 items-start gap-0.5 pt-1">{children}</div>
+      <div className="relative flex items-center justify-center pb-0.5">
+        <span className="text-[10.5px] text-[#605e5c] dark:text-zinc-400">{caption}</span>
+        {onLauncher && (
+          <button
+            onClick={onLauncher}
+            title={`${caption}: weitere Optionen`}
+            className="absolute right-0 text-[#605e5c] hover:text-[#1e5aa8] dark:text-zinc-400 dark:hover:text-blue-300"
+          >
+            <svg width="8" height="8" viewBox="0 0 9 9">
+              <path d="M0 9L9 0M9 0H3M9 0V6" stroke="currentColor" strokeWidth="1.2" fill="none" />
+            </svg>
+          </button>
+        )}
+      </div>
+    </div>
+  )
+}
+
+export function ClassicButton({
+  icon: Icon,
+  label,
+  onClick,
+  disabled,
+  active,
+  size = 'large',
+  title,
+}: {
+  icon: React.ComponentType<{ size?: number }>
+  label: string
+  onClick?: () => void
+  disabled?: boolean
+  active?: boolean
+  size?: 'large' | 'small'
+  title?: string
+}) {
+  if (size === 'small') {
+    return (
+      <button
+        onClick={onClick}
+        disabled={disabled}
+        title={title ?? label}
+        className={clsx(
+          'flex items-center gap-1.5 rounded-sm px-1.5 py-0.5 text-[11.5px] text-[#1f1f1f] transition disabled:cursor-not-allowed disabled:opacity-40 dark:text-zinc-200',
+          active ? 'bg-[#cce4f7] dark:bg-blue-500/20' : 'hover:bg-[#e6f2fb] dark:hover:bg-zinc-700/60',
+        )}
+      >
+        <Icon size={14} />
+        <span className="whitespace-nowrap">{label}</span>
+      </button>
+    )
+  }
+  return (
+    <button
+      onClick={onClick}
+      disabled={disabled}
+      title={title ?? label}
+      className={clsx(
+        'flex w-[64px] shrink-0 flex-col items-center gap-1 rounded-sm px-1 py-1 text-center text-[11px] leading-tight text-[#1f1f1f] transition disabled:cursor-not-allowed disabled:opacity-40 dark:text-zinc-200',
+        active ? 'bg-[#cce4f7] dark:bg-blue-500/20' : 'hover:bg-[#e6f2fb] dark:hover:bg-zinc-700/60',
+      )}
+    >
+      <Icon size={24} />
+      <span>{label}</span>
+    </button>
+  )
+}
+
+export function ClassicDropdown({
+  button,
+  children,
+  open,
+  onOpenChange,
+  align = 'left',
+  widthClass = 'w-56',
+}: {
+  button: React.ReactNode
+  children: React.ReactNode
+  open: boolean
+  onOpenChange: (v: boolean) => void
+  align?: 'left' | 'right'
+  widthClass?: string
+}) {
+  return (
+    <Popover
+      open={open}
+      onOpenChange={onOpenChange}
+      trigger={button}
+      align={align === 'right' ? 'end' : 'start'}
+      panelClassName={clsx(
+        'animate-panel-in overflow-hidden rounded-md border border-zinc-300 bg-white py-1 shadow-xl dark:border-zinc-700 dark:bg-zinc-900',
+        widthClass,
+      )}
+    >
+      {children}
+    </Popover>
+  )
+}
+
+export function ClassicMenuItem({
+  children,
+  onClick,
+  disabled,
+}: {
+  children: React.ReactNode
+  onClick?: () => void
+  disabled?: boolean
+}) {
+  return (
+    <button
+      onClick={onClick}
+      disabled={disabled}
+      className="flex w-full items-center gap-2 px-3 py-1.5 text-left text-[12.5px] text-zinc-700 transition hover:bg-[#e6f2fb] disabled:cursor-not-allowed disabled:opacity-40 dark:text-zinc-200 dark:hover:bg-zinc-800"
+    >
+      {children}
+    </button>
+  )
+}
+
+export function ClassicRibbonBody({ children }: { children: React.ReactNode }) {
+  return (
+    <div className="flex h-[100px] items-stretch overflow-x-auto bg-[#f3f2f1] px-1.5 dark:bg-zinc-800/60">{children}</div>
+  )
+}
diff --git a/src/components/ComposePane.tsx b/src/components/ComposePane.tsx
new file mode 100644
index 0000000..baa2817
--- /dev/null
+++ b/src/components/ComposePane.tsx
@@ -0,0 +1,497 @@
+import { useEffect, useRef, useState } from 'react'
+import { Check, Pencil, PenLine, Plus, Send, Trash2, X } from 'lucide-react'
+import clsx from 'clsx'
+import type { Account, ComposeMessage, OutgoingAttachment } from '../types'
+import { formatBytes } from '../lib/format'
+import { escapeHtml, htmlIsEmpty } from '../lib/richtext'
+import { getDefaultSignatureId, listSignatures, loadSignature, saveSignatureList, type Signature } from '../lib/signature'
+import { api } from '../lib/api'
+import { RecipientInput } from './RecipientInput'
+import { RichTextEditor, type RichTextEditorHandle } from './RichTextEditor'
+import { ComposeRibbon } from './ComposeRibbon'
+import { TemplatesModal } from './TemplatesModal'
+
+export interface ComposeInitial {
+  to?: string
+  cc?: string
+  subject?: string
+  body?: string
+  attachments?: OutgoingAttachment[]
+  inReplyTo?: string
+  draftUid?: number
+  skipSignature?: boolean
+}
+
+const AUTOSAVE_DELAY = 1500
+const UNDO_WINDOW_SECS = 8
+
+function fileToAttachment(file: File): Promise<OutgoingAttachment> {
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader()
+    reader.onload = () => {
+      const result = reader.result as string
+      const base64 = result.split(',')[1] ?? ''
+      resolve({ filename: file.name, mime_type: file.type || 'application/octet-stream', content_base64: base64 })
+    }
+    reader.onerror = reject
+    reader.readAsDataURL(file)
+  })
+}
+
+function htmlToPlainText(html: string): string {
+  const tmp = document.createElement('div')
+  tmp.innerHTML = html
+  return tmp.textContent ?? ''
+}
+
+export function ComposePane({
+  account,
+  accounts,
+  onAccountChange,
+  initial,
+  onDiscard,
+  onSend,
+  onDraftSaved,
+  sending,
+}: {
+  account: Account | null
+  accounts: Account[]
+  onAccountChange: (accountId: string) => void
+  initial: ComposeInitial | null
+  onDiscard: () => void
+  onSend: (msg: ComposeMessage, sendAt: number) => Promise<void>
+  onDraftSaved: (uid: number) => void
+  sending: boolean
+}) {
+  const [to, setTo] = useState('')
+  const [cc, setCc] = useState('')
+  const [bcc, setBcc] = useState('')
+  const [showCc, setShowCc] = useState(false)
+  const [showBcc, setShowBcc] = useState(false)
+  const [subject, setSubject] = useState('')
+  const [body, setBody] = useState('')
+  const [attachments, setAttachments] = useState<OutgoingAttachment[]>([])
+  const [error, setError] = useState<string | null>(null)
+  const [info, setInfo] = useState<string | null>(null)
+  const [signatureOpen, setSignatureOpen] = useState(false)
+  const [signatures, setSignatures] = useState<Signature[]>([])
+  const [defaultSigId, setDefaultSigId] = useState<string | null>(null)
+  const [editingSigId, setEditingSigId] = useState<string | null>(null)
+  const [dragActive, setDragActive] = useState(false)
+  const dragCounter = useRef(0)
+  const [templatesOpen, setTemplatesOpen] = useState(false)
+
+  const [importance, setImportance] = useState<'high' | 'low' | null>(null)
+  const [requestReadReceipt, setRequestReadReceipt] = useState(false)
+  const [delayAt, setDelayAt] = useState('')
+  const [replyTo, setReplyTo] = useState('')
+  const [plainTextMode, setPlainTextMode] = useState(false)
+
+  const fileInput = useRef<HTMLInputElement>(null)
+  const editorRef = useRef<RichTextEditorHandle>(null)
+  const draftUidRef = useRef<number | null>(null)
+  const isFirstRender = useRef(true)
+
+  const sendableAccounts = accounts.filter((a) => a.protocol !== 'local')
+
+  useEffect(() => {
+    const signature = account && !initial?.skipSignature ? loadSignature(account.id) : ''
+    const base = initial?.body ?? ''
+    const sigBlock = signature ? `<br><br>--<br>${signature.replace(/\n/g, '<br>')}` : ''
+    const withSignature = base + sigBlock
+
+    setTo(initial?.to ?? '')
+    setCc(initial?.cc ?? '')
+    setBcc('')
+    setShowCc(!!initial?.cc)
+    setShowBcc(false)
+    setSubject(initial?.subject ?? '')
+    setBody(withSignature)
+    setAttachments(initial?.attachments ?? [])
+    setError(null)
+    setImportance(null)
+    setRequestReadReceipt(false)
+    setDelayAt('')
+    setReplyTo('')
+    setPlainTextMode(false)
+    if (account) {
+      setSignatures(listSignatures(account.id))
+      setDefaultSigId(getDefaultSignatureId(account.id))
+    }
+    setEditingSigId(null)
+    draftUidRef.current = initial?.draftUid ?? null
+    isFirstRender.current = true
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [initial])
+
+  useEffect(() => {
+    if (isFirstRender.current) {
+      isFirstRender.current = false
+      return
+    }
+    if (!account) return
+    const hasContent = to.trim() || cc.trim() || bcc.trim() || subject.trim() || !htmlIsEmpty(body)
+    if (!hasContent) return
+    const timeout = setTimeout(() => {
+      api
+        .saveDraft(draftUidRef.current, {
+          account_id: account.id,
+          to: to.trim(),
+          cc: cc.trim() || undefined,
+          bcc: bcc.trim() || undefined,
+          subject: subject.trim(),
+          body_html: body,
+          attachments: [],
+        })
+        .then((uid) => {
+          draftUidRef.current = uid
+          onDraftSaved(uid)
+        })
+        .catch(() => {})
+    }, AUTOSAVE_DELAY)
+    return () => clearTimeout(timeout)
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [to, cc, bcc, subject, body, account])
+
+  async function handleFiles(files: FileList | null) {
+    if (!files || files.length === 0) return
+    const converted = await Promise.all(Array.from(files).map(fileToAttachment))
+    setAttachments((prev) => [...prev, ...converted])
+  }
+
+  function handleDragEnter(e: React.DragEvent) {
+    e.preventDefault()
+    if (!e.dataTransfer.types.includes('Files')) return
+    dragCounter.current += 1
+    setDragActive(true)
+  }
+
+  function handleDragLeave(e: React.DragEvent) {
+    e.preventDefault()
+    dragCounter.current -= 1
+    if (dragCounter.current <= 0) {
+      dragCounter.current = 0
+      setDragActive(false)
+    }
+  }
+
+  function handleDragOver(e: React.DragEvent) {
+    e.preventDefault()
+  }
+
+  function handleDrop(e: React.DragEvent) {
+    e.preventDefault()
+    dragCounter.current = 0
+    setDragActive(false)
+    handleFiles(e.dataTransfer.files)
+  }
+
+  function handleInsertTemplate(t: { subject: string; body: string }) {
+    if (t.subject && !subject.trim()) setSubject(t.subject)
+    editorRef.current?.exec('insertHTML', t.body.replace(/\n/g, '<br>'))
+  }
+
+  function showInfo(msg: string) {
+    setInfo(msg)
+    setTimeout(() => setInfo(null), 3000)
+  }
+
+  function persistSignatures(next: Signature[], nextDefaultId: string | null) {
+    if (!account) return
+    setSignatures(next)
+    setDefaultSigId(nextDefaultId)
+    saveSignatureList(account.id, next, nextDefaultId)
+  }
+
+  function handleAddSignature() {
+    const sig: Signature = { id: crypto.randomUUID(), name: `Signatur ${signatures.length + 1}`, body: '' }
+    const next = [...signatures, sig]
+    persistSignatures(next, defaultSigId ?? sig.id)
+    setEditingSigId(sig.id)
+  }
+
+  function handleRenameSignature(id: string, name: string) {
+    persistSignatures(
+      signatures.map((s) => (s.id === id ? { ...s, name } : s)),
+      defaultSigId,
+    )
+  }
+
+  function handleEditSignatureBody(id: string, sigBody: string) {
+    persistSignatures(
+      signatures.map((s) => (s.id === id ? { ...s, body: sigBody } : s)),
+      defaultSigId,
+    )
+  }
+
+  function handleDeleteSignature(id: string) {
+    const next = signatures.filter((s) => s.id !== id)
+    persistSignatures(next, defaultSigId === id ? null : defaultSigId)
+    if (editingSigId === id) setEditingSigId(null)
+  }
+
+  async function handleSend() {
+    if (!account) return
+    if (!to.trim()) {
+      setError('Bitte gib mindestens einen Empfänger an.')
+      return
+    }
+    setError(null)
+    try {
+      const finalBody = plainTextMode ? `<pre>${escapeHtml(htmlToPlainText(body))}</pre>` : body
+      const sendAt = delayAt ? Math.floor(new Date(delayAt).getTime() / 1000) : Math.floor(Date.now() / 1000) + UNDO_WINDOW_SECS
+      await onSend(
+        {
+          account_id: account.id,
+          to: to.trim(),
+          cc: cc.trim() || undefined,
+          bcc: bcc.trim() || undefined,
+          subject: subject.trim(),
+          body_html: finalBody,
+          attachments,
+          in_reply_to: initial?.inReplyTo,
+          reply_to: replyTo.trim() || undefined,
+          request_read_receipt: requestReadReceipt,
+          importance: importance ?? undefined,
+        },
+        sendAt,
+      )
+    } catch (e) {
+      setError(String(e))
+    }
+  }
+
+  return (
+    <div
+      className="relative flex min-w-0 flex-1 flex-col"
+      onDragEnter={handleDragEnter}
+      onDragOver={handleDragOver}
+      onDragLeave={handleDragLeave}
+      onDrop={handleDrop}
+    >
+      {dragActive && (
+        <div className="pointer-events-none absolute inset-0 z-30 flex items-center justify-center gap-2 border-2 border-dashed border-indigo-400 bg-indigo-50/90 text-[13px] font-medium text-indigo-700 backdrop-blur-sm dark:border-indigo-500 dark:bg-indigo-950/80 dark:text-indigo-300">
+          <Plus size={16} /> Dateien hier ablegen, um sie anzuhängen
+        </div>
+      )}
+      <ComposeRibbon
+        editor={editorRef}
+        onAttach={() => fileInput.current?.click()}
+        onOpenSignature={() => setSignatureOpen((v) => !v)}
+        onOpenTemplates={() => setTemplatesOpen(true)}
+        importance={importance}
+        onImportanceChange={setImportance}
+        showBcc={showBcc}
+        onToggleBcc={() => setShowBcc((v) => !v)}
+        requestReadReceipt={requestReadReceipt}
+        onToggleReadReceipt={() => setRequestReadReceipt((v) => !v)}
+        delayAt={delayAt}
+        onDelayChange={setDelayAt}
+        replyTo={replyTo}
+        onReplyToChange={setReplyTo}
+        plainTextMode={plainTextMode}
+        onTogglePlainText={() => setPlainTextMode((v) => !v)}
+        onWordCount={(count) => showInfo(`${count} Wörter`)}
+      />
+
+      {signatureOpen && account && (
+        <div className="border-b border-zinc-200/80 bg-zinc-50/60 px-7 py-3 dark:border-zinc-800/80 dark:bg-zinc-950/40">
+          <div className="flex items-center justify-between">
+            <p className="text-[11px] font-semibold tracking-wide text-zinc-400 uppercase">Signaturen für dieses Konto</p>
+            <button
+              onClick={() => setSignatureOpen(false)}
+              className="rounded-full p-1 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+            >
+              <X size={13} />
+            </button>
+          </div>
+          <div className="mt-2 space-y-1.5">
+            {signatures.length === 0 && (
+              <p className="text-[12px] text-zinc-400">Noch keine Signaturen angelegt.</p>
+            )}
+            {signatures.map((s) => (
+              <div key={s.id} className="rounded-xl border border-zinc-200/80 bg-white/70 dark:border-zinc-800 dark:bg-zinc-900/40">
+                <div className="flex items-center gap-2 px-2.5 py-1.5">
+                  <button
+                    onClick={() => persistSignatures(signatures, s.id)}
+                    title={s.id === defaultSigId ? 'Standard-Signatur' : 'Als Standard festlegen'}
+                    className={clsx(
+                      'flex h-4 w-4 shrink-0 items-center justify-center rounded-full border transition',
+                      s.id === defaultSigId
+                        ? 'border-indigo-500 bg-indigo-500 text-white'
+                        : 'border-zinc-300 text-transparent hover:border-indigo-400 dark:border-zinc-600',
+                    )}
+                  >
+                    <Check size={10} />
+                  </button>
+                  <input
+                    value={s.name}
+                    onChange={(e) => handleRenameSignature(s.id, e.target.value)}
+                    className="min-w-0 flex-1 bg-transparent text-[12.5px] font-medium text-zinc-700 outline-none dark:text-zinc-200"
+                  />
+                  <button
+                    onClick={() => setEditingSigId(editingSigId === s.id ? null : s.id)}
+                    className="shrink-0 rounded-full p-1 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+                  >
+                    <Pencil size={12} />
+                  </button>
+                  <button
+                    onClick={() => handleDeleteSignature(s.id)}
+                    className="shrink-0 rounded-full p-1 text-zinc-400 transition hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-950/40"
+                  >
+                    <Trash2 size={12} />
+                  </button>
+                </div>
+                {editingSigId === s.id && (
+                  <textarea
+                    value={s.body}
+                    onChange={(e) => handleEditSignatureBody(s.id, e.target.value)}
+                    rows={3}
+                    autoFocus
+                    className="w-full resize-none border-t border-zinc-100 bg-transparent px-2.5 py-2 text-[12.5px] text-zinc-700 outline-none dark:border-zinc-800 dark:text-zinc-200"
+                    placeholder="z. B. Viele Grüße&#10;Dein Name"
+                  />
+                )}
+              </div>
+            ))}
+          </div>
+          <button
+            onClick={handleAddSignature}
+            className="mt-2 flex items-center gap-1 text-[11.5px] font-medium text-indigo-600 transition hover:text-indigo-700 dark:text-indigo-400"
+          >
+            <Plus size={12} /> Neue Signatur
+          </button>
+        </div>
+      )}
+
+      <div className="flex border-b border-zinc-200/80 dark:border-zinc-800/80">
+        <div className="flex w-24 shrink-0 items-center justify-center border-r border-zinc-200/80 dark:border-zinc-800/80">
+          <button
+            onClick={handleSend}
+            disabled={sending}
+            className={clsx(
+              'flex flex-col items-center gap-1 rounded-lg px-3 py-2.5 text-indigo-600 transition hover:bg-indigo-50 disabled:cursor-not-allowed disabled:opacity-50 dark:text-indigo-400 dark:hover:bg-indigo-500/10',
+            )}
+          >
+            <Send size={22} />
+            <span className="text-[11px] font-medium">{sending ? 'Sende…' : 'Senden'}</span>
+          </button>
+        </div>
+        <div className="flex flex-1 flex-col">
+          <div className="flex items-center gap-3 border-b border-zinc-100/80 px-4 py-1.5 dark:border-zinc-800/50">
+            <select
+              value={account?.id ?? ''}
+              onChange={(e) => onAccountChange(e.target.value)}
+              className="w-28 shrink-0 rounded-md border border-zinc-300 bg-white px-2 py-1 text-[11.5px] font-medium text-zinc-600 outline-none dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-300"
+            >
+              {sendableAccounts.map((a) => (
+                <option key={a.id} value={a.id}>
+                  {a.label}
+                </option>
+              ))}
+            </select>
+            <span className="flex-1 truncate text-[13px] text-zinc-500 dark:text-zinc-400">{account?.email}</span>
+          </div>
+          <div className="flex items-center gap-3 border-b border-zinc-100/80 py-1.5 pr-4 dark:border-zinc-800/50">
+            <div className="flex w-28 shrink-0 items-center justify-center rounded-md border border-zinc-300 py-1 text-[11.5px] text-zinc-500 dark:border-zinc-700 dark:text-zinc-400">
+              An
+            </div>
+            <RecipientInput value={to} onChange={setTo} placeholder="empfaenger@example.com" />
+            {!showCc && (
+              <button
+                onClick={() => setShowCc(true)}
+                className="shrink-0 rounded-full px-2 py-0.5 text-[11px] text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+              >
+                Cc
+              </button>
+            )}
+          </div>
+          {showCc && (
+            <div className="flex items-center gap-3 border-b border-zinc-100/80 py-1.5 pr-4 dark:border-zinc-800/50">
+              <div className="flex w-28 shrink-0 items-center justify-center rounded-md border border-zinc-300 py-1 text-[11.5px] text-zinc-500 dark:border-zinc-700 dark:text-zinc-400">
+                Cc
+              </div>
+              <RecipientInput value={cc} onChange={setCc} />
+            </div>
+          )}
+          {showBcc && (
+            <div className="flex items-center gap-3 border-b border-zinc-100/80 py-1.5 pr-4 dark:border-zinc-800/50">
+              <div className="flex w-28 shrink-0 items-center justify-center rounded-md border border-zinc-300 py-1 text-[11.5px] text-zinc-500 dark:border-zinc-700 dark:text-zinc-400">
+                Bcc
+              </div>
+              <RecipientInput value={bcc} onChange={setBcc} />
+            </div>
+          )}
+          <div className="flex items-center gap-3 py-1.5 pr-4">
+            <div className="flex w-28 shrink-0 items-center justify-center rounded-md border border-transparent py-1 text-[11.5px] text-zinc-400">
+              Betreff
+            </div>
+            <input
+              value={subject}
+              onChange={(e) => setSubject(e.target.value)}
+              className="flex-1 bg-transparent text-[13px] font-medium text-zinc-800 outline-none dark:text-zinc-100"
+            />
+          </div>
+        </div>
+      </div>
+
+      <RichTextEditor ref={editorRef} html={body} resetKey={initial} onChange={setBody} placeholder="Schreib etwas Geiles…" />
+
+      {attachments.length > 0 && (
+        <div className="flex flex-wrap gap-2 border-t border-zinc-100/80 px-7 py-3 dark:border-zinc-800/50">
+          {attachments.map((att, i) => (
+            <span
+              key={i}
+              className="flex items-center gap-1.5 rounded-full bg-zinc-100 px-2.5 py-1 text-[11px] text-zinc-600 dark:bg-zinc-800 dark:text-zinc-300"
+            >
+              {att.filename}
+              <span className="text-zinc-400">
+                {formatBytes(Math.ceil((att.content_base64.length * 3) / 4))}
+              </span>
+              <button
+                onClick={() => setAttachments((prev) => prev.filter((_, idx) => idx !== i))}
+                className="text-zinc-400 hover:text-red-500"
+              >
+                <X size={11} />
+              </button>
+            </span>
+          ))}
+        </div>
+      )}
+
+      {info && (
+        <p className="border-t border-indigo-100 bg-indigo-50/80 px-7 py-2 text-[12px] text-indigo-600 dark:border-indigo-950 dark:bg-indigo-950/40 dark:text-indigo-400">
+          {info}
+        </p>
+      )}
+
+      {error && (
+        <p className="border-t border-red-100 bg-red-50/80 px-7 py-2.5 text-[12px] text-red-600 dark:border-red-950 dark:bg-red-950/40 dark:text-red-400">
+          {error}
+        </p>
+      )}
+
+      <div className="flex items-center justify-between border-t border-zinc-200/80 px-7 py-2.5 dark:border-zinc-800/80">
+        <input ref={fileInput} type="file" multiple hidden onChange={(e) => handleFiles(e.target.files)} />
+        <span className="flex items-center gap-1.5 text-[11px] text-zinc-400">
+          <PenLine size={12} /> {plainTextMode ? 'Nur-Text-Format' : 'HTML-Format'}
+          {delayAt && ` · Wird gesendet am ${new Date(delayAt).toLocaleString('de-DE')}`}
+        </span>
+        <button
+          onClick={onDiscard}
+          title="Verwerfen"
+          className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+        >
+          <X size={16} />
+        </button>
+      </div>
+
+      <TemplatesModal
+        open={templatesOpen}
+        onClose={() => setTemplatesOpen(false)}
+        onToast={showInfo}
+        onInsert={handleInsertTemplate}
+      />
+    </div>
+  )
+}
diff --git a/src/components/ComposeRibbon.tsx b/src/components/ComposeRibbon.tsx
new file mode 100644
index 0000000..a1c7929
--- /dev/null
+++ b/src/components/ComposeRibbon.tsx
@@ -0,0 +1,301 @@
+import { useRef, useState } from 'react'
+import {
+  ArrowDown,
+  ArrowUp,
+  BookUser,
+  Bold,
+  CalendarClock,
+  CheckCheck,
+  Clipboard,
+  Clock,
+  Code2,
+  Copy,
+  FileText,
+  Image as ImageIcon,
+  Italic,
+  Link2,
+  List,
+  ListOrdered,
+  Lock,
+  Mail,
+  Minus,
+  Paintbrush,
+  Palette,
+  Paperclip,
+  PenLine,
+  Quote,
+  RemoveFormatting,
+  Save,
+  Scissors,
+  Search,
+  SpellCheck,
+  Strikethrough,
+  Truck,
+  Type,
+  Underline,
+  User,
+} from 'lucide-react'
+import type { RichTextEditorHandle } from './RichTextEditor'
+import { ClassicButton, ClassicDropdown, ClassicRibbonBody, ClassicRibbonGroup, ClassicTabBar } from './ClassicRibbonUI'
+
+type ComposeTab = 'message' | 'insert' | 'options' | 'format' | 'review'
+
+function DelayDropdown({ value, onChange }: { value: string; onChange: (v: string) => void }) {
+  const [open, setOpen] = useState(false)
+  return (
+    <ClassicDropdown open={open} onOpenChange={setOpen} widthClass="w-64" button={<ClassicButton icon={Clock} label="Übermittlung verzögern" active={!!value} />}>
+      <div className="space-y-2 px-3 py-2">
+        <label className="block text-[11px] font-medium text-zinc-500 dark:text-zinc-400">Senden am</label>
+        <input
+          type="datetime-local"
+          value={value}
+          onChange={(e) => onChange(e.target.value)}
+          className="w-full rounded border border-zinc-300 bg-white px-2 py-1 text-[12px] text-zinc-800 dark:border-zinc-700 dark:bg-zinc-800 dark:text-zinc-100"
+        />
+        {value && (
+          <button onClick={() => onChange('')} className="text-[11px] text-red-500 hover:text-red-600">
+            Verzögerung entfernen
+          </button>
+        )}
+      </div>
+    </ClassicDropdown>
+  )
+}
+
+function ReplyToDropdown({ value, onChange }: { value: string; onChange: (v: string) => void }) {
+  const [open, setOpen] = useState(false)
+  return (
+    <ClassicDropdown open={open} onOpenChange={setOpen} widthClass="w-64" button={<ClassicButton icon={Mail} label="Antworten richten an" active={!!value} />}>
+      <div className="space-y-2 px-3 py-2">
+        <label className="block text-[11px] font-medium text-zinc-500 dark:text-zinc-400">Reply-To-Adresse</label>
+        <input
+          type="email"
+          value={value}
+          onChange={(e) => onChange(e.target.value)}
+          placeholder="antworten@example.com"
+          className="w-full rounded border border-zinc-300 bg-white px-2 py-1 text-[12px] text-zinc-800 dark:border-zinc-700 dark:bg-zinc-800 dark:text-zinc-100"
+        />
+      </div>
+    </ClassicDropdown>
+  )
+}
+
+export function ComposeRibbon({
+  editor,
+  onAttach,
+  onOpenSignature,
+  onOpenTemplates,
+  onOpenContactPicker,
+  importance,
+  onImportanceChange,
+  showBcc,
+  onToggleBcc,
+  requestReadReceipt,
+  onToggleReadReceipt,
+  delayAt,
+  onDelayChange,
+  replyTo,
+  onReplyToChange,
+  plainTextMode,
+  onTogglePlainText,
+  onWordCount,
+}: {
+  editor: React.RefObject<RichTextEditorHandle | null>
+  onAttach: () => void
+  onOpenSignature: () => void
+  onOpenTemplates: () => void
+  onOpenContactPicker?: () => void
+  importance: 'high' | 'low' | null
+  onImportanceChange: (v: 'high' | 'low' | null) => void
+  showBcc: boolean
+  onToggleBcc: () => void
+  requestReadReceipt: boolean
+  onToggleReadReceipt: () => void
+  delayAt: string
+  onDelayChange: (v: string) => void
+  replyTo: string
+  onReplyToChange: (v: string) => void
+  plainTextMode: boolean
+  onTogglePlainText: () => void
+  onWordCount: (count: number) => void
+}) {
+  const [tab, setTab] = useState<ComposeTab>('message')
+  const imageInputRef = useRef<HTMLInputElement>(null)
+
+  function exec(command: string, value?: string) {
+    editor.current?.exec(command, value)
+  }
+
+  function handleImagePick(file: File | undefined) {
+    if (!file) return
+    const reader = new FileReader()
+    reader.onload = () => exec('insertImage', reader.result as string)
+    reader.readAsDataURL(file)
+  }
+
+  const tabs = [
+    { id: 'message', label: 'Nachricht' },
+    { id: 'insert', label: 'Einfügen' },
+    { id: 'options', label: 'Optionen' },
+    { id: 'format', label: 'Text formatieren' },
+    { id: 'review', label: 'Überprüfen' },
+  ]
+
+  return (
+    <div className="w-full border-b border-[#0d3a6e]">
+      <ClassicTabBar tabs={tabs} active={tab} onChange={(id) => setTab(id as ComposeTab)} />
+      <ClassicRibbonBody>
+        {tab === 'message' && (
+          <>
+            <ClassicRibbonGroup caption="Zwischenablage">
+              <div className="flex flex-col gap-0.5 pt-1">
+                <ClassicButton size="small" icon={Clipboard} label="Einfügen" disabled title="Zwischenablage-Zugriff nicht verfügbar" />
+                <ClassicButton size="small" icon={Scissors} label="Ausschneiden" onClick={() => exec('cut')} />
+                <ClassicButton size="small" icon={Copy} label="Kopieren" onClick={() => exec('copy')} />
+              </div>
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Standardtext">
+              <div className="grid grid-cols-4 gap-0.5 pt-1">
+                <ClassicButton size="small" icon={Bold} label="" title="Fett" onClick={() => exec('bold')} />
+                <ClassicButton size="small" icon={Italic} label="" title="Kursiv" onClick={() => exec('italic')} />
+                <ClassicButton size="small" icon={Underline} label="" title="Unterstrichen" onClick={() => exec('underline')} />
+                <ClassicButton size="small" icon={Strikethrough} label="" title="Durchgestrichen" onClick={() => exec('strikeThrough')} />
+                <ClassicButton size="small" icon={List} label="" title="Liste" onClick={() => exec('insertUnorderedList')} />
+                <ClassicButton size="small" icon={ListOrdered} label="" title="Nummeriert" onClick={() => exec('insertOrderedList')} />
+                <ClassicButton size="small" icon={Quote} label="" title="Zitat" onClick={() => exec('formatBlock', 'blockquote')} />
+                <ClassicButton
+                  size="small"
+                  icon={Link2}
+                  label=""
+                  title="Link einfügen"
+                  onClick={() => {
+                    const url = window.prompt('Link-URL:', 'https://')
+                    if (url) exec('createLink', url)
+                  }}
+                />
+                <ClassicButton size="small" icon={RemoveFormatting} label="" title="Formatierung entfernen" onClick={() => exec('removeFormat')} />
+              </div>
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Namen">
+              <ClassicButton icon={BookUser} label="Adressbuch" onClick={onOpenContactPicker} disabled={!onOpenContactPicker} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Einfügen">
+              <ClassicButton icon={Paperclip} label="Datei anfügen" onClick={onAttach} />
+              <ClassicButton icon={PenLine} label="Signatur" onClick={onOpenSignature} />
+              <ClassicButton icon={FileText} label="Vorlagen" onClick={onOpenTemplates} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Markierungen">
+              <ClassicButton
+                icon={ArrowUp}
+                label="Wichtigkeit: hoch"
+                onClick={() => onImportanceChange(importance === 'high' ? null : 'high')}
+                active={importance === 'high'}
+              />
+              <ClassicButton
+                icon={ArrowDown}
+                label="Wichtigkeit: niedrig"
+                onClick={() => onImportanceChange(importance === 'low' ? null : 'low')}
+                active={importance === 'low'}
+              />
+            </ClassicRibbonGroup>
+          </>
+        )}
+
+        {tab === 'insert' && (
+          <>
+            <ClassicRibbonGroup caption="Einschließen">
+              <ClassicButton icon={Paperclip} label="Datei anfügen" onClick={onAttach} />
+              <ClassicButton icon={PenLine} label="Signatur" onClick={onOpenSignature} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Illustrationen">
+              <input
+                ref={imageInputRef}
+                type="file"
+                accept="image/*"
+                hidden
+                onChange={(e) => handleImagePick(e.target.files?.[0])}
+              />
+              <ClassicButton icon={ImageIcon} label="Bilder" onClick={() => imageInputRef.current?.click()} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Links">
+              <ClassicButton
+                icon={Link2}
+                label="Link"
+                onClick={() => {
+                  const url = window.prompt('Link-URL:', 'https://')
+                  if (url) exec('createLink', url)
+                }}
+              />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Text">
+              <ClassicButton icon={Minus} label="Horizontale Linie" onClick={() => exec('insertHorizontalRule')} />
+              <ClassicButton
+                icon={CalendarClock}
+                label="Datum und Uhrzeit"
+                onClick={() => exec('insertText', new Date().toLocaleString('de-DE'))}
+              />
+            </ClassicRibbonGroup>
+          </>
+        )}
+
+        {tab === 'options' && (
+          <>
+            <ClassicRibbonGroup caption="Designs">
+              <ClassicButton icon={Palette} label="Designs" disabled title="Nicht verfügbar" />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Felder anzeigen">
+              <ClassicButton icon={Mail} label="Bcc" onClick={onToggleBcc} active={showBcc} />
+              <ClassicButton icon={User} label="Von" active disabled title="Von-Feld ist immer sichtbar" />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Verschlüsseln">
+              <ClassicButton icon={Lock} label="Verschlüsseln" disabled title="S/MIME: in dieser Version nicht verfügbar" />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Verlauf">
+              <ClassicButton icon={CheckCheck} label="Lesebestät. anfordern" onClick={onToggleReadReceipt} active={requestReadReceipt} />
+              <ClassicButton icon={Truck} label="Zustellungsbestät." disabled title="Nicht zuverlässig standardisiert: nicht verfügbar" />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Weitere Optionen">
+              <DelayDropdown value={delayAt} onChange={onDelayChange} />
+              <ReplyToDropdown value={replyTo} onChange={onReplyToChange} />
+              <ClassicButton icon={Save} label="Speichern unter" disabled title="Nicht verfügbar" />
+            </ClassicRibbonGroup>
+          </>
+        )}
+
+        {tab === 'format' && (
+          <>
+            <ClassicRibbonGroup caption="Format">
+              <ClassicButton icon={Code2} label={plainTextMode ? 'Nur Text' : 'HTML'} onClick={onTogglePlainText} active={plainTextMode} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Schriftart">
+              <div className="grid grid-cols-3 gap-0.5 pt-1">
+                <ClassicButton size="small" icon={Bold} label="" title="Fett" onClick={() => exec('bold')} />
+                <ClassicButton size="small" icon={Italic} label="" title="Kursiv" onClick={() => exec('italic')} />
+                <ClassicButton size="small" icon={Underline} label="" title="Unterstrichen" onClick={() => exec('underline')} />
+              </div>
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Formatvorlagen">
+              <ClassicButton size="small" icon={Paintbrush} label="Standard" onClick={() => exec('formatBlock', 'P')} />
+              <ClassicButton size="small" icon={Paintbrush} label="Überschrift 1" onClick={() => exec('formatBlock', 'H1')} />
+              <ClassicButton size="small" icon={Paintbrush} label="Überschrift 2" onClick={() => exec('formatBlock', 'H2')} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Bearbeiten">
+              <ClassicButton icon={Search} label="Suchen" disabled title="Nicht verfügbar" />
+            </ClassicRibbonGroup>
+          </>
+        )}
+
+        {tab === 'review' && (
+          <>
+            <ClassicRibbonGroup caption="Rechtschreibung">
+              <ClassicButton icon={SpellCheck} label="Rechtschreibung und Grammatik" active disabled title="Automatische Prüfung des Browsers ist aktiv" />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Sprache">
+              <ClassicButton icon={Type} label="Wörter zählen" onClick={() => onWordCount(editor.current?.wordCount() ?? 0)} />
+            </ClassicRibbonGroup>
+          </>
+        )}
+      </ClassicRibbonBody>
+    </div>
+  )
+}
diff --git a/src/components/ContactGroupModal.tsx b/src/components/ContactGroupModal.tsx
new file mode 100644
index 0000000..a1a0252
--- /dev/null
+++ b/src/components/ContactGroupModal.tsx
@@ -0,0 +1,195 @@
+import { useEffect, useState } from 'react'
+import { ArrowLeft, Pencil, Plus, Trash2, X } from 'lucide-react'
+import type { Contact, ContactGroup, NewContactGroup } from '../types'
+
+const inputClass =
+  'rounded-lg border border-zinc-200 bg-white px-3 py-1.5 text-[13px] text-zinc-800 outline-none transition focus:border-indigo-400 focus:ring-2 focus:ring-indigo-100 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-100 dark:focus:ring-indigo-500/20'
+
+export function ContactGroupModal({
+  open,
+  contacts,
+  groups,
+  onClose,
+  onSave,
+  onDelete,
+}: {
+  open: boolean
+  contacts: Contact[]
+  groups: ContactGroup[]
+  onClose: () => void
+  onSave: (data: NewContactGroup, existingId: string | null) => Promise<void>
+  onDelete: (group: ContactGroup) => Promise<void>
+}) {
+  const [editing, setEditing] = useState<ContactGroup | 'new' | null>(null)
+  const [name, setName] = useState('')
+  const [memberIds, setMemberIds] = useState<Set<string>>(new Set())
+  const [saving, setSaving] = useState(false)
+  const [confirmDeleteId, setConfirmDeleteId] = useState<string | null>(null)
+
+  useEffect(() => {
+    if (!open) {
+      setEditing(null)
+      setConfirmDeleteId(null)
+    }
+  }, [open])
+
+  if (!open) return null
+
+  function startNew() {
+    setEditing('new')
+    setName('')
+    setMemberIds(new Set())
+  }
+
+  function startEdit(g: ContactGroup) {
+    setEditing(g)
+    setName(g.name)
+    setMemberIds(new Set(g.member_ids))
+  }
+
+  function toggleMember(id: string) {
+    setMemberIds((prev) => {
+      const next = new Set(prev)
+      if (next.has(id)) next.delete(id)
+      else next.add(id)
+      return next
+    })
+  }
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault()
+    if (!name.trim()) return
+    setSaving(true)
+    try {
+      await onSave({ name: name.trim(), member_ids: Array.from(memberIds) }, editing === 'new' ? null : (editing?.id ?? null))
+      setEditing(null)
+    } finally {
+      setSaving(false)
+    }
+  }
+
+  return (
+    <div className="animate-overlay-in fixed inset-0 z-50 flex items-center justify-center bg-zinc-900/40 p-6 backdrop-blur-sm dark:bg-black/60">
+      <div className="animate-panel-in flex max-h-[85vh] w-full max-w-md flex-col overflow-hidden rounded-[28px] border border-white/70 bg-white/95 shadow-[0_24px_70px_-12px_rgba(15,15,25,0.35)] ring-1 ring-black/[0.03] backdrop-blur-2xl dark:border-white/10 dark:bg-zinc-900/90 dark:shadow-[0_24px_70px_-12px_rgba(0,0,0,0.6)]">
+        <div className="flex items-center justify-between border-b border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <div className="flex items-center gap-2">
+            {editing && (
+              <button
+                onClick={() => setEditing(null)}
+                className="rounded-full p-1 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+              >
+                <ArrowLeft size={15} />
+              </button>
+            )}
+            <h2 className="text-[15px] font-semibold tracking-tight text-zinc-800 dark:text-zinc-100">
+              {editing === 'new' ? 'Neue Gruppe' : editing ? 'Gruppe bearbeiten' : 'Kontaktgruppen'}
+            </h2>
+          </div>
+          <button
+            onClick={onClose}
+            className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+          >
+            <X size={16} />
+          </button>
+        </div>
+
+        {editing ? (
+          <form onSubmit={handleSubmit} className="flex flex-1 flex-col overflow-hidden">
+            <div className="space-y-3 px-6 py-4">
+              <label className="flex flex-col gap-1">
+                <span className="text-[11.5px] font-medium text-zinc-500 dark:text-zinc-400">Name</span>
+                <input className={inputClass} value={name} onChange={(e) => setName(e.target.value)} autoFocus required />
+              </label>
+              <p className="text-[11px] font-semibold tracking-wide text-zinc-400 uppercase">Mitglieder</p>
+            </div>
+            <div className="flex-1 space-y-0.5 overflow-y-auto px-6 pb-4">
+              {contacts.length === 0 ? (
+                <p className="text-[12.5px] text-zinc-400">Keine Kontakte vorhanden.</p>
+              ) : (
+                contacts.map((c) => (
+                  <label
+                    key={c.id}
+                    className="flex items-center gap-2.5 rounded-xl px-2 py-1.5 text-[12.5px] text-zinc-700 transition hover:bg-zinc-50 dark:text-zinc-200 dark:hover:bg-zinc-800/60"
+                  >
+                    <input
+                      type="checkbox"
+                      checked={memberIds.has(c.id)}
+                      onChange={() => toggleMember(c.id)}
+                      className="rounded border-zinc-300"
+                    />
+                    <span className="min-w-0 flex-1 truncate">{c.name || c.email}</span>
+                    <span className="shrink-0 truncate text-[11px] text-zinc-400">{c.email}</span>
+                  </label>
+                ))
+              )}
+            </div>
+            <div className="flex justify-end gap-2 border-t border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+              <button
+                type="button"
+                onClick={() => setEditing(null)}
+                className="rounded-full px-4 py-2 text-[13px] font-medium text-zinc-500 transition hover:bg-zinc-100 dark:hover:bg-zinc-800"
+              >
+                Abbrechen
+              </button>
+              <button
+                type="submit"
+                disabled={saving}
+                className="rounded-full bg-gradient-to-b from-indigo-500 to-indigo-600 px-5 py-2 text-[13px] font-medium text-white shadow-lg shadow-indigo-600/25 transition hover:from-indigo-400 hover:to-indigo-500 disabled:opacity-60"
+              >
+                {saving ? 'Speichere…' : 'Speichern'}
+              </button>
+            </div>
+          </form>
+        ) : (
+          <>
+            <div className="flex-1 space-y-1.5 overflow-y-auto px-6 py-4">
+              {groups.length === 0 ? (
+                <p className="text-[12.5px] text-zinc-400">Noch keine Gruppen angelegt.</p>
+              ) : (
+                groups.map((g) => (
+                  <div
+                    key={g.id}
+                    className="flex items-center gap-2.5 rounded-xl border border-zinc-200/80 px-3 py-2 dark:border-zinc-800"
+                  >
+                    <span className="min-w-0 flex-1 truncate text-[13px] text-zinc-700 dark:text-zinc-200">
+                      {g.name} <span className="text-zinc-400">({g.member_ids.length})</span>
+                    </span>
+                    <button
+                      onClick={() => startEdit(g)}
+                      className="shrink-0 rounded-full p-1 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+                    >
+                      <Pencil size={13} />
+                    </button>
+                    {confirmDeleteId === g.id ? (
+                      <button
+                        onClick={() => onDelete(g)}
+                        className="shrink-0 rounded-full bg-red-600 px-2.5 py-1 text-[11px] font-medium text-white transition hover:bg-red-500"
+                      >
+                        Wirklich löschen?
+                      </button>
+                    ) : (
+                      <button
+                        onClick={() => setConfirmDeleteId(g.id)}
+                        className="shrink-0 rounded-full p-1 text-zinc-400 transition hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-950/40"
+                      >
+                        <Trash2 size={13} />
+                      </button>
+                    )}
+                  </div>
+                ))
+              )}
+            </div>
+            <div className="border-t border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+              <button
+                onClick={startNew}
+                className="flex w-full items-center justify-center gap-1.5 rounded-full bg-gradient-to-b from-indigo-500 to-indigo-600 py-2 text-[13px] font-medium text-white shadow-lg shadow-indigo-600/25 transition hover:from-indigo-400 hover:to-indigo-500"
+              >
+                <Plus size={14} /> Neue Gruppe
+              </button>
+            </div>
+          </>
+        )}
+      </div>
+    </div>
+  )
+}
diff --git a/src/components/ContactModal.tsx b/src/components/ContactModal.tsx
new file mode 100644
index 0000000..3e47234
--- /dev/null
+++ b/src/components/ContactModal.tsx
@@ -0,0 +1,176 @@
+import { useEffect, useState } from 'react'
+import { X } from 'lucide-react'
+import type { Contact, NewContact } from '../types'
+
+const inputClass =
+  'rounded-lg border border-zinc-200 bg-white px-3 py-1.5 text-[13px] text-zinc-800 outline-none transition focus:border-indigo-400 focus:ring-2 focus:ring-indigo-100 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-100 dark:focus:ring-indigo-500/20'
+
+function Field({ label, children }: { label: string; children: React.ReactNode }) {
+  return (
+    <label className="flex flex-col gap-1">
+      <span className="text-[11.5px] font-medium text-zinc-500 dark:text-zinc-400">{label}</span>
+      {children}
+    </label>
+  )
+}
+
+export function ContactModal({
+  open,
+  contact,
+  onClose,
+  onSave,
+  onDelete,
+}: {
+  open: boolean
+  contact: Contact | null
+  onClose: () => void
+  onSave: (data: NewContact, existingId: string | null) => Promise<void>
+  onDelete: (contact: Contact) => Promise<void>
+}) {
+  const [name, setName] = useState('')
+  const [email, setEmail] = useState('')
+  const [phone, setPhone] = useState('')
+  const [address, setAddress] = useState('')
+  const [company, setCompany] = useState('')
+  const [notes, setNotes] = useState('')
+  const [saving, setSaving] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+
+  useEffect(() => {
+    if (open) {
+      setName(contact?.name ?? '')
+      setEmail(contact?.email ?? '')
+      setPhone(contact?.phone ?? '')
+      setAddress(contact?.address ?? '')
+      setCompany(contact?.company ?? '')
+      setNotes(contact?.notes ?? '')
+      setError(null)
+    }
+  }, [open, contact])
+
+  if (!open) return null
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault()
+    setError(null)
+    setSaving(true)
+    try {
+      await onSave(
+        {
+          name: name.trim() || email.trim() || phone.trim() || address.trim() || 'Unbenannt',
+          email: email.trim() || undefined,
+          phone: phone.trim() || undefined,
+          address: address.trim() || undefined,
+          company: company.trim() || undefined,
+          notes: notes.trim() || undefined,
+        },
+        contact?.id ?? null,
+      )
+    } catch (err) {
+      setError(String(err))
+      setSaving(false)
+      return
+    }
+    setSaving(false)
+  }
+
+  return (
+    <div className="animate-overlay-in fixed inset-0 z-50 flex items-center justify-center bg-zinc-900/40 p-6 backdrop-blur-sm dark:bg-black/60">
+      <form
+        onSubmit={handleSubmit}
+        className="animate-panel-in flex w-full max-w-sm flex-col overflow-hidden rounded-[28px] border border-white/70 bg-white/95 shadow-[0_24px_70px_-12px_rgba(15,15,25,0.35)] ring-1 ring-black/[0.03] backdrop-blur-2xl dark:border-white/10 dark:bg-zinc-900/90 dark:shadow-[0_24px_70px_-12px_rgba(0,0,0,0.6)]"
+      >
+        <div className="flex items-center justify-between border-b border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <h2 className="text-[15px] font-semibold tracking-tight text-zinc-800 dark:text-zinc-100">
+            {contact ? 'Kontakt bearbeiten' : 'Kontakt hinzufügen'}
+          </h2>
+          <button
+            type="button"
+            onClick={onClose}
+            className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+          >
+            <X size={16} />
+          </button>
+        </div>
+
+        <div className="flex-1 space-y-3.5 px-6 py-5">
+          <Field label="Name">
+            <input className={inputClass} value={name} onChange={(e) => setName(e.target.value)} placeholder="Ada Lovelace" />
+          </Field>
+          <Field label="E-Mail-Adresse (optional)">
+            <input
+              className={inputClass}
+              type="email"
+              value={email}
+              onChange={(e) => setEmail(e.target.value)}
+              placeholder="ada@example.com"
+            />
+          </Field>
+          <Field label="Telefon (optional)">
+            <input
+              className={inputClass}
+              type="tel"
+              value={phone}
+              onChange={(e) => setPhone(e.target.value)}
+              placeholder="+49 30 1234567"
+            />
+          </Field>
+          <Field label="Adresse (optional)">
+            <input
+              className={inputClass}
+              value={address}
+              onChange={(e) => setAddress(e.target.value)}
+              placeholder="Musterstraße 1, 12345 Berlin"
+            />
+          </Field>
+          <Field label="Firma (optional)">
+            <input className={inputClass} value={company} onChange={(e) => setCompany(e.target.value)} />
+          </Field>
+          <Field label="Notizen (optional)">
+            <textarea
+              className={`${inputClass} min-h-16 resize-none`}
+              value={notes}
+              onChange={(e) => setNotes(e.target.value)}
+            />
+          </Field>
+
+          {error && (
+            <p className="rounded-lg bg-red-50 px-3 py-2 text-[12px] text-red-600 dark:bg-red-950/40 dark:text-red-400">
+              {error}
+            </p>
+          )}
+        </div>
+
+        <div className="flex items-center justify-between border-t border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          {contact ? (
+            <button
+              type="button"
+              onClick={() => onDelete(contact)}
+              className="rounded-full px-3 py-2 text-[12.5px] font-medium text-red-500 transition hover:bg-red-50 dark:hover:bg-red-950/40"
+            >
+              Löschen
+            </button>
+          ) : (
+            <span />
+          )}
+          <div className="flex gap-2">
+            <button
+              type="button"
+              onClick={onClose}
+              className="rounded-full px-4 py-2 text-[13px] font-medium text-zinc-500 transition hover:bg-zinc-100 dark:hover:bg-zinc-800"
+            >
+              Abbrechen
+            </button>
+            <button
+              type="submit"
+              disabled={saving}
+              className="rounded-full bg-gradient-to-b from-indigo-500 to-indigo-600 px-5 py-2 text-[13px] font-medium text-white shadow-lg shadow-indigo-600/25 transition hover:from-indigo-400 hover:to-indigo-500 hover:shadow-indigo-600/35 active:scale-[0.98] disabled:opacity-60"
+            >
+              {saving ? 'Speichere…' : 'Speichern'}
+            </button>
+          </div>
+        </div>
+      </form>
+    </div>
+  )
+}
diff --git a/src/components/ContactsView.tsx b/src/components/ContactsView.tsx
new file mode 100644
index 0000000..5fc3f47
--- /dev/null
+++ b/src/components/ContactsView.tsx
@@ -0,0 +1,334 @@
+import { useMemo, useState } from 'react'
+import { open, save } from '@tauri-apps/plugin-dialog'
+import { Cloud, Download, HardDrive, Mail, Plus, RefreshCw, Search, Star, Upload, UsersRound, UserRound } from 'lucide-react'
+import clsx from 'clsx'
+import type { Account, Contact, ContactGroup } from '../types'
+import { Avatar } from './Avatar'
+import { api } from '../lib/api'
+import { GoogleContactsMenu } from './GoogleContactsMenu'
+
+function contactSourceKey(c: Contact): string {
+  return c.google_account_id ? `google:${c.google_account_id}` : 'local'
+}
+
+function contactSourceLabel(c: Contact, accounts: Account[]): string {
+  if (!c.google_account_id) return 'Lokal'
+  const acc = accounts.find((a) => a.id === c.google_account_id)
+  return acc ? `Google – ${acc.label}` : 'Google'
+}
+
+export function ContactsView({
+  contacts,
+  groups,
+  loading,
+  onAdd,
+  onEdit,
+  onToggleFavorite,
+  onCompose,
+  onContextMenu,
+  onComposeToEmails,
+  onManageGroups,
+  onRefresh,
+  onToast,
+  googleAccounts,
+  onSyncGoogleContacts,
+  onReconnectGoogleAccount,
+}: {
+  contacts: Contact[]
+  groups: ContactGroup[]
+  loading: boolean
+  onAdd: () => void
+  onEdit: (c: Contact) => void
+  onToggleFavorite: (c: Contact) => void
+  onCompose: (c: Contact) => void
+  onContextMenu?: (e: React.MouseEvent, c: Contact) => void
+  onComposeToEmails: (emails: string[]) => void
+  onManageGroups: () => void
+  onRefresh: () => void
+  onToast: (msg: string) => void
+  googleAccounts: Account[]
+  onSyncGoogleContacts: (accountId: string) => Promise<void>
+  onReconnectGoogleAccount: (accountId: string) => Promise<void>
+}) {
+  const [query, setQuery] = useState('')
+  const [selectedGroupId, setSelectedGroupId] = useState<string | null>(null)
+  const selectedGroup = groups.find((g) => g.id === selectedGroupId) ?? null
+  const [selectedSourceKey, setSelectedSourceKey] = useState<string | null>(null)
+
+  const sourceOptions = useMemo(() => {
+    const map = new Map<string, string>()
+    for (const c of contacts) {
+      const key = contactSourceKey(c)
+      if (!map.has(key)) map.set(key, contactSourceLabel(c, googleAccounts))
+    }
+    return [...map.entries()]
+      .sort(([a, la], [b, lb]) => (a === 'local' ? -1 : b === 'local' ? 1 : la.localeCompare(lb)))
+      .map(([key, label]) => ({ key, label }))
+  }, [contacts, googleAccounts])
+
+  async function handleExport() {
+    const path = await save({ defaultPath: 'kontakte.vcf', filters: [{ name: 'vCard', extensions: ['vcf'] }] })
+    if (!path) return
+    try {
+      const count = await api.exportContactsVcard(path)
+      onToast(`${count} Kontakte exportiert`)
+    } catch (e) {
+      onToast(`Export fehlgeschlagen: ${e}`)
+    }
+  }
+
+  async function handleImport() {
+    const path = await open({ multiple: false, filters: [{ name: 'vCard', extensions: ['vcf'] }] })
+    if (!path || Array.isArray(path)) return
+    try {
+      const count = await api.importContactsVcard(path)
+      onToast(`${count} Kontakte importiert`)
+      onRefresh()
+    } catch (e) {
+      onToast(`Import fehlgeschlagen: ${e}`)
+    }
+  }
+
+  const filtered = useMemo(() => {
+    let base = contacts
+    if (selectedGroup) {
+      const ids = new Set(selectedGroup.member_ids)
+      base = base.filter((c) => ids.has(c.id))
+    }
+    if (selectedSourceKey) {
+      base = base.filter((c) => contactSourceKey(c) === selectedSourceKey)
+    }
+    const q = query.trim().toLowerCase()
+    if (!q) return base
+    return base.filter(
+      (c) =>
+        c.name.toLowerCase().includes(q) ||
+        (c.email ?? '').toLowerCase().includes(q) ||
+        (c.phone ?? '').toLowerCase().includes(q) ||
+        (c.address ?? '').toLowerCase().includes(q) ||
+        (c.company ?? '').toLowerCase().includes(q),
+    )
+  }, [contacts, query, selectedGroup, selectedSourceKey])
+
+  const groupedBySource = useMemo(() => {
+    const map = new Map<string, Contact[]>()
+    for (const c of filtered) {
+      const key = contactSourceKey(c)
+      if (!map.has(key)) map.set(key, [])
+      map.get(key)!.push(c)
+    }
+    return sourceOptions.filter((o) => map.has(o.key)).map((o) => ({ ...o, items: map.get(o.key)! }))
+  }, [filtered, sourceOptions])
+
+  return (
+    <div className="flex min-w-0 flex-1 flex-col">
+      <div className="flex items-center gap-3 border-b border-zinc-200/80 px-7 py-4 dark:border-zinc-800/80">
+        <h1 className="text-[17px] font-semibold tracking-tight text-zinc-900 dark:text-zinc-50">
+          Kontakte
+        </h1>
+        <div className="flex flex-1 items-center gap-2 rounded-full border border-zinc-200 bg-zinc-50 px-3 py-1.5 dark:border-zinc-800 dark:bg-zinc-900">
+          <Search size={13} className="shrink-0 text-zinc-400" />
+          <input
+            value={query}
+            onChange={(e) => setQuery(e.target.value)}
+            placeholder="Kontakte durchsuchen…"
+            className="w-full bg-transparent text-[12.5px] text-zinc-700 outline-none placeholder:text-zinc-400 dark:text-zinc-200"
+          />
+        </div>
+        <button
+          onClick={onRefresh}
+          title="Kontakte aktualisieren"
+          disabled={loading}
+          className="shrink-0 rounded-full border border-zinc-200 p-2 text-zinc-500 shadow-sm transition hover:border-indigo-200 hover:bg-indigo-50 hover:text-indigo-700 disabled:opacity-50 dark:border-zinc-700 dark:text-zinc-400 dark:hover:border-indigo-800 dark:hover:bg-indigo-500/10"
+        >
+          <RefreshCw size={14} className={clsx(loading && 'animate-spin')} />
+        </button>
+        <button
+          onClick={handleExport}
+          title="Als vCard exportieren"
+          className="shrink-0 rounded-full border border-zinc-200 p-2 text-zinc-500 shadow-sm transition hover:border-indigo-200 hover:bg-indigo-50 hover:text-indigo-700 dark:border-zinc-700 dark:text-zinc-400 dark:hover:border-indigo-800 dark:hover:bg-indigo-500/10"
+        >
+          <Download size={14} />
+        </button>
+        <button
+          onClick={handleImport}
+          title="vCard importieren"
+          className="shrink-0 rounded-full border border-zinc-200 p-2 text-zinc-500 shadow-sm transition hover:border-indigo-200 hover:bg-indigo-50 hover:text-indigo-700 dark:border-zinc-700 dark:text-zinc-400 dark:hover:border-indigo-800 dark:hover:bg-indigo-500/10"
+        >
+          <Upload size={14} />
+        </button>
+        <GoogleContactsMenu accounts={googleAccounts} onSync={onSyncGoogleContacts} onReconnect={onReconnectGoogleAccount} />
+        <button
+          onClick={onManageGroups}
+          title="Gruppen verwalten"
+          className="shrink-0 rounded-full border border-zinc-200 p-2 text-zinc-500 shadow-sm transition hover:border-indigo-200 hover:bg-indigo-50 hover:text-indigo-700 dark:border-zinc-700 dark:text-zinc-400 dark:hover:border-indigo-800 dark:hover:bg-indigo-500/10"
+        >
+          <UsersRound size={14} />
+        </button>
+        <button
+          onClick={onAdd}
+          className="flex shrink-0 items-center gap-1.5 rounded-full bg-gradient-to-b from-indigo-500 to-indigo-600 px-4 py-2 text-[12.5px] font-medium text-white shadow-lg shadow-indigo-600/25 transition hover:from-indigo-400 hover:to-indigo-500 active:scale-[0.98]"
+        >
+          <Plus size={14} /> Kontakt
+        </button>
+      </div>
+
+      {groups.length > 0 && (
+        <div className="flex items-center gap-2 border-b border-zinc-200/80 px-7 py-2.5 dark:border-zinc-800/80">
+          <button
+            onClick={() => setSelectedGroupId(null)}
+            className={clsx(
+              'shrink-0 rounded-full px-3 py-1 text-[12px] font-medium transition',
+              !selectedGroup
+                ? 'bg-indigo-100 text-indigo-700 dark:bg-indigo-500/20 dark:text-indigo-300'
+                : 'bg-zinc-100 text-zinc-500 hover:bg-zinc-200 dark:bg-zinc-800 dark:text-zinc-400',
+            )}
+          >
+            Alle
+          </button>
+          {groups.map((g) => (
+            <button
+              key={g.id}
+              onClick={() => setSelectedGroupId(g.id === selectedGroupId ? null : g.id)}
+              className={clsx(
+                'shrink-0 rounded-full px-3 py-1 text-[12px] font-medium transition',
+                g.id === selectedGroupId
+                  ? 'bg-indigo-100 text-indigo-700 dark:bg-indigo-500/20 dark:text-indigo-300'
+                  : 'bg-zinc-100 text-zinc-500 hover:bg-zinc-200 dark:bg-zinc-800 dark:text-zinc-400',
+              )}
+            >
+              {g.name} ({g.member_ids.length})
+            </button>
+          ))}
+          {selectedGroup && selectedGroup.member_ids.length > 0 && (
+            <button
+              onClick={() => {
+                const emails = contacts
+                  .filter((c) => selectedGroup.member_ids.includes(c.id))
+                  .map((c) => c.email)
+                  .filter((e): e is string => !!e)
+                onComposeToEmails(emails)
+              }}
+              className="ml-auto flex shrink-0 items-center gap-1.5 rounded-full border border-indigo-200 px-3 py-1 text-[12px] font-medium text-indigo-700 transition hover:bg-indigo-50 dark:border-indigo-800 dark:text-indigo-300 dark:hover:bg-indigo-500/10"
+            >
+              <Mail size={12} /> Gruppe anschreiben
+            </button>
+          )}
+        </div>
+      )}
+
+      {sourceOptions.length > 1 && (
+        <div className="flex items-center gap-2 border-b border-zinc-200/80 px-7 py-2.5 dark:border-zinc-800/80">
+          <button
+            onClick={() => setSelectedSourceKey(null)}
+            className={clsx(
+              'shrink-0 rounded-full px-3 py-1 text-[12px] font-medium transition',
+              !selectedSourceKey
+                ? 'bg-indigo-100 text-indigo-700 dark:bg-indigo-500/20 dark:text-indigo-300'
+                : 'bg-zinc-100 text-zinc-500 hover:bg-zinc-200 dark:bg-zinc-800 dark:text-zinc-400',
+            )}
+          >
+            Alle Quellen
+          </button>
+          {sourceOptions.map((o) => (
+            <button
+              key={o.key}
+              onClick={() => setSelectedSourceKey(o.key === selectedSourceKey ? null : o.key)}
+              className={clsx(
+                'flex shrink-0 items-center gap-1 rounded-full px-3 py-1 text-[12px] font-medium transition',
+                o.key === selectedSourceKey
+                  ? 'bg-indigo-100 text-indigo-700 dark:bg-indigo-500/20 dark:text-indigo-300'
+                  : 'bg-zinc-100 text-zinc-500 hover:bg-zinc-200 dark:bg-zinc-800 dark:text-zinc-400',
+              )}
+            >
+              {o.key === 'local' ? <HardDrive size={11} /> : <Cloud size={11} />}
+              {o.label}
+            </button>
+          ))}
+        </div>
+      )}
+
+      <div className="flex-1 overflow-y-auto p-6">
+        {loading ? (
+          <div className="grid grid-cols-2 gap-3 xl:grid-cols-3">
+            {Array.from({ length: 6 }).map((_, i) => (
+              <div key={i} className="h-20 animate-pulse rounded-2xl bg-zinc-100 dark:bg-zinc-900" />
+            ))}
+          </div>
+        ) : filtered.length === 0 ? (
+          <div className="flex flex-col items-center justify-center gap-3 py-20 text-center">
+            <div className="flex h-16 w-16 items-center justify-center rounded-full bg-zinc-100 text-zinc-300 dark:bg-zinc-900 dark:text-zinc-700">
+              <UserRound size={26} strokeWidth={1.4} />
+            </div>
+            <p className="text-sm text-zinc-400">
+              {query ? 'Keine Treffer' : 'Noch keine Kontakte – sie werden auch automatisch aus deinen E-Mails übernommen'}
+            </p>
+          </div>
+        ) : (
+          <div className="flex flex-col gap-6">
+            {groupedBySource.map((group) => (
+              <div key={group.key}>
+                {!selectedSourceKey && (
+                  <div className="mb-2.5 flex items-center gap-1.5 text-[11px] font-semibold tracking-wide text-zinc-400 uppercase">
+                    {group.key === 'local' ? <HardDrive size={11} /> : <Cloud size={11} />}
+                    {group.label}
+                    <span className="font-normal normal-case text-zinc-300 dark:text-zinc-600">
+                      ({group.items.length})
+                    </span>
+                  </div>
+                )}
+                <div className="grid grid-cols-2 gap-3 xl:grid-cols-3">
+                  {group.items.map((c) => (
+                    <div
+                      key={c.id}
+                      onClick={() => onEdit(c)}
+                      onContextMenu={(e) => onContextMenu?.(e, c)}
+                      className="group flex cursor-default items-start gap-3 rounded-2xl border border-zinc-200/80 bg-white p-4 shadow-sm transition hover:border-indigo-200 hover:shadow-md dark:border-zinc-800 dark:bg-zinc-900 dark:hover:border-indigo-800"
+                    >
+                      <Avatar name={c.name || c.email || c.phone || '?'} size={40} />
+                      <div className="min-w-0 flex-1">
+                        <p className="truncate text-[13.5px] font-medium text-zinc-800 dark:text-zinc-100">
+                          {c.name || c.email || c.phone || c.address}
+                        </p>
+                        <p className="truncate text-[12px] text-zinc-400">{c.email ?? c.phone ?? c.address}</p>
+                        {c.company && <p className="truncate text-[11.5px] text-zinc-400">{c.company}</p>}
+                      </div>
+                      <div className="flex shrink-0 flex-col items-end gap-1.5">
+                        <button
+                          onClick={(e) => {
+                            e.stopPropagation()
+                            onToggleFavorite(c)
+                          }}
+                          className={clsx(
+                            'rounded-full p-1 transition',
+                            c.favorite
+                              ? 'text-amber-400'
+                              : 'text-zinc-300 opacity-0 group-hover:opacity-100 hover:text-amber-400 dark:text-zinc-700',
+                          )}
+                        >
+                          <Star size={14} fill={c.favorite ? 'currentColor' : 'none'} />
+                        </button>
+                        {c.email && (
+                          <button
+                            onClick={(e) => {
+                              e.stopPropagation()
+                              onCompose(c)
+                            }}
+                            title="Mail schreiben"
+                            className="rounded-full p-1 text-zinc-300 opacity-0 transition group-hover:opacity-100 hover:text-indigo-500 dark:text-zinc-700"
+                          >
+                            <Mail size={14} />
+                          </button>
+                        )}
+                      </div>
+                    </div>
+                  ))}
+                </div>
+              </div>
+            ))}
+          </div>
+        )}
+      </div>
+    </div>
+  )
+}
diff --git a/src/components/ContextMenu.tsx b/src/components/ContextMenu.tsx
new file mode 100644
index 0000000..e162435
--- /dev/null
+++ b/src/components/ContextMenu.tsx
@@ -0,0 +1,139 @@
+import { useEffect, useRef, useState } from 'react'
+import { createPortal } from 'react-dom'
+import { ChevronRight } from 'lucide-react'
+import clsx from 'clsx'
+
+export interface ContextMenuItem {
+  label: string
+  icon?: React.ReactNode
+  onClick?: () => void
+  danger?: boolean
+  disabled?: boolean
+  submenu?: ContextMenuItem[]
+}
+
+export type ContextMenuSection = ContextMenuItem[]
+
+export interface ContextMenuState {
+  x: number
+  y: number
+  sections: ContextMenuSection[]
+}
+
+/// Hook that owns {x,y,sections} state for a right-click menu. Call `openMenu`
+/// from an `onContextMenu` handler with the sections to show; render the
+/// returned state through <ContextMenu>.
+export function useContextMenu() {
+  const [menuState, setMenuState] = useState<ContextMenuState | null>(null)
+
+  function openMenu(e: React.MouseEvent, sections: ContextMenuSection[]) {
+    e.preventDefault()
+    e.stopPropagation()
+    setMenuState({ x: e.clientX, y: e.clientY, sections })
+  }
+
+  function closeMenu() {
+    setMenuState(null)
+  }
+
+  return { menuState, openMenu, closeMenu }
+}
+
+function MenuItemRow({ item, onDone }: { item: ContextMenuItem; onDone: () => void }) {
+  const itemClass = (danger?: boolean, disabled?: boolean) =>
+    clsx(
+      'flex w-full items-center gap-2.5 rounded-xl px-2.5 py-1.5 text-left text-[12.5px] transition',
+      disabled
+        ? 'cursor-default text-zinc-300 dark:text-zinc-700'
+        : danger
+          ? 'text-red-600 hover:bg-red-50 dark:text-red-400 dark:hover:bg-red-950/40'
+          : 'text-zinc-700 hover:bg-zinc-100 dark:text-zinc-200 dark:hover:bg-zinc-800',
+    )
+
+  if (item.submenu) {
+    return (
+      <div className="group/sub relative">
+        <button type="button" disabled={item.disabled} className={clsx(itemClass(item.danger, item.disabled), 'justify-between')}>
+          <span className="flex items-center gap-2.5">
+            {item.icon}
+            {item.label}
+          </span>
+          <ChevronRight size={12} className="shrink-0 text-zinc-400" />
+        </button>
+        {!item.disabled && item.submenu.length > 0 && (
+          <div className="invisible absolute left-full top-0 z-10 ml-1 w-56 overflow-hidden rounded-2xl border border-zinc-200/80 bg-white/95 p-1.5 opacity-0 shadow-xl backdrop-blur-xl transition-opacity group-hover/sub:visible group-hover/sub:opacity-100 dark:border-zinc-800 dark:bg-zinc-900/95">
+            {item.submenu.map((sub, i) => (
+              <MenuItemRow key={i} item={sub} onDone={onDone} />
+            ))}
+          </div>
+        )}
+      </div>
+    )
+  }
+
+  return (
+    <button
+      type="button"
+      disabled={item.disabled}
+      onClick={() => {
+        onDone()
+        item.onClick?.()
+      }}
+      className={itemClass(item.danger, item.disabled)}
+    >
+      {item.icon}
+      {item.label}
+    </button>
+  )
+}
+
+export function ContextMenu({ state, onClose }: { state: ContextMenuState | null; onClose: () => void }) {
+  const panelRef = useRef<HTMLDivElement>(null)
+
+  useEffect(() => {
+    if (!state) return
+    function onClickOutside(e: MouseEvent) {
+      if (panelRef.current?.contains(e.target as Node)) return
+      onClose()
+    }
+    function onKeyDown(e: KeyboardEvent) {
+      if (e.key === 'Escape') onClose()
+    }
+    document.addEventListener('mousedown', onClickOutside)
+    document.addEventListener('contextmenu', onClickOutside)
+    document.addEventListener('keydown', onKeyDown)
+    window.addEventListener('scroll', onClose, true)
+    window.addEventListener('blur', onClose)
+    return () => {
+      document.removeEventListener('mousedown', onClickOutside)
+      document.removeEventListener('contextmenu', onClickOutside)
+      document.removeEventListener('keydown', onKeyDown)
+      window.removeEventListener('scroll', onClose, true)
+      window.removeEventListener('blur', onClose)
+    }
+  }, [state, onClose])
+
+  if (!state) return null
+
+  const menuWidth = 224
+  const left = Math.min(state.x, window.innerWidth - menuWidth - 8)
+  const top = Math.min(state.y, window.innerHeight - 40)
+
+  return createPortal(
+    <div
+      ref={panelRef}
+      style={{ position: 'fixed', top, left, zIndex: 200, width: menuWidth }}
+      className="animate-panel-in overflow-hidden rounded-2xl border border-zinc-200/80 bg-white/95 p-1.5 shadow-xl backdrop-blur-xl dark:border-zinc-800 dark:bg-zinc-900/95"
+    >
+      {state.sections.map((section, si) => (
+        <div key={si}>
+          {si > 0 && <div className="my-1 h-px bg-zinc-200/80 dark:bg-zinc-800" />}
+          {section.map((item, ii) => (
+            <MenuItemRow key={ii} item={item} onDone={onClose} />
+          ))}
+        </div>
+      ))}
+    </div>,
+    document.body,
+  )
+}
diff --git a/src/components/EventModal.tsx b/src/components/EventModal.tsx
new file mode 100644
index 0000000..2fede50
--- /dev/null
+++ b/src/components/EventModal.tsx
@@ -0,0 +1,395 @@
+import { useEffect, useState } from 'react'
+import { Trash2, X } from 'lucide-react'
+import clsx from 'clsx'
+import type { Account, CaldavAccount, Event, NewEvent } from '../types'
+import { CATEGORY_COLORS } from '../lib/categories'
+
+type RecurrenceOption = 'none' | 'daily' | 'weekly' | 'monthly' | 'yearly'
+
+const FREQ_MAP: Record<Exclude<RecurrenceOption, 'none'>, string> = {
+  daily: 'DAILY',
+  weekly: 'WEEKLY',
+  monthly: 'MONTHLY',
+  yearly: 'YEARLY',
+}
+
+function parseRrule(rrule: string | null): { recurrence: RecurrenceOption; until: string } {
+  if (!rrule) return { recurrence: 'none', until: '' }
+  const freqMatch = /FREQ=([A-Z]+)/.exec(rrule)
+  const untilMatch = /UNTIL=(\d{8})/.exec(rrule)
+  const freq = freqMatch?.[1]
+  const recurrence = (Object.entries(FREQ_MAP).find(([, v]) => v === freq)?.[0] as RecurrenceOption) ?? 'none'
+  const until = untilMatch ? `${untilMatch[1].slice(0, 4)}-${untilMatch[1].slice(4, 6)}-${untilMatch[1].slice(6, 8)}` : ''
+  return { recurrence, until }
+}
+
+const REMINDER_OPTIONS: { value: string; label: string }[] = [
+  { value: '', label: 'Keine' },
+  { value: '10', label: '10 Minuten vorher' },
+  { value: '30', label: '30 Minuten vorher' },
+  { value: '60', label: '1 Stunde vorher' },
+  { value: '1440', label: '1 Tag vorher' },
+]
+
+function Field({ label, children }: { label: string; children: React.ReactNode }) {
+  return (
+    <label className="flex flex-col gap-1">
+      <span className="text-[11.5px] font-medium text-zinc-500 dark:text-zinc-400">{label}</span>
+      {children}
+    </label>
+  )
+}
+
+const inputClass =
+  'rounded-lg border border-zinc-200 bg-white px-3 py-1.5 text-[13px] text-zinc-800 outline-none transition focus:border-indigo-400 focus:ring-2 focus:ring-indigo-100 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-100 dark:focus:ring-indigo-500/20'
+
+function toDateStr(d: Date) {
+  const y = d.getFullYear()
+  const m = String(d.getMonth() + 1).padStart(2, '0')
+  const day = String(d.getDate()).padStart(2, '0')
+  return `${y}-${m}-${day}`
+}
+
+function toTimeStr(d: Date) {
+  const h = String(d.getHours()).padStart(2, '0')
+  const min = String(d.getMinutes()).padStart(2, '0')
+  return `${h}:${min}`
+}
+
+export function EventModal({
+  open,
+  event,
+  defaultDate,
+  googleAccounts,
+  caldavAccounts,
+  isOccurrenceEdit,
+  onClose,
+  onSave,
+  onDelete,
+}: {
+  open: boolean
+  event: Event | null
+  defaultDate: Date | null
+  googleAccounts: Account[]
+  caldavAccounts?: CaldavAccount[]
+  isOccurrenceEdit?: boolean
+  onClose: () => void
+  onSave: (data: NewEvent, existingId: string | null) => Promise<void>
+  onDelete: (event: Event) => Promise<void>
+}) {
+  const [title, setTitle] = useState('')
+  const [date, setDate] = useState('')
+  const [startTime, setStartTime] = useState('09:00')
+  const [endTime, setEndTime] = useState('10:00')
+  const [allDay, setAllDay] = useState(false)
+  const [location, setLocation] = useState('')
+  const [description, setDescription] = useState('')
+  const [calendarTarget, setCalendarTarget] = useState('')
+  const [recurrence, setRecurrence] = useState<RecurrenceOption>('none')
+  const [recurrenceUntil, setRecurrenceUntil] = useState('')
+  const [reminder, setReminder] = useState('')
+  const [category, setCategory] = useState<string | null>(null)
+  const [saving, setSaving] = useState(false)
+  const [deleting, setDeleting] = useState(false)
+  const [confirmDelete, setConfirmDelete] = useState(false)
+
+  useEffect(() => {
+    if (!open) return
+    setConfirmDelete(false)
+    if (event) {
+      const start = new Date(event.start_ts * 1000)
+      const end = new Date(event.end_ts * 1000)
+      const { recurrence: rec, until } = parseRrule(event.rrule)
+      setTitle(event.title)
+      setDate(toDateStr(start))
+      setStartTime(toTimeStr(start))
+      setEndTime(toTimeStr(end))
+      setAllDay(event.all_day)
+      setLocation(event.location ?? '')
+      setDescription(event.description ?? '')
+      setCalendarTarget(event.account_id ?? '')
+      setRecurrence(rec)
+      setRecurrenceUntil(until)
+      setReminder(event.reminder_minutes != null ? String(event.reminder_minutes) : '')
+      setCategory(event.category)
+    } else {
+      const base = defaultDate ?? new Date()
+      setTitle('')
+      setDate(toDateStr(base))
+      setStartTime('09:00')
+      setEndTime('10:00')
+      setAllDay(false)
+      setLocation('')
+      setDescription('')
+      setCalendarTarget('')
+      setRecurrence('none')
+      setRecurrenceUntil('')
+      setReminder('')
+      setCategory(null)
+    }
+  }, [open, event, defaultDate])
+
+  if (!open) return null
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault()
+    if (!title.trim() || !date) return
+    setSaving(true)
+    try {
+      let start_ts: number
+      let end_ts: number
+      if (allDay) {
+        start_ts = Math.floor(new Date(`${date}T00:00:00`).getTime() / 1000)
+        end_ts = start_ts + 86400
+      } else {
+        start_ts = Math.floor(new Date(`${date}T${startTime}:00`).getTime() / 1000)
+        end_ts = Math.floor(new Date(`${date}T${endTime}:00`).getTime() / 1000)
+        if (end_ts <= start_ts) end_ts = start_ts + 3600
+      }
+      let rrule: string | undefined
+      if (recurrence !== 'none') {
+        rrule = `FREQ=${FREQ_MAP[recurrence]}`
+        if (recurrenceUntil) rrule += `;UNTIL=${recurrenceUntil.replace(/-/g, '')}`
+      }
+      await onSave(
+        {
+          title: title.trim(),
+          location: location.trim() || undefined,
+          description: description.trim() || undefined,
+          start_ts,
+          end_ts,
+          all_day: allDay,
+          account_id: event ? undefined : calendarTarget || null,
+          rrule,
+          reminder_minutes: reminder ? Number(reminder) : undefined,
+          category,
+        },
+        event?.base_id ?? null,
+      )
+    } finally {
+      setSaving(false)
+    }
+  }
+
+  async function handleDelete() {
+    if (!event) return
+    setDeleting(true)
+    try {
+      await onDelete(event)
+    } finally {
+      setDeleting(false)
+    }
+  }
+
+  return (
+    <div className="animate-overlay-in fixed inset-0 z-50 flex items-center justify-center bg-zinc-900/40 p-6 backdrop-blur-sm dark:bg-black/60">
+      <form
+        onSubmit={handleSubmit}
+        className="animate-panel-in flex max-h-[85vh] w-full max-w-md flex-col overflow-hidden rounded-[28px] border border-white/70 bg-white/95 shadow-[0_24px_70px_-12px_rgba(15,15,25,0.35)] ring-1 ring-black/[0.03] backdrop-blur-2xl dark:border-white/10 dark:bg-zinc-900/90 dark:shadow-[0_24px_70px_-12px_rgba(0,0,0,0.6)]"
+      >
+        <div className="flex items-center justify-between border-b border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <h2 className="text-[15px] font-semibold tracking-tight text-zinc-800 dark:text-zinc-100">
+            {isOccurrenceEdit ? 'Diesen Termin bearbeiten' : event ? 'Termin bearbeiten' : 'Neuer Termin'}
+          </h2>
+          <button
+            type="button"
+            onClick={onClose}
+            className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+          >
+            <X size={16} />
+          </button>
+        </div>
+
+        <div className="flex-1 space-y-3.5 overflow-y-auto px-6 py-5">
+          {isOccurrenceEdit && (
+            <p className="rounded-lg bg-indigo-50 px-3 py-2 text-[11.5px] text-indigo-700 dark:bg-indigo-500/10 dark:text-indigo-300">
+              Änderungen gelten nur für diesen einen Termin, nicht für die ganze Serie.
+            </p>
+          )}
+          <Field label="Titel">
+            <input
+              className={inputClass}
+              value={title}
+              onChange={(e) => setTitle(e.target.value)}
+              placeholder="z. B. Teammeeting"
+              autoFocus
+              required
+            />
+          </Field>
+
+          <Field label="Datum">
+            <input className={inputClass} type="date" value={date} onChange={(e) => setDate(e.target.value)} required />
+          </Field>
+
+          <label className="flex items-center gap-2 text-[12px] text-zinc-500 dark:text-zinc-400">
+            <input
+              type="checkbox"
+              checked={allDay}
+              onChange={(e) => setAllDay(e.target.checked)}
+              className="rounded border-zinc-300"
+            />
+            Ganztägig
+          </label>
+
+          {!allDay && (
+            <div className="grid grid-cols-2 gap-3">
+              <Field label="Beginn">
+                <input className={inputClass} type="time" value={startTime} onChange={(e) => setStartTime(e.target.value)} />
+              </Field>
+              <Field label="Ende">
+                <input className={inputClass} type="time" value={endTime} onChange={(e) => setEndTime(e.target.value)} />
+              </Field>
+            </div>
+          )}
+
+          <Field label="Kalender">
+            <select
+              className={inputClass}
+              value={calendarTarget}
+              onChange={(e) => setCalendarTarget(e.target.value)}
+              disabled={!!event}
+            >
+              <option value="">Lokal (nur in dieser App)</option>
+              {googleAccounts.map((a) => (
+                <option key={a.id} value={a.id}>
+                  {a.label} (Google)
+                </option>
+              ))}
+              {(caldavAccounts ?? []).map((a) => (
+                <option key={a.id} value={a.id}>
+                  {a.label} (CalDAV)
+                </option>
+              ))}
+            </select>
+          </Field>
+
+          <div className="grid grid-cols-2 gap-3">
+            {!isOccurrenceEdit && (
+              <Field label="Wiederholung">
+                <select className={inputClass} value={recurrence} onChange={(e) => setRecurrence(e.target.value as RecurrenceOption)}>
+                  <option value="none">Keine</option>
+                  <option value="daily">Täglich</option>
+                  <option value="weekly">Wöchentlich</option>
+                  <option value="monthly">Monatlich</option>
+                  <option value="yearly">Jährlich</option>
+                </select>
+              </Field>
+            )}
+            <Field label="Erinnerung">
+              <select className={inputClass} value={reminder} onChange={(e) => setReminder(e.target.value)}>
+                {REMINDER_OPTIONS.map((o) => (
+                  <option key={o.value} value={o.value}>
+                    {o.label}
+                  </option>
+                ))}
+              </select>
+            </Field>
+          </div>
+
+          {!isOccurrenceEdit && recurrence !== 'none' && (
+            <Field label="Endet am (optional)">
+              <input
+                className={inputClass}
+                type="date"
+                value={recurrenceUntil}
+                onChange={(e) => setRecurrenceUntil(e.target.value)}
+              />
+            </Field>
+          )}
+
+          <Field label="Kategorie">
+            <div className="flex items-center gap-1.5">
+              {CATEGORY_COLORS.map((c) => (
+                <button
+                  key={c.id}
+                  type="button"
+                  title={c.label}
+                  onClick={() => setCategory(c.id === category ? null : c.id)}
+                  className={clsx('h-5 w-5 rounded-full transition', c.id === category && 'ring-2 ring-offset-1 ring-zinc-400')}
+                  style={{ backgroundColor: c.hex }}
+                />
+              ))}
+              <button
+                type="button"
+                title="Keine"
+                onClick={() => setCategory(null)}
+                className="flex h-5 w-5 items-center justify-center rounded-full border border-zinc-300 text-zinc-400 dark:border-zinc-600"
+              >
+                <X size={11} />
+              </button>
+            </div>
+          </Field>
+
+          {event?.rrule && (
+            <p className="rounded-lg bg-amber-50 px-3 py-2 text-[11.5px] text-amber-700 dark:bg-amber-500/10 dark:text-amber-400">
+              Teil einer Serie – Änderungen und Löschen gelten für die gesamte Serie.
+            </p>
+          )}
+
+          <Field label="Ort (optional)">
+            <input className={inputClass} value={location} onChange={(e) => setLocation(e.target.value)} />
+          </Field>
+
+          <Field label="Beschreibung (optional)">
+            <textarea
+              value={description}
+              onChange={(e) => setDescription(e.target.value)}
+              rows={3}
+              className="w-full resize-none rounded-lg border border-zinc-200 bg-white px-3 py-2 text-[12.5px] text-zinc-700 outline-none focus:border-indigo-400 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-200"
+            />
+          </Field>
+
+          {event && (
+            <div className="rounded-2xl border border-red-100 bg-red-50/50 p-3 dark:border-red-950/60 dark:bg-red-950/20">
+              {confirmDelete ? (
+                <div className="flex items-center gap-2">
+                  <span className="text-[12px] text-red-700 dark:text-red-400">Termin wirklich löschen?</span>
+                  <button
+                    type="button"
+                    onClick={handleDelete}
+                    disabled={deleting}
+                    className="ml-auto rounded-full bg-red-600 px-3 py-1 text-[11.5px] font-medium text-white transition hover:bg-red-500 disabled:opacity-60"
+                  >
+                    {deleting ? 'Lösche…' : 'Löschen'}
+                  </button>
+                  <button
+                    type="button"
+                    onClick={() => setConfirmDelete(false)}
+                    className="rounded-full px-3 py-1 text-[11.5px] font-medium text-zinc-500 hover:bg-zinc-100 dark:hover:bg-zinc-800"
+                  >
+                    Abbrechen
+                  </button>
+                </div>
+              ) : (
+                <button
+                  type="button"
+                  onClick={() => setConfirmDelete(true)}
+                  className="flex items-center gap-1.5 text-[12.5px] font-medium text-red-600 transition hover:text-red-700 dark:text-red-400"
+                >
+                  <Trash2 size={13} /> Termin löschen
+                </button>
+              )}
+            </div>
+          )}
+        </div>
+
+        <div className="flex justify-end gap-2 border-t border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <button
+            type="button"
+            onClick={onClose}
+            className="rounded-full px-4 py-2 text-[13px] font-medium text-zinc-500 transition hover:bg-zinc-100 dark:hover:bg-zinc-800"
+          >
+            Abbrechen
+          </button>
+          <button
+            type="submit"
+            disabled={saving}
+            className="rounded-full bg-gradient-to-b from-indigo-500 to-indigo-600 px-5 py-2 text-[13px] font-medium text-white shadow-lg shadow-indigo-600/25 transition hover:from-indigo-400 hover:to-indigo-500 hover:shadow-indigo-600/35 active:scale-[0.98] disabled:opacity-60"
+          >
+            {saving ? 'Speichere…' : 'Speichern'}
+          </button>
+        </div>
+      </form>
+    </div>
+  )
+}
diff --git a/src/components/GoogleCalendarMenu.tsx b/src/components/GoogleCalendarMenu.tsx
new file mode 100644
index 0000000..e6fb570
--- /dev/null
+++ b/src/components/GoogleCalendarMenu.tsx
@@ -0,0 +1,73 @@
+import { useState } from 'react'
+import { CalendarSync, Link2, RefreshCw } from 'lucide-react'
+import clsx from 'clsx'
+import type { Account } from '../types'
+import { RibbonButton } from './RibbonButton'
+import { Popover } from './Popover'
+
+export function GoogleCalendarMenu({
+  accounts,
+  onSync,
+  onReconnect,
+}: {
+  accounts: Account[]
+  onSync: (accountId: string) => Promise<void>
+  onReconnect: (accountId: string) => Promise<void>
+}) {
+  const [open, setOpen] = useState(false)
+  const [busy, setBusy] = useState<string | null>(null)
+
+  if (accounts.length === 0) return null
+
+  return (
+    <Popover
+      open={open}
+      onOpenChange={setOpen}
+      trigger={<RibbonButton icon={CalendarSync} label="Google-Konten" onClick={() => {}} />}
+      panelClassName="animate-panel-in w-72 overflow-hidden rounded-2xl border border-zinc-200/80 bg-white/95 p-2 shadow-xl backdrop-blur-xl dark:border-zinc-800 dark:bg-zinc-900/95"
+    >
+      <p className="px-2 py-1 text-[11px] font-semibold tracking-wide text-zinc-400 uppercase">Google Kalender</p>
+      {accounts.map((a) => (
+        <div key={a.id} className="flex items-center gap-1.5 rounded-xl px-2 py-1.5">
+          <span className="min-w-0 flex-1 truncate text-[12.5px] text-zinc-700 dark:text-zinc-300">{a.label}</span>
+          <button
+            type="button"
+            title="Verbinden / Zugriff erneuern"
+            disabled={busy === a.id}
+            onClick={async () => {
+              setBusy(a.id)
+              try {
+                await onReconnect(a.id)
+                await onSync(a.id)
+              } finally {
+                setBusy(null)
+              }
+            }}
+            className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 disabled:opacity-40 dark:hover:bg-zinc-800 dark:hover:text-zinc-300"
+          >
+            <Link2 size={13} />
+          </button>
+          <button
+            type="button"
+            title="Jetzt synchronisieren"
+            disabled={busy === a.id}
+            onClick={async () => {
+              setBusy(a.id)
+              try {
+                await onSync(a.id)
+              } finally {
+                setBusy(null)
+              }
+            }}
+            className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 disabled:opacity-40 dark:hover:bg-zinc-800 dark:hover:text-zinc-300"
+          >
+            <RefreshCw size={13} className={clsx(busy === a.id && 'animate-spin')} />
+          </button>
+        </div>
+      ))}
+      <p className="px-2 pt-1 text-[11px] text-zinc-400">
+        Neu hinzugefügte Google-Konten synchronisieren automatisch. Bereits vorhandene Konten brauchen einmalig „Verbinden“ (synchronisiert danach sofort mit), um Kalenderzugriff zu erlauben.
+      </p>
+    </Popover>
+  )
+}
diff --git a/src/components/GoogleContactsMenu.tsx b/src/components/GoogleContactsMenu.tsx
new file mode 100644
index 0000000..a922d5e
--- /dev/null
+++ b/src/components/GoogleContactsMenu.tsx
@@ -0,0 +1,81 @@
+import { useState } from 'react'
+import { Link2, RefreshCw, UserCog } from 'lucide-react'
+import clsx from 'clsx'
+import type { Account } from '../types'
+import { Popover } from './Popover'
+
+export function GoogleContactsMenu({
+  accounts,
+  onSync,
+  onReconnect,
+}: {
+  accounts: Account[]
+  onSync: (accountId: string) => Promise<void>
+  onReconnect: (accountId: string) => Promise<void>
+}) {
+  const [open, setOpen] = useState(false)
+  const [busy, setBusy] = useState<string | null>(null)
+
+  if (accounts.length === 0) return null
+
+  return (
+    <Popover
+      open={open}
+      onOpenChange={setOpen}
+      trigger={
+        <button
+          title="Google-Kontakte"
+          className="shrink-0 rounded-full border border-zinc-200 p-2 text-zinc-500 shadow-sm transition hover:border-indigo-200 hover:bg-indigo-50 hover:text-indigo-700 dark:border-zinc-700 dark:text-zinc-400 dark:hover:border-indigo-800 dark:hover:bg-indigo-500/10"
+        >
+          <UserCog size={14} />
+        </button>
+      }
+      align="end"
+      panelClassName="animate-panel-in w-72 overflow-hidden rounded-2xl border border-zinc-200/80 bg-white/95 p-2 shadow-xl backdrop-blur-xl dark:border-zinc-800 dark:bg-zinc-900/95"
+    >
+      <p className="px-2 py-1 text-[11px] font-semibold tracking-wide text-zinc-400 uppercase">Google Kontakte</p>
+      {accounts.map((a) => (
+        <div key={a.id} className="flex items-center gap-1.5 rounded-xl px-2 py-1.5">
+          <span className="min-w-0 flex-1 truncate text-[12.5px] text-zinc-700 dark:text-zinc-300">{a.label}</span>
+          <button
+            type="button"
+            title="Verbinden / Zugriff erneuern"
+            disabled={busy === a.id}
+            onClick={async () => {
+              setBusy(a.id)
+              try {
+                await onReconnect(a.id)
+                await onSync(a.id)
+              } finally {
+                setBusy(null)
+              }
+            }}
+            className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 disabled:opacity-40 dark:hover:bg-zinc-800 dark:hover:text-zinc-300"
+          >
+            <Link2 size={13} />
+          </button>
+          <button
+            type="button"
+            title="Jetzt synchronisieren"
+            disabled={busy === a.id}
+            onClick={async () => {
+              setBusy(a.id)
+              try {
+                await onSync(a.id)
+              } finally {
+                setBusy(null)
+              }
+            }}
+            className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 disabled:opacity-40 dark:hover:bg-zinc-800 dark:hover:text-zinc-300"
+          >
+            <RefreshCw size={13} className={clsx(busy === a.id && 'animate-spin')} />
+          </button>
+        </div>
+      ))}
+      <p className="px-2 pt-1 text-[11px] text-zinc-400">
+        Holt Kontakte aus Google (nur Import, kein Zurückschreiben). Bereits vorhandene Google-Konten brauchen
+        einmalig „Verbinden“ (synchronisiert danach sofort mit), um Kontaktzugriff zu erlauben.
+      </p>
+    </Popover>
+  )
+}
diff --git a/src/components/ImportModal.tsx b/src/components/ImportModal.tsx
new file mode 100644
index 0000000..88b13fb
--- /dev/null
+++ b/src/components/ImportModal.tsx
@@ -0,0 +1,174 @@
+import { useEffect, useState } from 'react'
+import { open } from '@tauri-apps/plugin-dialog'
+import { HardDrive, Inbox, Upload, X } from 'lucide-react'
+import type { Account, Folder } from '../types'
+import { api } from '../lib/api'
+
+const inputClass =
+  'rounded-lg border border-zinc-200 bg-white px-3 py-1.5 text-[13px] text-zinc-800 outline-none transition focus:border-indigo-400 focus:ring-2 focus:ring-indigo-100 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-100 dark:focus:ring-indigo-500/20'
+
+export function ImportModal({
+  open: isOpen,
+  accounts,
+  onClose,
+  onImported,
+}: {
+  open: boolean
+  accounts: Account[]
+  onClose: () => void
+  onImported: (accountId: string, folder: string) => void
+}) {
+  const targets = accounts.filter((a) => a.protocol === 'local' || a.protocol === 'imap')
+  const [accountId, setAccountId] = useState('')
+  const [folders, setFolders] = useState<Folder[]>([])
+  const [folder, setFolder] = useState('')
+  const [loadingFolders, setLoadingFolders] = useState(false)
+  const [importing, setImporting] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+
+  useEffect(() => {
+    if (isOpen) {
+      const first = targets[0]?.id ?? ''
+      setAccountId(first)
+      setError(null)
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [isOpen])
+
+  useEffect(() => {
+    if (!accountId) return
+    const account = accounts.find((a) => a.id === accountId)
+    if (!account) return
+    if (account.protocol === 'local') {
+      setFolders([{ name: 'Importiert', display_name: 'Importiert', unread: 0 }])
+      setFolder('Importiert')
+      return
+    }
+    setLoadingFolders(true)
+    api
+      .listFolders(accountId)
+      .then((f) => {
+        setFolders(f)
+        setFolder(f[0]?.name ?? '')
+      })
+      .catch((e) => setError(String(e)))
+      .finally(() => setLoadingFolders(false))
+  }, [accountId, accounts])
+
+  if (!isOpen) return null
+
+  async function handlePickAndImport() {
+    if (!accountId || !folder) return
+    setError(null)
+    const path = await open({
+      multiple: false,
+      filters: [{ name: 'E-Mail', extensions: ['eml', 'mbox', 'mbx'] }],
+    })
+    if (!path || Array.isArray(path)) return
+
+    setImporting(true)
+    try {
+      if (path.toLowerCase().endsWith('.eml')) {
+        await api.importEmlFile(accountId, folder, path)
+      } else {
+        await api.importMboxFile(accountId, folder, path)
+      }
+      onImported(accountId, folder)
+      onClose()
+    } catch (e) {
+      setError(String(e))
+    } finally {
+      setImporting(false)
+    }
+  }
+
+  return (
+    <div className="animate-overlay-in fixed inset-0 z-50 flex items-center justify-center bg-zinc-900/40 p-6 backdrop-blur-sm dark:bg-black/60">
+      <div className="animate-panel-in flex w-full max-w-sm flex-col overflow-hidden rounded-[28px] border border-white/70 bg-white/95 shadow-[0_24px_70px_-12px_rgba(15,15,25,0.35)] ring-1 ring-black/[0.03] backdrop-blur-2xl dark:border-white/10 dark:bg-zinc-900/90 dark:shadow-[0_24px_70px_-12px_rgba(0,0,0,0.6)]">
+        <div className="flex items-center justify-between border-b border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <h2 className="text-[15px] font-semibold tracking-tight text-zinc-800 dark:text-zinc-100">
+            Mail importieren
+          </h2>
+          <button
+            onClick={onClose}
+            className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+          >
+            <X size={16} />
+          </button>
+        </div>
+
+        <div className="space-y-3.5 px-6 py-5">
+          <p className="text-[12.5px] text-zinc-500 dark:text-zinc-400">
+            Unterstützt .eml (einzelne Nachricht) und .mbox (mehrere Nachrichten). Wähle zuerst, wohin importiert
+            werden soll.
+          </p>
+
+          <label className="flex flex-col gap-1">
+            <span className="text-[11.5px] font-medium text-zinc-500 dark:text-zinc-400">Ziel</span>
+            <select className={inputClass} value={accountId} onChange={(e) => setAccountId(e.target.value)}>
+              {targets.map((a) => (
+                <option key={a.id} value={a.id}>
+                  {a.protocol === 'local' ? 'Lokal (nur in dieser App)' : `${a.label} (${a.email})`}
+                </option>
+              ))}
+            </select>
+          </label>
+
+          {accounts.find((a) => a.id === accountId)?.protocol === 'imap' && (
+            <label className="flex flex-col gap-1">
+              <span className="text-[11.5px] font-medium text-zinc-500 dark:text-zinc-400">Zielordner</span>
+              <select
+                className={inputClass}
+                value={folder}
+                onChange={(e) => setFolder(e.target.value)}
+                disabled={loadingFolders}
+              >
+                {folders.map((f) => (
+                  <option key={f.name} value={f.name}>
+                    {f.display_name}
+                  </option>
+                ))}
+              </select>
+            </label>
+          )}
+
+          {accounts.find((a) => a.id === accountId)?.protocol === 'local' && (
+            <div className="flex items-center gap-2 rounded-lg bg-zinc-50 px-3 py-2 text-[12px] text-zinc-500 dark:bg-zinc-800/60 dark:text-zinc-400">
+              <HardDrive size={13} className="shrink-0" />
+              Nachrichten werden nur lokal gespeichert, nicht auf einen Server hochgeladen.
+            </div>
+          )}
+          {accounts.find((a) => a.id === accountId)?.protocol === 'imap' && (
+            <div className="flex items-center gap-2 rounded-lg bg-zinc-50 px-3 py-2 text-[12px] text-zinc-500 dark:bg-zinc-800/60 dark:text-zinc-400">
+              <Inbox size={13} className="shrink-0" />
+              Nachrichten werden per IMAP wirklich in dieses Postfach hochgeladen.
+            </div>
+          )}
+
+          {error && (
+            <p className="rounded-lg bg-red-50 px-3 py-2 text-[12px] text-red-600 dark:bg-red-950/40 dark:text-red-400">
+              {error}
+            </p>
+          )}
+        </div>
+
+        <div className="flex justify-end gap-2 border-t border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <button
+            onClick={onClose}
+            className="rounded-full px-4 py-2 text-[13px] font-medium text-zinc-500 transition hover:bg-zinc-100 dark:hover:bg-zinc-800"
+          >
+            Abbrechen
+          </button>
+          <button
+            onClick={handlePickAndImport}
+            disabled={importing || !accountId || !folder}
+            className="flex items-center gap-2 rounded-full bg-gradient-to-b from-indigo-500 to-indigo-600 px-4 py-2 text-[13px] font-medium text-white shadow-lg shadow-indigo-600/25 transition hover:from-indigo-400 hover:to-indigo-500 active:scale-[0.98] disabled:opacity-60"
+          >
+            <Upload size={14} />
+            {importing ? 'Importiere…' : 'Datei wählen…'}
+          </button>
+        </div>
+      </div>
+    </div>
+  )
+}
diff --git a/src/components/MessageList.tsx b/src/components/MessageList.tsx
new file mode 100644
index 0000000..04eaafd
--- /dev/null
+++ b/src/components/MessageList.tsx
@@ -0,0 +1,414 @@
+import { useMemo, useRef, useState } from 'react'
+import { isToday, isYesterday } from 'date-fns'
+import clsx from 'clsx'
+import { Inbox, Paperclip, Search, SlidersHorizontal, Star, X } from 'lucide-react'
+import type { Account, AdvancedSearchFilters, MessageSummary } from '../types'
+import type { SortBy } from './Ribbon'
+import { Avatar } from './Avatar'
+import { Popover } from './Popover'
+import { formatListDate } from '../lib/format'
+import { CATEGORY_COLORS, categoryHex } from '../lib/categories'
+
+type ThreadRow = MessageSummary & { threadCount: number }
+
+function sortRows<T extends MessageSummary>(rows: T[], sortBy: SortBy, desc: boolean): T[] {
+  const sorted = [...rows].sort((a, b) => {
+    let cmp: number
+    if (sortBy === 'date') cmp = a.timestamp - b.timestamp
+    else if (sortBy === 'from') cmp = (a.from_name || a.from_addr).localeCompare(b.from_name || b.from_addr)
+    else cmp = a.subject.localeCompare(b.subject)
+    return desc ? -cmp : cmp
+  })
+  return sorted
+}
+
+function keyOf(m: MessageSummary) {
+  return `${m.account_id}-${m.folder}-${m.uid}`
+}
+
+/// Groups by thread_id (root of the References chain, or the message's own id
+/// when it has no parent) — real header-based threading, not a subject guess.
+function groupConversationsFn(messages: MessageSummary[]): ThreadRow[] {
+  const map = new Map<string, MessageSummary[]>()
+  for (const m of messages) {
+    const key = m.thread_id || `__${m.folder}_${m.uid}`
+    const list = map.get(key)
+    if (list) list.push(m)
+    else map.set(key, [m])
+  }
+  const rows: ThreadRow[] = []
+  for (const list of map.values()) {
+    const latest = list.reduce((a, b) => (b.timestamp > a.timestamp ? b : a))
+    const anyUnread = list.some((x) => !x.is_read)
+    rows.push({ ...latest, is_read: !anyUnread, threadCount: list.length })
+  }
+  rows.sort((a, b) => b.timestamp - a.timestamp)
+  return rows
+}
+
+function CategoryDot({
+  category,
+  onChange,
+}: {
+  category: string | null
+  onChange: (category: string | null) => void
+}) {
+  const [open, setOpen] = useState(false)
+  const hex = categoryHex(category)
+
+  return (
+    <Popover
+      open={open}
+      onOpenChange={setOpen}
+      align="end"
+      trigger={
+        <button
+          title="Kategorie"
+          className={clsx(
+            'flex h-3.5 w-3.5 shrink-0 items-center justify-center rounded-full border transition',
+            hex ? 'border-transparent' : 'border-zinc-300 opacity-0 group-hover:opacity-100 dark:border-zinc-600',
+          )}
+          style={hex ? { backgroundColor: hex } : undefined}
+        />
+      }
+      panelClassName="animate-panel-in flex items-center gap-1 rounded-full border border-zinc-200/80 bg-white/95 p-1.5 shadow-xl backdrop-blur-xl dark:border-zinc-800 dark:bg-zinc-900/95"
+    >
+      {CATEGORY_COLORS.map((c) => (
+        <button
+          key={c.id}
+          title={c.label}
+          onClick={() => {
+            onChange(c.id === category ? null : c.id)
+            setOpen(false)
+          }}
+          className={clsx('h-4 w-4 rounded-full transition', c.id === category && 'ring-2 ring-offset-1 ring-zinc-400')}
+          style={{ backgroundColor: c.hex }}
+        />
+      ))}
+      <button
+        title="Keine"
+        onClick={() => {
+          onChange(null)
+          setOpen(false)
+        }}
+        className="ml-0.5 flex h-4 w-4 items-center justify-center rounded-full border border-zinc-300 text-zinc-400 dark:border-zinc-600"
+      >
+        <X size={9} />
+      </button>
+    </Popover>
+  )
+}
+
+function groupByDate(messages: ThreadRow[]) {
+  const groups: { label: string; items: ThreadRow[] }[] = []
+  for (const m of messages) {
+    const date = new Date(m.timestamp * 1000)
+    const label = !m.timestamp ? 'Unbekannt' : isToday(date) ? 'Heute' : isYesterday(date) ? 'Gestern' : 'Älter'
+    const last = groups[groups.length - 1]
+    if (last && last.label === label) {
+      last.items.push(m)
+    } else {
+      groups.push({ label, items: [m] })
+    }
+  }
+  return groups
+}
+
+export function MessageList({
+  messages,
+  selectedKeys,
+  onRowClick,
+  onToggleFlag,
+  onSetCategory,
+  onContextMenu,
+  onDragStartMessage,
+  loading,
+  searchQuery,
+  onSearchChange,
+  advancedSearch,
+  onAdvancedSearchChange,
+  compact,
+  groupConversations,
+  accounts,
+  sortBy,
+  sortDesc,
+  forceAccountBadge,
+}: {
+  messages: MessageSummary[]
+  selectedKeys: Set<string>
+  onRowClick: (m: MessageSummary, index: number, e: React.MouseEvent) => void
+  onToggleFlag: (m: MessageSummary) => void
+  onSetCategory: (m: MessageSummary, category: string | null) => void
+  onContextMenu?: (e: React.MouseEvent, m: MessageSummary, index: number) => void
+  onDragStartMessage?: (m: MessageSummary, index: number) => void
+  loading: boolean
+  searchQuery: string
+  onSearchChange: (q: string) => void
+  advancedSearch: AdvancedSearchFilters
+  onAdvancedSearchChange: (f: AdvancedSearchFilters) => void
+  compact: boolean
+  groupConversations: boolean
+  accounts: Account[]
+  sortBy: SortBy
+  sortDesc: boolean
+  forceAccountBadge?: boolean
+}) {
+  const containerRef = useRef<HTMLDivElement>(null)
+  const [advancedOpen, setAdvancedOpen] = useState(false)
+  const accountLabels = useMemo(() => new Map(accounts.map((a) => [a.id, a.label])), [accounts])
+  const showAccountBadge = forceAccountBadge || searchQuery.trim().length > 0
+  const rows = useMemo(() => {
+    const base = groupConversations ? groupConversationsFn(messages) : messages.map((m) => ({ ...m, threadCount: 1 }))
+    return sortRows(base, sortBy, sortDesc)
+  }, [messages, groupConversations, sortBy, sortDesc])
+  const groups = useMemo(
+    () => (sortBy === 'date' ? groupByDate(rows) : [{ label: '', items: rows }]),
+    [rows, sortBy],
+  )
+
+  function handleKeyDown(e: React.KeyboardEvent) {
+    if (rows.length === 0) return
+    const currentIndex = selectedKeys.size === 1 ? rows.findIndex((m) => selectedKeys.has(keyOf(m))) : -1
+
+    if (e.key === 'ArrowDown') {
+      e.preventDefault()
+      const idx = Math.min(currentIndex + 1, rows.length - 1)
+      onRowClick(rows[idx] ?? rows[0], idx, e as unknown as React.MouseEvent)
+    } else if (e.key === 'ArrowUp') {
+      e.preventDefault()
+      const idx = Math.max(currentIndex - 1, 0)
+      onRowClick(rows[idx] ?? rows[0], idx, e as unknown as React.MouseEvent)
+    } else if (e.key === 'Enter' && currentIndex === -1 && rows[0]) {
+      onRowClick(rows[0], 0, e as unknown as React.MouseEvent)
+    }
+  }
+
+  let runningIndex = -1
+  const hasAdvancedFilters = !!(
+    advancedSearch.from.trim() ||
+    advancedSearch.dateFrom ||
+    advancedSearch.dateTo ||
+    advancedSearch.hasAttachment
+  )
+
+  return (
+    <div className="flex w-96 shrink-0 flex-col border-r border-zinc-200 dark:border-zinc-800">
+      <div className="flex items-center gap-2 border-b border-zinc-200/80 px-3.5 py-2.5 dark:border-zinc-800/80">
+        <Search size={14} className="shrink-0 text-zinc-400" />
+        <input
+          value={searchQuery}
+          onChange={(e) => onSearchChange(e.target.value)}
+          placeholder="Suchen…"
+          className="flex-1 bg-transparent text-[12.5px] text-zinc-700 outline-none placeholder:text-zinc-400 dark:text-zinc-200"
+        />
+        {searchQuery && (
+          <button
+            onClick={() => onSearchChange('')}
+            className="rounded-full p-0.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+          >
+            <X size={13} />
+          </button>
+        )}
+        <Popover
+          open={advancedOpen}
+          onOpenChange={setAdvancedOpen}
+          align="end"
+          trigger={
+            <button
+              title="Erweiterte Suche"
+              className={clsx(
+                'relative rounded-full p-1 transition',
+                hasAdvancedFilters
+                  ? 'text-indigo-600 dark:text-indigo-400'
+                  : 'text-zinc-400 hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800',
+              )}
+            >
+              <SlidersHorizontal size={13} />
+              {hasAdvancedFilters && (
+                <span className="absolute -top-0.5 -right-0.5 h-1.5 w-1.5 rounded-full bg-indigo-500" />
+              )}
+            </button>
+          }
+          panelClassName="animate-panel-in w-64 space-y-2.5 rounded-2xl border border-zinc-200/80 bg-white/95 p-3.5 shadow-xl backdrop-blur-xl dark:border-zinc-800 dark:bg-zinc-900/95"
+        >
+          <p className="text-[11px] font-semibold tracking-wide text-zinc-400 uppercase">Erweiterte Suche</p>
+          <label className="flex flex-col gap-1">
+            <span className="text-[11px] text-zinc-500 dark:text-zinc-400">Absender</span>
+            <input
+              value={advancedSearch.from}
+              onChange={(e) => onAdvancedSearchChange({ ...advancedSearch, from: e.target.value })}
+              placeholder="name@example.com"
+              className="rounded-lg border border-zinc-200 bg-white px-2.5 py-1 text-[12px] text-zinc-800 outline-none focus:border-indigo-400 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-100"
+            />
+          </label>
+          <div className="flex gap-2">
+            <label className="flex flex-1 flex-col gap-1">
+              <span className="text-[11px] text-zinc-500 dark:text-zinc-400">Von</span>
+              <input
+                type="date"
+                value={advancedSearch.dateFrom}
+                onChange={(e) => onAdvancedSearchChange({ ...advancedSearch, dateFrom: e.target.value })}
+                className="rounded-lg border border-zinc-200 bg-white px-2 py-1 text-[12px] text-zinc-800 outline-none focus:border-indigo-400 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-100"
+              />
+            </label>
+            <label className="flex flex-1 flex-col gap-1">
+              <span className="text-[11px] text-zinc-500 dark:text-zinc-400">Bis</span>
+              <input
+                type="date"
+                value={advancedSearch.dateTo}
+                onChange={(e) => onAdvancedSearchChange({ ...advancedSearch, dateTo: e.target.value })}
+                className="rounded-lg border border-zinc-200 bg-white px-2 py-1 text-[12px] text-zinc-800 outline-none focus:border-indigo-400 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-100"
+              />
+            </label>
+          </div>
+          <label className="flex items-center gap-2 text-[12px] text-zinc-600 dark:text-zinc-300">
+            <input
+              type="checkbox"
+              checked={advancedSearch.hasAttachment}
+              onChange={(e) => onAdvancedSearchChange({ ...advancedSearch, hasAttachment: e.target.checked })}
+              className="rounded border-zinc-300"
+            />
+            Nur mit Anhang
+          </label>
+          {hasAdvancedFilters && (
+            <button
+              onClick={() => onAdvancedSearchChange({ from: '', dateFrom: '', dateTo: '', hasAttachment: false })}
+              className="text-[11.5px] font-medium text-indigo-600 transition hover:text-indigo-700 dark:text-indigo-400"
+            >
+              Filter zurücksetzen
+            </button>
+          )}
+        </Popover>
+      </div>
+
+      {loading && rows.length === 0 ? (
+        <div className="flex flex-col gap-2 p-3">
+          {Array.from({ length: 8 }).map((_, i) => (
+            <div key={i} className="h-16 animate-pulse rounded-xl bg-zinc-100 dark:bg-zinc-900" />
+          ))}
+        </div>
+      ) : rows.length === 0 ? (
+        <div className="flex flex-1 flex-col items-center justify-center gap-2 p-8 text-center">
+          <Inbox size={28} className="text-zinc-300 dark:text-zinc-700" />
+          <p className="text-sm text-zinc-400">
+            {searchQuery ? 'Keine Treffer' : 'Keine Nachrichten in diesem Ordner'}
+          </p>
+        </div>
+      ) : (
+        <div
+          ref={containerRef}
+          tabIndex={0}
+          onKeyDown={handleKeyDown}
+          className="flex-1 overflow-y-auto outline-none"
+        >
+          {groups.map((group) => (
+            <div key={group.label || 'flat'}>
+              {group.label && (
+                <p className="sticky top-0 z-10 bg-zinc-50/90 px-4 py-1.5 text-[10.5px] font-semibold tracking-wide text-zinc-400 uppercase backdrop-blur dark:bg-zinc-950/90">
+                  {group.label}
+                </p>
+              )}
+              {group.items.map((m) => {
+                runningIndex += 1
+                const index = runningIndex
+                const active = selectedKeys.has(keyOf(m))
+                return (
+                  <div
+                    key={keyOf(m)}
+                    role="button"
+                    tabIndex={-1}
+                    onClick={(e) => onRowClick(m, index, e)}
+                    onContextMenu={(e) => onContextMenu?.(e, m, index)}
+                    draggable
+                    onDragStart={(e) => {
+                      e.dataTransfer.effectAllowed = 'move'
+                      onDragStartMessage?.(m, index)
+                    }}
+                    className={clsx(
+                      'group relative flex w-full cursor-default items-start gap-3 border-b border-zinc-100 px-4 text-left transition dark:border-zinc-900',
+                      compact ? 'py-1.5' : 'py-3',
+                      active
+                        ? 'bg-indigo-50/80 dark:bg-indigo-500/10'
+                        : 'hover:bg-zinc-50 dark:hover:bg-zinc-900/60',
+                    )}
+                  >
+                    {active && (
+                      <span className="absolute inset-y-2 left-0 w-[3px] rounded-r-full bg-indigo-500" />
+                    )}
+                    <Avatar name={m.from_name || m.from_addr} size={compact ? 26 : 34} />
+                    <div className="min-w-0 flex-1">
+                      <div className="flex items-center justify-between gap-2">
+                        <span
+                          className={clsx(
+                            'truncate text-[13px]',
+                            !m.is_read
+                              ? 'font-semibold text-zinc-900 dark:text-zinc-50'
+                              : 'font-medium text-zinc-600 dark:text-zinc-400',
+                          )}
+                        >
+                          {m.from_name || m.from_addr}
+                        </span>
+                        <span className="shrink-0 text-[11px] text-zinc-400">
+                          {formatListDate(m.timestamp)}
+                        </span>
+                      </div>
+                      <div className="mt-0.5 flex items-center gap-1.5">
+                        {!m.is_read && (
+                          <span className="h-1.5 w-1.5 shrink-0 rounded-full bg-indigo-500" />
+                        )}
+                        <span
+                          className={clsx(
+                            'truncate text-[12.5px]',
+                            !m.is_read
+                              ? 'font-medium text-zinc-800 dark:text-zinc-200'
+                              : 'text-zinc-500 dark:text-zinc-500',
+                          )}
+                        >
+                          {m.subject || '(kein Betreff)'}
+                        </span>
+                        {m.threadCount > 1 && (
+                          <span className="shrink-0 rounded-full bg-zinc-100 px-1.5 py-0.5 text-[10px] font-semibold text-zinc-500 tabular-nums dark:bg-zinc-800 dark:text-zinc-400">
+                            {m.threadCount}
+                          </span>
+                        )}
+                        {m.has_attachments && (
+                          <Paperclip size={11} className="shrink-0 text-zinc-400" />
+                        )}
+                        {showAccountBadge && (
+                          <span className="shrink-0 truncate rounded-full bg-zinc-100 px-1.5 py-0.5 text-[10px] font-medium text-zinc-500 dark:bg-zinc-800 dark:text-zinc-400">
+                            {accountLabels.get(m.account_id) ?? m.account_id}
+                          </span>
+                        )}
+                      </div>
+                      {!compact && m.snippet && (
+                        <p className="mt-0.5 truncate text-[12px] text-zinc-400">{m.snippet}</p>
+                      )}
+                    </div>
+                    <div className="flex shrink-0 flex-col items-end gap-1">
+                      <button
+                        onClick={(e) => {
+                          e.stopPropagation()
+                          onToggleFlag(m)
+                        }}
+                        title={m.flagged ? 'Markierung entfernen' : 'Markieren'}
+                        className={clsx(
+                          'rounded-full p-1 transition',
+                          m.flagged
+                            ? 'text-amber-400'
+                            : 'text-zinc-300 opacity-0 group-hover:opacity-100 hover:text-amber-400 dark:text-zinc-700',
+                        )}
+                      >
+                        <Star size={14} fill={m.flagged ? 'currentColor' : 'none'} />
+                      </button>
+                      <CategoryDot category={m.category} onChange={(c) => onSetCategory(m, c)} />
+                    </div>
+                  </div>
+                )
+              })}
+            </div>
+          ))}
+        </div>
+      )}
+    </div>
+  )
+}
diff --git a/src/components/NewMailPopup.tsx b/src/components/NewMailPopup.tsx
new file mode 100644
index 0000000..4d462bd
--- /dev/null
+++ b/src/components/NewMailPopup.tsx
@@ -0,0 +1,53 @@
+import { useEffect } from 'react'
+import { Mail, X } from 'lucide-react'
+
+export interface NewMailNotification {
+  accountId: string
+  accountLabel: string
+  folder: string
+}
+
+const AUTO_DISMISS_MS = 6000
+
+export function NewMailPopup({
+  notification,
+  onOpen,
+  onDismiss,
+}: {
+  notification: NewMailNotification | null
+  onOpen: () => void
+  onDismiss: () => void
+}) {
+  useEffect(() => {
+    if (!notification) return
+    const t = setTimeout(onDismiss, AUTO_DISMISS_MS)
+    return () => clearTimeout(t)
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [notification])
+
+  if (!notification) return null
+
+  return (
+    <div className="animate-toast-in fixed right-6 top-6 z-50 w-80 overflow-hidden rounded-2xl border border-zinc-200/80 bg-white/95 shadow-[0_24px_70px_-12px_rgba(15,15,25,0.35)] backdrop-blur-2xl dark:border-zinc-800 dark:bg-zinc-900/95 relative">
+      <button
+        onClick={onOpen}
+        className="flex w-full items-start gap-3 px-4 py-3.5 text-left transition hover:bg-zinc-50 dark:hover:bg-zinc-800/60"
+      >
+        <div className="flex h-9 w-9 shrink-0 items-center justify-center rounded-full bg-indigo-50 text-indigo-500 dark:bg-indigo-500/15 dark:text-indigo-300">
+          <Mail size={16} />
+        </div>
+        <div className="min-w-0 flex-1">
+          <p className="text-[13px] font-semibold text-zinc-800 dark:text-zinc-100">Neue E-Mail</p>
+          <p className="truncate text-[12px] text-zinc-500 dark:text-zinc-400">{notification.accountLabel}</p>
+        </div>
+      </button>
+      <button
+        onClick={onDismiss}
+        title="Schließen"
+        className="absolute right-2 top-2 rounded-full p-1 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+      >
+        <X size={13} />
+      </button>
+    </div>
+  )
+}
diff --git a/src/components/Popover.tsx b/src/components/Popover.tsx
new file mode 100644
index 0000000..76ed733
--- /dev/null
+++ b/src/components/Popover.tsx
@@ -0,0 +1,96 @@
+import { useEffect, useLayoutEffect, useRef, useState } from 'react'
+import { createPortal } from 'react-dom'
+
+interface Pos {
+  top?: number
+  bottom?: number
+  left?: number
+  right?: number
+}
+
+/// Trigger + panel pair where the panel is portaled to document.body and
+/// positioned via a fixed-position rect computed from the trigger element.
+/// Needed because several triggers live inside scrollable/overflow-clipped
+/// containers (ribbon body, message list, sidebar) — a plain `absolute`
+/// child would get clipped by that ancestor instead of floating above it.
+export function Popover({
+  open,
+  onOpenChange,
+  trigger,
+  children,
+  align = 'start',
+  side = 'bottom',
+  panelClassName,
+}: {
+  open: boolean
+  onOpenChange: (v: boolean) => void
+  trigger: React.ReactNode
+  children: React.ReactNode
+  align?: 'start' | 'end'
+  side?: 'bottom' | 'top'
+  panelClassName?: string
+}) {
+  const triggerRef = useRef<HTMLDivElement>(null)
+  const panelRef = useRef<HTMLDivElement>(null)
+  const [pos, setPos] = useState<Pos | null>(null)
+
+  function computePos() {
+    if (!triggerRef.current) return
+    const rect = triggerRef.current.getBoundingClientRect()
+    const next: Pos = {}
+    if (side === 'bottom') next.top = rect.bottom + 4
+    else next.bottom = window.innerHeight - rect.top + 4
+    if (align === 'start') next.left = rect.left
+    else next.right = window.innerWidth - rect.right
+    setPos(next)
+  }
+
+  useLayoutEffect(() => {
+    if (open) computePos()
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [open, align, side])
+
+  useEffect(() => {
+    if (!open) return
+    function onClickOutside(e: MouseEvent) {
+      const target = e.target as Node
+      if (triggerRef.current?.contains(target)) return
+      if (panelRef.current?.contains(target)) return
+      onOpenChange(false)
+    }
+    function onReposition() {
+      computePos()
+    }
+    document.addEventListener('mousedown', onClickOutside)
+    window.addEventListener('scroll', onReposition, true)
+    window.addEventListener('resize', onReposition)
+    return () => {
+      document.removeEventListener('mousedown', onClickOutside)
+      window.removeEventListener('scroll', onReposition, true)
+      window.removeEventListener('resize', onReposition)
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [open])
+
+  return (
+    <>
+      <div
+        ref={triggerRef}
+        onClick={(e) => {
+          e.stopPropagation()
+          onOpenChange(!open)
+        }}
+      >
+        {trigger}
+      </div>
+      {open &&
+        pos &&
+        createPortal(
+          <div ref={panelRef} style={{ position: 'fixed', zIndex: 100, ...pos }} className={panelClassName}>
+            {children}
+          </div>,
+          document.body,
+        )}
+    </>
+  )
+}
diff --git a/src/components/ProviderIcons.tsx b/src/components/ProviderIcons.tsx
new file mode 100644
index 0000000..55ebfb0
--- /dev/null
+++ b/src/components/ProviderIcons.tsx
@@ -0,0 +1,97 @@
+import { Server } from 'lucide-react'
+
+function IconShell({
+  children,
+  bg,
+}: {
+  children: React.ReactNode
+  bg: string
+}) {
+  return (
+    <div
+      className="flex h-9 w-9 items-center justify-center overflow-hidden rounded-full shadow-inner"
+      style={{ background: bg }}
+    >
+      {children}
+    </div>
+  )
+}
+
+function GmailIcon() {
+  return (
+    <IconShell bg="#ffffff">
+      <svg viewBox="0 0 24 24" width="21" height="21">
+        <path d="M2 6.5A2.5 2.5 0 0 1 4.5 4h15A2.5 2.5 0 0 1 22 6.5v11a2.5 2.5 0 0 1-2.5 2.5h-1V9.1l-6.2 4.9a1.8 1.8 0 0 1-2.2 0L3.9 9.1V20h-1A2.5 2.5 0 0 1 0 17.5v-11z" fill="none" />
+        <path d="M4.5 4h1.9l5.6 4.5L17.6 4h1.9A2.5 2.5 0 0 1 22 6.5v.4l-9.1 7.2a1.5 1.5 0 0 1-1.8 0L2 6.9v-.4A2.5 2.5 0 0 1 4.5 4z" fill="#ea4335" />
+        <path d="M2 6.9l7.4 5.9v7.1H4.5A2.5 2.5 0 0 1 2 17.4V6.9z" fill="#4285f4" opacity="0.001" />
+        <path d="M2 7.3l7.7 6.1v6.5H4.5A2.5 2.5 0 0 1 2 17.4V7.3z" fill="#34a853" />
+        <path d="M22 7.3v10.1a2.5 2.5 0 0 1-2.5 2.5h-5.2v-6.5L22 7.3z" fill="#4285f4" />
+        <path d="M2 6.9v.4l7.7 6.1V7.9L6.4 4H4.5A2.5 2.5 0 0 0 2 6.5v.4z" fill="#fbbc04" />
+        <path d="M22 6.9v.4l-7.7 6.1V7.9L17.6 4h1.9A2.5 2.5 0 0 1 22 6.5v.4z" fill="#ea4335" />
+      </svg>
+    </IconShell>
+  )
+}
+
+function OutlookIcon() {
+  return (
+    <IconShell bg="linear-gradient(135deg,#0a2767,#1a5cd6)">
+      <svg viewBox="0 0 24 24" width="19" height="19">
+        <rect x="12.2" y="5" width="9.3" height="8.4" rx="1" fill="#28a8ea" />
+        <rect x="12.2" y="5" width="9.3" height="8.4" rx="1" fill="#0364b8" opacity="0.001" />
+        <path d="M12.2 5h9.3v8.4h-9.3z" fill="#28a8ea" />
+        <path d="M21.5 13.4V19a1 1 0 0 1-1 1h-8.3v-6.6z" fill="#0078d4" opacity=".001" />
+        <circle cx="6.3" cy="12" r="5.3" fill="#0364b8" />
+        <path
+          d="M6.3 8.6c-1.7 0-3 1.5-3 3.4s1.3 3.4 3 3.4 3-1.5 3-3.4-1.3-3.4-3-3.4zm0 5.3c-.9 0-1.6-.9-1.6-1.9s.7-1.9 1.6-1.9 1.6.9 1.6 1.9-.7 1.9-1.6 1.9z"
+          fill="#fff"
+        />
+      </svg>
+    </IconShell>
+  )
+}
+
+function YahooIcon() {
+  return (
+    <IconShell bg="#5f01d1">
+      <span className="text-[13px] font-black tracking-tighter text-white">y!</span>
+    </IconShell>
+  )
+}
+
+function ICloudIcon() {
+  return (
+    <IconShell bg="linear-gradient(135deg,#e6f4ff,#cfeaff)">
+      <svg viewBox="0 0 24 24" width="21" height="21">
+        <path
+          d="M7.5 17.5a4 4 0 0 1-.4-7.98 5 5 0 0 1 9.62-1.9 3.8 3.8 0 0 1 3.78 3.8c0 2.1-1.7 3.8-3.8 3.8V17.5z"
+          fill="#3693f3"
+        />
+        <rect x="3.1" y="14.8" width="14.8" height="2.7" rx="1.35" fill="#3693f3" />
+      </svg>
+    </IconShell>
+  )
+}
+
+function CustomIcon() {
+  return (
+    <IconShell bg="linear-gradient(135deg,#71717a,#52525b)">
+      <Server size={16} className="text-white" />
+    </IconShell>
+  )
+}
+
+export function ProviderIcon({ id }: { id: string }) {
+  switch (id) {
+    case 'gmail':
+      return <GmailIcon />
+    case 'outlook':
+      return <OutlookIcon />
+    case 'yahoo':
+      return <YahooIcon />
+    case 'icloud':
+      return <ICloudIcon />
+    default:
+      return <CustomIcon />
+  }
+}
diff --git a/src/components/ReadingPane.tsx b/src/components/ReadingPane.tsx
new file mode 100644
index 0000000..11b9385
--- /dev/null
+++ b/src/components/ReadingPane.tsx
@@ -0,0 +1,306 @@
+import { useEffect, useMemo, useState } from 'react'
+import { save } from '@tauri-apps/plugin-dialog'
+import {
+  CalendarCheck,
+  CalendarClock,
+  CalendarPlus,
+  CalendarX,
+  CheckSquare,
+  Download,
+  ListPlus,
+  Mail,
+  Paperclip,
+} from 'lucide-react'
+import type { AttachmentMeta, InviteInfo, InviteResponse, MessageFull } from '../types'
+import { Avatar } from './Avatar'
+import { api } from '../lib/api'
+import { formatBytes, formatFullDate } from '../lib/format'
+import { AttachmentPreviewModal, isPreviewable } from './AttachmentPreviewModal'
+
+function isIcsAttachment(att: AttachmentMeta) {
+  return att.mime_type.toLowerCase() === 'text/calendar' || att.filename.toLowerCase().endsWith('.ics')
+}
+
+function InviteBanner({
+  info,
+  onRespond,
+}: {
+  info: InviteInfo
+  onRespond: (response: InviteResponse) => Promise<void>
+}) {
+  const [responding, setResponding] = useState<InviteResponse | null>(null)
+  const [responded, setResponded] = useState<InviteResponse | null>(null)
+
+  async function respond(r: InviteResponse) {
+    setResponding(r)
+    try {
+      await onRespond(r)
+      setResponded(r)
+    } finally {
+      setResponding(null)
+    }
+  }
+
+  const dateLabel = `${new Date(info.start_ts * 1000).toLocaleDateString('de-DE', { weekday: 'short', day: '2-digit', month: 'short' })}${
+    info.all_day ? '' : `, ${new Date(info.start_ts * 1000).toLocaleTimeString('de-DE', { hour: '2-digit', minute: '2-digit' })} – ${new Date(info.end_ts * 1000).toLocaleTimeString('de-DE', { hour: '2-digit', minute: '2-digit' })}`
+  }`
+
+  return (
+    <div className="border-b border-indigo-100 bg-indigo-50/60 px-7 py-3.5 dark:border-indigo-950 dark:bg-indigo-950/30">
+      <p className="text-[12.5px] font-medium text-indigo-800 dark:text-indigo-200">
+        Termineinladung: {info.summary}
+      </p>
+      <p className="text-[11.5px] text-indigo-500 dark:text-indigo-400">
+        {dateLabel}
+        {info.organizer_email && ` · von ${info.organizer_name || info.organizer_email}`}
+      </p>
+      {responded ? (
+        <p className="mt-2 text-[12px] font-medium text-indigo-700 dark:text-indigo-300">
+          {responded === 'accepted' && 'Angenommen — Antwort wurde gesendet.'}
+          {responded === 'declined' && 'Abgelehnt — Antwort wurde gesendet.'}
+          {responded === 'tentative' && 'Mit Vorbehalt beantwortet — Antwort wurde gesendet.'}
+        </p>
+      ) : (
+        <div className="mt-2 flex gap-2">
+          <button
+            onClick={() => respond('accepted')}
+            disabled={responding !== null}
+            className="flex items-center gap-1.5 rounded-full bg-green-600 px-3 py-1.5 text-[12px] font-medium text-white shadow-sm transition hover:bg-green-500 disabled:opacity-60"
+          >
+            <CalendarCheck size={13} /> {responding === 'accepted' ? 'Sende…' : 'Annehmen'}
+          </button>
+          <button
+            onClick={() => respond('tentative')}
+            disabled={responding !== null}
+            className="flex items-center gap-1.5 rounded-full bg-amber-500 px-3 py-1.5 text-[12px] font-medium text-white shadow-sm transition hover:bg-amber-400 disabled:opacity-60"
+          >
+            <CalendarClock size={13} /> {responding === 'tentative' ? 'Sende…' : 'Vorbehalt'}
+          </button>
+          <button
+            onClick={() => respond('declined')}
+            disabled={responding !== null}
+            className="flex items-center gap-1.5 rounded-full bg-zinc-500 px-3 py-1.5 text-[12px] font-medium text-white shadow-sm transition hover:bg-zinc-400 disabled:opacity-60"
+          >
+            <CalendarX size={13} /> {responding === 'declined' ? 'Sende…' : 'Ablehnen'}
+          </button>
+        </div>
+      )}
+    </div>
+  )
+}
+
+function downloadAttachment(filename: string, mimeType: string, base64: string) {
+  const byteChars = atob(base64)
+  const bytes = new Uint8Array(byteChars.length)
+  for (let i = 0; i < byteChars.length; i++) bytes[i] = byteChars.charCodeAt(i)
+  const blob = new Blob([bytes], { type: mimeType || 'application/octet-stream' })
+  const url = URL.createObjectURL(blob)
+  const a = document.createElement('a')
+  a.href = url
+  a.download = filename
+  a.click()
+  URL.revokeObjectURL(url)
+}
+
+export function ReadingPane({
+  message,
+  loading,
+  selectionCount = 0,
+  onImportIcsAttachment,
+  onCreateTask,
+  onReplyToInvite,
+}: {
+  message: MessageFull | null
+  loading: boolean
+  selectionCount?: number
+  onImportIcsAttachment?: (base64: string) => Promise<void>
+  onCreateTask?: (message: MessageFull) => void
+  onReplyToInvite?: (accountId: string, icsBase64: string, response: InviteResponse) => Promise<void>
+}) {
+  const [importingIcs, setImportingIcs] = useState<number | null>(null)
+  const [previewAttachment, setPreviewAttachment] = useState<AttachmentMeta | null>(null)
+  const [invite, setInvite] = useState<{ base64: string; info: InviteInfo } | null>(null)
+
+  useEffect(() => {
+    setInvite(null)
+    if (!message || !onReplyToInvite) return
+    const icsAtt = message.attachments.find(isIcsAttachment)
+    if (!icsAtt) return
+    let cancelled = false
+    api
+      .previewInvite(icsAtt.content_base64)
+      .then((info) => {
+        if (!cancelled && info) setInvite({ base64: icsAtt.content_base64, info })
+      })
+      .catch(() => {})
+    return () => {
+      cancelled = true
+    }
+  }, [message, onReplyToInvite])
+  const srcDoc = useMemo(() => {
+    if (!message) return ''
+    if (message.body_html) {
+      return `<!doctype html><html><head><meta charset="utf-8"><base target="_blank"><style>
+        body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:14px;line-height:1.55;color:#18181b;margin:0;padding:0;word-wrap:break-word;}
+        img{max-width:100%;height:auto;}
+        a{color:#4f46e5;}
+        @media (prefers-color-scheme: dark){ body{color:#e4e4e7;} a{color:#a5b4fc;} }
+      </style></head><body>${message.body_html}</body></html>`
+    }
+    const escaped = (message.body_text || '').replace(/[&<>]/g, (c) => ({ '&': '&amp;', '<': '&lt;', '>': '&gt;' })[c]!)
+    return `<!doctype html><html><head><meta charset="utf-8"><style>
+      body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:14px;line-height:1.55;color:#18181b;margin:0;white-space:pre-wrap;word-wrap:break-word;}
+      @media (prefers-color-scheme: dark){ body{color:#e4e4e7;} }
+    </style></head><body>${escaped}</body></html>`
+  }, [message])
+
+  async function handleExportEml(m: MessageFull) {
+    const suggested = `${m.subject.replace(/[\\/:*?"<>|]/g, '_').slice(0, 60) || 'nachricht'}.eml`
+    const path = await save({ defaultPath: suggested, filters: [{ name: 'E-Mail', extensions: ['eml'] }] })
+    if (!path) return
+    await api.exportMessageEml(m.account_id, m.folder, m.uid, path)
+  }
+
+  if (loading) {
+    return (
+      <div className="flex flex-1 items-center justify-center text-sm text-zinc-400">
+        Lade Nachricht…
+      </div>
+    )
+  }
+
+  if (selectionCount > 1) {
+    return (
+      <div className="flex flex-1 flex-col items-center justify-center gap-3">
+        <div className="flex h-16 w-16 items-center justify-center rounded-full bg-indigo-50 text-indigo-400 dark:bg-indigo-500/10 dark:text-indigo-300">
+          <CheckSquare size={26} strokeWidth={1.4} />
+        </div>
+        <p className="text-sm text-zinc-400">{selectionCount} Nachrichten ausgewählt</p>
+      </div>
+    )
+  }
+
+  if (!message) {
+    return (
+      <div className="flex flex-1 flex-col items-center justify-center gap-3">
+        <div className="flex h-16 w-16 items-center justify-center rounded-full bg-zinc-100 text-zinc-300 dark:bg-zinc-900 dark:text-zinc-700">
+          <Mail size={26} strokeWidth={1.4} />
+        </div>
+        <p className="text-sm text-zinc-400">Wähle eine Nachricht aus</p>
+      </div>
+    )
+  }
+
+  return (
+    <div className="flex min-w-0 flex-1 flex-col">
+      <div className="flex items-start justify-between gap-4 border-b border-zinc-200/80 px-7 py-5 dark:border-zinc-800/80">
+        <div className="min-w-0">
+          <h1 className="truncate text-[18px] font-semibold tracking-tight text-zinc-900 dark:text-zinc-50">
+            {message.subject || '(kein Betreff)'}
+          </h1>
+          <div className="mt-2.5 flex items-center gap-3">
+            <Avatar name={message.from_name || message.from_addr} size={38} />
+            <div className="min-w-0">
+              <p className="truncate text-[13px] font-medium text-zinc-800 dark:text-zinc-200">
+                {message.from_name || message.from_addr}
+                <span className="ml-1.5 font-normal text-zinc-400">&lt;{message.from_addr}&gt;</span>
+              </p>
+              <p className="truncate text-[12px] text-zinc-400">
+                an {message.to || 'mich'} · {formatFullDate(message.date)}
+              </p>
+            </div>
+          </div>
+        </div>
+        <div className="flex shrink-0 items-center gap-1.5">
+          {onCreateTask && (
+            <button
+              onClick={() => onCreateTask(message)}
+              title="Als Aufgabe markieren"
+              className="rounded-full border border-zinc-200 p-1.5 text-zinc-500 shadow-sm transition hover:border-indigo-200 hover:bg-indigo-50 hover:text-indigo-700 dark:border-zinc-700 dark:text-zinc-400 dark:hover:border-indigo-800 dark:hover:bg-indigo-500/10"
+            >
+              <ListPlus size={14} />
+            </button>
+          )}
+          <button
+            onClick={() => handleExportEml(message)}
+            title="Als .eml exportieren"
+            className="rounded-full border border-zinc-200 p-1.5 text-zinc-500 shadow-sm transition hover:border-indigo-200 hover:bg-indigo-50 hover:text-indigo-700 dark:border-zinc-700 dark:text-zinc-400 dark:hover:border-indigo-800 dark:hover:bg-indigo-500/10"
+          >
+            <Download size={14} />
+          </button>
+        </div>
+      </div>
+
+      {invite && onReplyToInvite && (
+        <InviteBanner
+          info={invite.info}
+          onRespond={(response) => onReplyToInvite(message.account_id, invite.base64, response)}
+        />
+      )}
+
+      {message.attachments.length > 0 && (
+        <div className="flex flex-wrap gap-2 border-b border-zinc-200/80 px-7 py-3.5 dark:border-zinc-800/80">
+          {message.attachments.map((att, i) => (
+            <div key={i} className="flex items-center gap-1">
+              <button
+                onClick={() =>
+                  isPreviewable(att) ? setPreviewAttachment(att) : downloadAttachment(att.filename, att.mime_type, att.content_base64)
+                }
+                className="flex items-center gap-2 rounded-full border border-zinc-200 bg-zinc-50 px-3 py-1.5 text-[12px] text-zinc-600 shadow-sm transition hover:border-indigo-200 hover:bg-indigo-50 hover:text-indigo-700 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-300"
+              >
+                <Paperclip size={12} />
+                <span className="max-w-40 truncate">{att.filename}</span>
+                <span className="text-zinc-400">{formatBytes(att.size)}</span>
+                {isPreviewable(att) ? (
+                  <span
+                    onClick={(e) => {
+                      e.stopPropagation()
+                      downloadAttachment(att.filename, att.mime_type, att.content_base64)
+                    }}
+                    title="Herunterladen"
+                    className="text-zinc-400 hover:text-indigo-600"
+                  >
+                    <Download size={11} />
+                  </span>
+                ) : (
+                  <Download size={11} className="text-zinc-400" />
+                )}
+              </button>
+              {isIcsAttachment(att) && onImportIcsAttachment && (
+                <button
+                  onClick={async () => {
+                    setImportingIcs(i)
+                    try {
+                      await onImportIcsAttachment(att.content_base64)
+                    } finally {
+                      setImportingIcs(null)
+                    }
+                  }}
+                  disabled={importingIcs === i}
+                  title="Zum Kalender hinzufügen"
+                  className="flex items-center gap-1.5 rounded-full border border-indigo-200 bg-indigo-50 px-3 py-1.5 text-[12px] font-medium text-indigo-700 shadow-sm transition hover:bg-indigo-100 disabled:opacity-60 dark:border-indigo-800 dark:bg-indigo-500/10 dark:text-indigo-300"
+                >
+                  <CalendarPlus size={12} />
+                  {importingIcs === i ? 'Füge hinzu…' : 'Zum Kalender'}
+                </button>
+              )}
+            </div>
+          ))}
+        </div>
+      )}
+
+      <iframe
+        title="message-body"
+        srcDoc={srcDoc}
+        sandbox=""
+        className="w-full flex-1 bg-white dark:bg-zinc-950"
+      />
+
+      <AttachmentPreviewModal
+        attachment={previewAttachment}
+        onClose={() => setPreviewAttachment(null)}
+        onDownload={(att) => downloadAttachment(att.filename, att.mime_type, att.content_base64)}
+      />
+    </div>
+  )
+}
diff --git a/src/components/RecipientInput.tsx b/src/components/RecipientInput.tsx
new file mode 100644
index 0000000..1532d48
--- /dev/null
+++ b/src/components/RecipientInput.tsx
@@ -0,0 +1,91 @@
+import { useEffect, useRef, useState } from 'react'
+import type { Contact } from '../types'
+import { Avatar } from './Avatar'
+import { api } from '../lib/api'
+
+export function RecipientInput({
+  value,
+  onChange,
+  placeholder,
+}: {
+  value: string
+  onChange: (v: string) => void
+  placeholder?: string
+}) {
+  const [suggestions, setSuggestions] = useState<Contact[]>([])
+  const [open, setOpen] = useState(false)
+  const inputRef = useRef<HTMLInputElement>(null)
+  const wrapRef = useRef<HTMLDivElement>(null)
+
+  useEffect(() => {
+    const token = value.split(',').pop()?.trim() ?? ''
+    if (token.length < 2) {
+      setSuggestions([])
+      return
+    }
+    const t = setTimeout(() => {
+      api
+        .searchContacts(token)
+        .then((res) => {
+          const withEmail = res.filter((c) => !!c.email)
+          setSuggestions(withEmail)
+          setOpen(withEmail.length > 0)
+        })
+        .catch(() => {})
+    }, 150)
+    return () => clearTimeout(t)
+  }, [value])
+
+  useEffect(() => {
+    if (!open) return
+    function onClickOutside(e: MouseEvent) {
+      if (wrapRef.current && !wrapRef.current.contains(e.target as Node)) setOpen(false)
+    }
+    document.addEventListener('mousedown', onClickOutside)
+    return () => document.removeEventListener('mousedown', onClickOutside)
+  }, [open])
+
+  function pick(c: Contact) {
+    const parts = value.split(',')
+    parts[parts.length - 1] = ` ${c.name ? `${c.name} <${c.email}>` : c.email}`
+    onChange(
+      parts
+        .join(',')
+        .replace(/^,\s*/, '')
+        .trimStart() + ', ',
+    )
+    setOpen(false)
+    inputRef.current?.focus()
+  }
+
+  return (
+    <div ref={wrapRef} className="relative flex-1">
+      <input
+        ref={inputRef}
+        value={value}
+        onChange={(e) => onChange(e.target.value)}
+        onFocus={() => suggestions.length > 0 && setOpen(true)}
+        placeholder={placeholder}
+        className="w-full bg-transparent text-[13px] text-zinc-800 outline-none placeholder:text-zinc-300 dark:text-zinc-100"
+      />
+      {open && (
+        <div className="animate-panel-in absolute top-full left-0 right-0 z-20 mt-1.5 max-h-52 overflow-y-auto rounded-2xl border border-zinc-200/80 bg-white/95 py-1.5 shadow-xl backdrop-blur-xl dark:border-zinc-800 dark:bg-zinc-900/95">
+          {suggestions.map((c) => (
+            <button
+              key={c.id}
+              type="button"
+              onClick={() => pick(c)}
+              className="flex w-full items-center gap-2.5 px-3 py-1.5 text-left transition hover:bg-indigo-50 dark:hover:bg-indigo-500/10"
+            >
+              <Avatar name={c.name || c.email || '?'} size={24} />
+              <div className="min-w-0">
+                <p className="truncate text-[12.5px] text-zinc-700 dark:text-zinc-200">{c.name || c.email}</p>
+                <p className="truncate text-[11px] text-zinc-400">{c.email}</p>
+              </div>
+            </button>
+          ))}
+        </div>
+      )}
+    </div>
+  )
+}
diff --git a/src/components/RecurrenceScopeModal.tsx b/src/components/RecurrenceScopeModal.tsx
new file mode 100644
index 0000000..25c9cc6
--- /dev/null
+++ b/src/components/RecurrenceScopeModal.tsx
@@ -0,0 +1,52 @@
+import { CalendarDays, Repeat, X } from 'lucide-react'
+
+export function RecurrenceScopeModal({
+  open,
+  title,
+  onChoose,
+  onCancel,
+}: {
+  open: boolean
+  title: string
+  onChoose: (scope: 'occurrence' | 'series') => void
+  onCancel: () => void
+}) {
+  if (!open) return null
+  return (
+    <div
+      className="animate-overlay-in fixed inset-0 z-50 flex items-center justify-center bg-zinc-900/40 p-6 backdrop-blur-sm dark:bg-black/60"
+      onClick={onCancel}
+    >
+      <div
+        onClick={(e) => e.stopPropagation()}
+        className="animate-panel-in w-full max-w-sm overflow-hidden rounded-[28px] border border-white/70 bg-white/95 shadow-[0_24px_70px_-12px_rgba(15,15,25,0.35)] ring-1 ring-black/[0.03] backdrop-blur-2xl dark:border-white/10 dark:bg-zinc-900/90"
+      >
+        <div className="flex items-center justify-between border-b border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <h2 className="text-[15px] font-semibold tracking-tight text-zinc-800 dark:text-zinc-100">{title}</h2>
+          <button
+            onClick={onCancel}
+            className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+          >
+            <X size={16} />
+          </button>
+        </div>
+        <div className="space-y-2 p-4">
+          <button
+            onClick={() => onChoose('occurrence')}
+            className="flex w-full items-center gap-3 rounded-2xl border border-zinc-200/80 px-4 py-3 text-left transition hover:border-indigo-300 hover:bg-indigo-50/60 dark:border-zinc-800 dark:hover:border-indigo-800 dark:hover:bg-indigo-500/10"
+          >
+            <CalendarDays size={17} className="shrink-0 text-indigo-500" />
+            <span className="text-[13px] font-medium text-zinc-700 dark:text-zinc-200">Nur diesen Termin</span>
+          </button>
+          <button
+            onClick={() => onChoose('series')}
+            className="flex w-full items-center gap-3 rounded-2xl border border-zinc-200/80 px-4 py-3 text-left transition hover:border-indigo-300 hover:bg-indigo-50/60 dark:border-zinc-800 dark:hover:border-indigo-800 dark:hover:bg-indigo-500/10"
+          >
+            <Repeat size={17} className="shrink-0 text-indigo-500" />
+            <span className="text-[13px] font-medium text-zinc-700 dark:text-zinc-200">Die ganze Serie</span>
+          </button>
+        </div>
+      </div>
+    </div>
+  )
+}
diff --git a/src/components/Ribbon.tsx b/src/components/Ribbon.tsx
new file mode 100644
index 0000000..e0e5fa7
--- /dev/null
+++ b/src/components/Ribbon.tsx
@@ -0,0 +1,564 @@
+import { useState } from 'react'
+import {
+  AlignJustify,
+  ArrowDownAZ,
+  ArrowUpDown,
+  Archive,
+  Bell,
+  BellRing,
+  BookUser,
+  CalendarDays,
+  CalendarPlus,
+  Download,
+  FilePlus2,
+  Filter,
+  FolderCog,
+  FolderInput,
+  FolderPlus,
+  FolderX,
+  Forward,
+  Globe,
+  Keyboard,
+  Info,
+  ListFilter,
+  ListPlus,
+  MailCheck,
+  MailOpen,
+  MailPlus,
+  MailSearch,
+  MessagesSquare,
+  Monitor,
+  Moon,
+  Pencil,
+  RefreshCcw,
+  Reply,
+  ReplyAll,
+  RefreshCw,
+  RotateCcw,
+  Rows3,
+  Rows4,
+  Settings,
+  ShieldOff,
+  Star,
+  Sun,
+  Tags,
+  Trash2,
+  Upload,
+  UserPlus,
+  Volume2,
+  WifiOff,
+} from 'lucide-react'
+import clsx from 'clsx'
+import type { Account, Event as CalendarEvent, Folder, MessageFull, MessageSummary } from '../types'
+import type { SidebarView } from './Sidebar'
+import type { Density, Theme } from '../lib/theme'
+import { CATEGORY_COLORS } from '../lib/categories'
+import { api } from '../lib/api'
+import { ClassicButton, ClassicDropdown, ClassicMenuItem, ClassicRibbonBody, ClassicRibbonGroup, ClassicTabBar } from './ClassicRibbonUI'
+import { GoogleCalendarMenu } from './GoogleCalendarMenu'
+
+type RibbonTab = 'start' | 'sendrecv' | 'folder' | 'view' | 'help'
+export type SortBy = 'date' | 'from' | 'subject'
+export type EmailFilter = 'none' | 'unread' | 'flagged' | 'attachments'
+
+function MoveMenu({
+  folders,
+  currentFolder,
+  onMove,
+  disabled,
+}: {
+  folders: Folder[]
+  currentFolder: string | null
+  onMove: (target: string) => void
+  disabled: boolean
+}) {
+  const [open, setOpen] = useState(false)
+  const targets = folders.filter((f) => f.name !== currentFolder)
+  return (
+    <ClassicDropdown
+      open={open}
+      onOpenChange={setOpen}
+      button={<ClassicButton icon={FolderInput} label="Verschieben" disabled={disabled || targets.length === 0} />}
+    >
+      {targets.map((f) => (
+        <ClassicMenuItem
+          key={f.name}
+          onClick={() => {
+            onMove(f.name)
+            setOpen(false)
+          }}
+        >
+          {f.display_name}
+        </ClassicMenuItem>
+      ))}
+    </ClassicDropdown>
+  )
+}
+
+function CategoryMenu({ onSet, disabled }: { onSet: (c: string | null) => void; disabled: boolean }) {
+  const [open, setOpen] = useState(false)
+  return (
+    <ClassicDropdown
+      open={open}
+      onOpenChange={setOpen}
+      button={<ClassicButton icon={Tags} label="Kategorisieren" disabled={disabled} />}
+    >
+      {CATEGORY_COLORS.map((c) => (
+        <ClassicMenuItem
+          key={c.id}
+          onClick={() => {
+            onSet(c.id)
+            setOpen(false)
+          }}
+        >
+          <span className="h-3 w-3 rounded-full" style={{ backgroundColor: c.hex }} />
+          {c.label}
+        </ClassicMenuItem>
+      ))}
+      <ClassicMenuItem
+        onClick={() => {
+          onSet(null)
+          setOpen(false)
+        }}
+      >
+        Keine Kategorie
+      </ClassicMenuItem>
+    </ClassicDropdown>
+  )
+}
+
+function NewItemMenu({ onEmail, onEvent, onContact }: { onEmail: () => void; onEvent: () => void; onContact: () => void }) {
+  const [open, setOpen] = useState(false)
+  return (
+    <ClassicDropdown
+      open={open}
+      onOpenChange={setOpen}
+      button={<ClassicButton icon={FilePlus2} label="Neue Elemente" />}
+    >
+      <ClassicMenuItem onClick={() => { onEmail(); setOpen(false) }}>
+        <MailPlus size={13} /> E-Mail-Nachricht
+      </ClassicMenuItem>
+      <ClassicMenuItem onClick={() => { onEvent(); setOpen(false) }}>
+        <CalendarPlus size={13} /> Termin
+      </ClassicMenuItem>
+      <ClassicMenuItem onClick={() => { onContact(); setOpen(false) }}>
+        <UserPlus size={13} /> Kontakt
+      </ClassicMenuItem>
+    </ClassicDropdown>
+  )
+}
+
+function FilterMenu({ value, onChange }: { value: EmailFilter; onChange: (f: EmailFilter) => void }) {
+  const [open, setOpen] = useState(false)
+  const labels: Record<EmailFilter, string> = { none: 'Kein Filter', unread: 'Ungelesen', flagged: 'Markiert', attachments: 'Hat Anhänge' }
+  return (
+    <ClassicDropdown open={open} onOpenChange={setOpen} button={<ClassicButton icon={ListFilter} label="E-Mail filtern" active={value !== 'none'} />}>
+      {(Object.keys(labels) as EmailFilter[]).map((k) => (
+        <ClassicMenuItem key={k} onClick={() => { onChange(k); setOpen(false) }}>
+          {value === k ? '✓ ' : ''}{labels[k]}
+        </ClassicMenuItem>
+      ))}
+    </ClassicDropdown>
+  )
+}
+
+function HelpMenu({ onShowShortcuts }: { onShowShortcuts: () => void }) {
+  return <ClassicButton icon={Keyboard} label="Tastenkürzel" onClick={onShowShortcuts} />
+}
+
+function AboutMenu() {
+  const [open, setOpen] = useState(false)
+  return (
+    <ClassicDropdown open={open} onOpenChange={setOpen} widthClass="w-72" button={<ClassicButton icon={Info} label="Über" />}>
+      <div className="px-3 py-2 text-[12.5px] text-zinc-600 dark:text-zinc-300">
+        <p className="mb-1 font-semibold text-zinc-800 dark:text-zinc-100">Mail Client</p>
+        <p>Ein nativer Desktop-Mail-Client mit eigenem IMAP-, POP3- und SMTP-Backend.</p>
+      </div>
+    </ClassicDropdown>
+  )
+}
+
+function RemindersMenu() {
+  const [open, setOpen] = useState(false)
+  const [items, setItems] = useState<CalendarEvent[]>([])
+  const [loading, setLoading] = useState(false)
+
+  function load() {
+    setLoading(true)
+    api.listUpcomingReminders(24).then(setItems).catch(() => {}).finally(() => setLoading(false))
+  }
+
+  return (
+    <ClassicDropdown
+      open={open}
+      onOpenChange={(v) => { setOpen(v); if (v) load() }}
+      widthClass="w-72"
+      button={<ClassicButton icon={Bell} label="Erinnerungsfenster" />}
+    >
+      <p className="px-3 pb-1.5 text-[11px] font-semibold tracking-wide text-zinc-400 uppercase">Nächste 24 Stunden</p>
+      {loading ? (
+        <p className="px-3 py-2 text-[12px] text-zinc-400">Lade…</p>
+      ) : items.length === 0 ? (
+        <p className="px-3 py-2 text-[12px] text-zinc-400">Keine anstehenden Erinnerungen.</p>
+      ) : (
+        items.map((e) => (
+          <div key={e.id} className="px-3 py-1.5 text-[12.5px] text-zinc-700 dark:text-zinc-200">
+            <p className="font-medium">{e.title}</p>
+            <p className="text-[11px] text-zinc-400">{new Date(e.start_ts * 1000).toLocaleString('de-DE')}</p>
+          </div>
+        ))
+      )}
+    </ClassicDropdown>
+  )
+}
+
+export function Ribbon({
+  view,
+  onChangeView,
+  selectedMessage,
+  selectedSummary,
+  selectionCount = 0,
+  folders,
+  currentAccountId,
+  accounts,
+  onCompose,
+  composeDisabled,
+  onReply,
+  onReplyAll,
+  onForward,
+  onDelete,
+  onArchive,
+  onMove,
+  onToggleRead,
+  onMarkDone,
+  onToggleFlag,
+  onSetCategory,
+  onRefresh,
+  onRefreshAll,
+  refreshing,
+  offlineMode,
+  onToggleOffline,
+  emailFilter,
+  onEmailFilterChange,
+  onAddContact,
+  onNewFolder,
+  onRenameFolder,
+  onDeleteFolder,
+  onMarkFolderRead,
+  onApplyRulesToFolder,
+  onManageRules,
+  onManageBlocked,
+  onShowSnoozed,
+  onShowShortcuts,
+  onSortFoldersAZ,
+  onAddFavorite,
+  onNewSearchFolder,
+  groupConversations,
+  onGroupConversationsChange,
+  density,
+  onDensityChange,
+  sidebarCollapsed,
+  onToggleSidebar,
+  sortBy,
+  sortDesc,
+  onSortByChange,
+  onToggleSortDesc,
+  onResetView,
+  onNewTask,
+  onNewEvent,
+  onGoToToday,
+  onImportIcs,
+  onExportIcs,
+  googleAccounts,
+  onSyncGoogleCalendar,
+  onReconnectGoogleAccount,
+  onOpenCaldav,
+  theme,
+  onThemeChange,
+  onOpenSettings,
+}: {
+  view: SidebarView
+  onChangeView: (v: SidebarView) => void
+  selectedMessage: MessageFull | null
+  selectedSummary: MessageSummary | null
+  selectionCount?: number
+  folders: Folder[]
+  currentAccountId: string | null
+  accounts: Account[]
+  onCompose: () => void
+  composeDisabled: boolean
+  onReply: () => void
+  onReplyAll: () => void
+  onForward: () => void
+  onDelete: () => void
+  onArchive: () => void
+  onMove: (target: string) => void
+  onToggleRead: () => void
+  onMarkDone: () => void
+  onToggleFlag: () => void
+  onSetCategory: (c: string | null) => void
+  onRefresh: () => void
+  onRefreshAll: () => void
+  refreshing: boolean
+  offlineMode: boolean
+  onToggleOffline: () => void
+  emailFilter: EmailFilter
+  onEmailFilterChange: (f: EmailFilter) => void
+  onAddContact: () => void
+  onNewFolder: () => void
+  onRenameFolder: () => void
+  onDeleteFolder: () => void
+  onMarkFolderRead: () => void
+  onApplyRulesToFolder: () => void
+  onManageRules: () => void
+  onManageBlocked: () => void
+  onShowSnoozed: () => void
+  onShowShortcuts: () => void
+  onSortFoldersAZ: () => void
+  onAddFavorite: () => void
+  onNewSearchFolder: () => void
+  groupConversations: boolean
+  onGroupConversationsChange: (v: boolean) => void
+  density: Density
+  onDensityChange: (d: Density) => void
+  sidebarCollapsed: boolean
+  onToggleSidebar: () => void
+  sortBy: SortBy
+  sortDesc: boolean
+  onSortByChange: (s: SortBy) => void
+  onToggleSortDesc: () => void
+  onResetView: () => void
+  onNewTask?: () => void
+  onNewEvent?: () => void
+  onGoToToday?: () => void
+  onImportIcs?: () => void
+  onExportIcs?: () => void
+  googleAccounts?: Account[]
+  onSyncGoogleCalendar?: (accountId: string) => Promise<void>
+  onReconnectGoogleAccount?: (accountId: string) => Promise<void>
+  onOpenCaldav?: () => void
+  theme: Theme
+  onThemeChange: (t: Theme) => void
+  onOpenSettings: () => void
+}) {
+  const [tab, setTab] = useState<RibbonTab>('start')
+  const hasSingle = !!selectedMessage
+  const hasSelection = hasSingle || selectionCount > 1
+  const account = accounts.find((a) => a.id === currentAccountId) ?? null
+  const isLocal = account?.protocol === 'local'
+
+  function readAloud() {
+    if (!selectedMessage) return
+    const text = selectedMessage.body_text || (selectedMessage.body_html ?? '').replace(/<[^>]+>/g, ' ')
+    if (!('speechSynthesis' in window) || !text.trim()) return
+    window.speechSynthesis.cancel()
+    const utter = new SpeechSynthesisUtterance(`${selectedMessage.subject}. ${text}`)
+    utter.lang = 'de-DE'
+    window.speechSynthesis.speak(utter)
+  }
+
+  const tabs = [
+    { id: 'start', label: 'Start' },
+    { id: 'sendrecv', label: 'Senden/Empfangen' },
+    { id: 'folder', label: 'Ordner' },
+    { id: 'view', label: 'Ansicht' },
+    { id: 'help', label: 'Hilfe' },
+  ]
+
+  return (
+    <div className="w-full border-b border-[#0d3a6e] shadow-sm">
+      <ClassicTabBar
+        tabs={view === 'mail' ? tabs : tabs.filter((t) => t.id !== 'sendrecv' && t.id !== 'folder')}
+        active={tab}
+        onChange={(id) => setTab(id as RibbonTab)}
+        rightSlot={
+          <button
+            onClick={onOpenSettings}
+            title="Einstellungen"
+            className="rounded-full p-1.5 text-white/80 transition hover:bg-white/10 hover:text-white"
+          >
+            <Settings size={15} />
+          </button>
+        }
+      />
+      <ClassicRibbonBody>
+        {tab === 'start' && view === 'mail' && (
+          <>
+            <ClassicRibbonGroup caption="Neu">
+              <ClassicButton icon={MailPlus} label="Neue E-Mail" onClick={onCompose} disabled={composeDisabled} />
+              <NewItemMenu onEmail={onCompose} onEvent={() => { onChangeView('calendar'); onNewEvent?.() }} onContact={onAddContact} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Löschen">
+              <ClassicButton icon={Trash2} label={selectionCount > 1 ? `Löschen (${selectionCount})` : 'Löschen'} onClick={onDelete} disabled={!hasSelection} />
+              <ClassicButton icon={Archive} label="Archivieren" onClick={onArchive} disabled={!hasSelection || isLocal} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Antworten">
+              <ClassicButton icon={Reply} label="Antworten" onClick={onReply} disabled={!hasSingle} />
+              <ClassicButton icon={ReplyAll} label="Allen antw." onClick={onReplyAll} disabled={!hasSingle} />
+              <ClassicButton icon={Forward} label="Weiterleiten" onClick={onForward} disabled={!hasSingle} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="QuickSteps">
+              <MoveMenu folders={folders} currentFolder={selectionCount > 1 ? null : selectedMessage?.folder ?? null} onMove={onMove} disabled={!hasSelection} />
+              <ClassicButton icon={MailCheck} label="Erledigt" onClick={onMarkDone} disabled={!hasSelection} title="Als gelesen markieren und Kennzeichnung entfernen" />
+              <ClassicButton icon={Pencil} label="Neu erstellen" disabled title="Individuelle QuickSteps: in dieser Version nicht verfügbar" />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Verschieben">
+              <MoveMenu folders={folders} currentFolder={selectionCount > 1 ? null : selectedMessage?.folder ?? null} onMove={onMove} disabled={!hasSelection} />
+              <ClassicButton icon={Filter} label="Regeln" onClick={onManageRules} />
+              <ClassicButton icon={ShieldOff} label="Blockiert" onClick={onManageBlocked} />
+              <ClassicButton icon={BellRing} label="Wiedervorlage" onClick={onShowSnoozed} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Kategorien">
+              <CategoryMenu onSet={onSetCategory} disabled={!selectedSummary && selectionCount <= 1} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Suchen">
+              <ClassicButton icon={BookUser} label="Adressbuch" onClick={() => onChangeView('contacts')} />
+              <FilterMenu value={emailFilter} onChange={onEmailFilterChange} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Sprache">
+              <ClassicButton icon={Volume2} label="Laut vorlesen" onClick={readAloud} disabled={!hasSingle} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Kennzeichnen">
+              <ClassicButton icon={MailOpen} label="Ungelesen" onClick={onToggleRead} disabled={!hasSelection} />
+              <ClassicButton icon={Star} label="Markieren" onClick={onToggleFlag} disabled={!hasSelection} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Add-Ins">
+              <ClassicButton icon={FolderCog} label="Add-Ins abrufen" disabled title="Add-In-Marktplatz: in dieser Version nicht verfügbar" />
+            </ClassicRibbonGroup>
+          </>
+        )}
+
+        {tab === 'start' && view === 'contacts' && (
+          <ClassicRibbonGroup caption="Neu">
+            <ClassicButton icon={UserPlus} label="Neuer Kontakt" onClick={onAddContact} />
+          </ClassicRibbonGroup>
+        )}
+
+        {tab === 'start' && view === 'calendar' && (
+          <>
+            <ClassicRibbonGroup caption="Neu">
+              <ClassicButton icon={CalendarPlus} label="Neuer Termin" onClick={() => onNewEvent?.()} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Ansicht">
+              <ClassicButton icon={CalendarDays} label="Heute" onClick={() => onGoToToday?.()} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Austausch">
+              <ClassicButton icon={Upload} label="Importieren (.ics)" onClick={() => onImportIcs?.()} />
+              <ClassicButton icon={Download} label="Exportieren (.ics)" onClick={() => onExportIcs?.()} />
+            </ClassicRibbonGroup>
+            {googleAccounts && googleAccounts.length > 0 && onSyncGoogleCalendar && onReconnectGoogleAccount && (
+              <ClassicRibbonGroup caption="Google">
+                <GoogleCalendarMenu accounts={googleAccounts} onSync={onSyncGoogleCalendar} onReconnect={onReconnectGoogleAccount} />
+              </ClassicRibbonGroup>
+            )}
+            {onOpenCaldav && (
+              <ClassicRibbonGroup caption="Andere Kalender">
+                <ClassicButton icon={Globe} label="CalDAV" onClick={onOpenCaldav} />
+              </ClassicRibbonGroup>
+            )}
+          </>
+        )}
+
+        {tab === 'start' && view === 'tasks' && (
+          <ClassicRibbonGroup caption="Neu">
+            <ClassicButton icon={ListPlus} label="Neue Aufgabe" onClick={() => onNewTask?.()} />
+          </ClassicRibbonGroup>
+        )}
+
+        {tab === 'sendrecv' && (
+          <>
+            <ClassicRibbonGroup caption="Senden und Empfangen">
+              <ClassicButton icon={RefreshCcw} label="Alle Ordner senden/empfangen" onClick={onRefreshAll} disabled={refreshing} />
+              <ClassicButton icon={RefreshCw} label="Ordner aktualisieren" onClick={onRefresh} disabled={refreshing || !currentAccountId} />
+              <ClassicButton icon={Upload} label="Alle senden" disabled title="Kein Offline-Postausgang in dieser Version" />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Download">
+              <ClassicButton icon={Info} label="Status anzeigen" disabled title="Nicht verfügbar" />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Server">
+              <ClassicButton icon={Download} label="Kopfzeilen herunterladen" disabled title="Nicht verfügbar für dieses Konto" />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Einstellungen">
+              <ClassicButton icon={FolderCog} label="Downloadeinstellungen" disabled title="Nicht verfügbar" />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Offline">
+              <ClassicButton icon={WifiOff} label="Offline arbeiten" onClick={onToggleOffline} active={offlineMode} />
+            </ClassicRibbonGroup>
+          </>
+        )}
+
+        {tab === 'folder' && (
+          <>
+            <ClassicRibbonGroup caption="Neu">
+              <ClassicButton icon={FolderPlus} label="Neuer Ordner" onClick={onNewFolder} disabled={!currentAccountId || isLocal} />
+              <ClassicButton icon={MailSearch} label="Neuer Suchordner" onClick={onNewSearchFolder} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Aktionen">
+              <ClassicButton icon={Pencil} label="Ordner umbenennen" onClick={onRenameFolder} disabled={!currentAccountId || isLocal} />
+              <ClassicButton icon={FolderX} label="Ordner löschen" onClick={onDeleteFolder} disabled={!currentAccountId || isLocal} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Aufräumen">
+              <ClassicButton icon={MailCheck} label="Alles als gelesen markieren" onClick={onMarkFolderRead} disabled={!currentAccountId} />
+              <ClassicButton icon={Filter} label="Regeln jetzt anwenden" onClick={onApplyRulesToFolder} disabled={!currentAccountId || isLocal} />
+              <ClassicButton icon={ArrowDownAZ} label="Alle Ordner von A bis Z" onClick={onSortFoldersAZ} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Favoriten">
+              <ClassicButton icon={Star} label="Zu Favoriten hinzufügen" onClick={onAddFavorite} disabled={!currentAccountId} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Eigenschaften">
+              <ClassicButton icon={FolderCog} label="Ordnereigenschaften" disabled title="Nicht verfügbar" />
+            </ClassicRibbonGroup>
+          </>
+        )}
+
+        {tab === 'view' && (
+          <>
+            <ClassicRibbonGroup caption="Aktuelle Ansicht">
+              <ClassicButton icon={RotateCcw} label="Ansicht zurücksetzen" onClick={onResetView} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Nachrichten">
+              <ClassicButton icon={MessagesSquare} label="Als Unterhaltungen anzeigen" onClick={() => onGroupConversationsChange(!groupConversations)} active={groupConversations} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Anordnung">
+              <div className="flex flex-col gap-0.5 pt-1">
+                {(['date', 'from', 'subject'] as SortBy[]).map((s) => (
+                  <button
+                    key={s}
+                    onClick={() => onSortByChange(s)}
+                    className={clsx(
+                      'rounded-sm px-1.5 py-0.5 text-left text-[11.5px]',
+                      sortBy === s ? 'bg-[#cce4f7] dark:bg-blue-500/20' : 'hover:bg-[#e6f2fb] dark:hover:bg-zinc-700/60',
+                    )}
+                  >
+                    {s === 'date' ? 'Datum' : s === 'from' ? 'Von' : 'Betreff'}
+                  </button>
+                ))}
+              </div>
+              <ClassicButton icon={ArrowUpDown} label="Sortierreihenfolge umkehren" onClick={onToggleSortDesc} active={!sortDesc} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Layout">
+              <ClassicButton icon={Rows4} label="Normal" onClick={() => onDensityChange('comfortable')} active={density === 'comfortable'} />
+              <ClassicButton icon={Rows3} label="Kompakt" onClick={() => onDensityChange('compact')} active={density === 'compact'} />
+              <ClassicButton icon={AlignJustify} label="Ordnerbereich" onClick={onToggleSidebar} active={sidebarCollapsed} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Design">
+              <ClassicButton icon={Sun} label="Hell" onClick={() => onThemeChange('light')} active={theme === 'light'} />
+              <ClassicButton icon={Moon} label="Dunkel" onClick={() => onThemeChange('dark')} active={theme === 'dark'} />
+              <ClassicButton icon={Monitor} label="System" onClick={() => onThemeChange('system')} active={theme === 'system'} />
+            </ClassicRibbonGroup>
+            <ClassicRibbonGroup caption="Fenster">
+              <RemindersMenu />
+            </ClassicRibbonGroup>
+          </>
+        )}
+
+        {tab === 'help' && (
+          <ClassicRibbonGroup caption="Support">
+            <HelpMenu onShowShortcuts={onShowShortcuts} />
+            <AboutMenu />
+          </ClassicRibbonGroup>
+        )}
+      </ClassicRibbonBody>
+    </div>
+  )
+}
diff --git a/src/components/RibbonButton.tsx b/src/components/RibbonButton.tsx
new file mode 100644
index 0000000..b4d0145
--- /dev/null
+++ b/src/components/RibbonButton.tsx
@@ -0,0 +1,35 @@
+import clsx from 'clsx'
+
+export function RibbonButton({
+  icon: Icon,
+  label,
+  onClick,
+  disabled,
+  active,
+  primary,
+}: {
+  icon: React.ComponentType<{ size?: number }>
+  label: string
+  onClick: () => void
+  disabled?: boolean
+  active?: boolean
+  primary?: boolean
+}) {
+  return (
+    <button
+      onClick={onClick}
+      disabled={disabled}
+      className={clsx(
+        'flex h-14 w-16 flex-col items-center justify-center gap-1 rounded-lg text-[11px] font-medium transition disabled:cursor-not-allowed disabled:opacity-35',
+        primary
+          ? 'text-indigo-600 hover:bg-indigo-50 dark:text-indigo-400 dark:hover:bg-indigo-500/10'
+          : active
+            ? 'bg-indigo-50 text-indigo-700 dark:bg-indigo-500/15 dark:text-indigo-300'
+            : 'text-zinc-600 hover:bg-zinc-100 dark:text-zinc-300 dark:hover:bg-zinc-800',
+      )}
+    >
+      <Icon size={19} />
+      <span className="leading-none">{label}</span>
+    </button>
+  )
+}
diff --git a/src/components/RichTextEditor.tsx b/src/components/RichTextEditor.tsx
new file mode 100644
index 0000000..b9ef61a
--- /dev/null
+++ b/src/components/RichTextEditor.tsx
@@ -0,0 +1,68 @@
+import { forwardRef, useEffect, useImperativeHandle, useRef } from 'react'
+import { htmlIsEmpty } from '../lib/richtext'
+
+export interface RichTextEditorHandle {
+  exec: (command: string, value?: string) => void
+  focus: () => void
+  wordCount: () => number
+}
+
+export const RichTextEditor = forwardRef<
+  RichTextEditorHandle,
+  {
+    html: string
+    resetKey: unknown
+    onChange: (html: string) => void
+    placeholder?: string
+    spellCheck?: boolean
+  }
+>(function RichTextEditor({ html, resetKey, onChange, placeholder, spellCheck = true }, ref) {
+  const editorRef = useRef<HTMLDivElement>(null)
+
+  useEffect(() => {
+    if (editorRef.current) {
+      editorRef.current.innerHTML = html
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [resetKey])
+
+  function handleInput() {
+    onChange(editorRef.current?.innerHTML ?? '')
+  }
+
+  useImperativeHandle(ref, () => ({
+    exec(command: string, value?: string) {
+      editorRef.current?.focus()
+      document.execCommand(command, false, value)
+      handleInput()
+    },
+    focus() {
+      editorRef.current?.focus()
+    },
+    wordCount() {
+      const text = editorRef.current?.textContent ?? ''
+      return text.trim() ? text.trim().split(/\s+/).length : 0
+    },
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }))
+
+  const empty = htmlIsEmpty(html)
+
+  return (
+    <div className="relative min-h-0 flex-1 overflow-y-auto">
+      {empty && (
+        <span className="pointer-events-none absolute top-5 left-7 text-[13.5px] text-zinc-300 select-none dark:text-zinc-600">
+          {placeholder}
+        </span>
+      )}
+      <div
+        ref={editorRef}
+        contentEditable
+        spellCheck={spellCheck}
+        onInput={handleInput}
+        suppressContentEditableWarning
+        className="compose-body min-h-full px-7 py-5 text-[13.5px] leading-relaxed text-zinc-800 outline-none dark:text-zinc-100"
+      />
+    </div>
+  )
+})
diff --git a/src/components/RulesModal.tsx b/src/components/RulesModal.tsx
new file mode 100644
index 0000000..226ab56
--- /dev/null
+++ b/src/components/RulesModal.tsx
@@ -0,0 +1,325 @@
+import { useEffect, useState } from 'react'
+import { Plus, Trash2, X } from 'lucide-react'
+import { api } from '../lib/api'
+import type { Account, Folder, MatchType, NewRule, Rule, RuleAction, RuleCondition } from '../types'
+
+const inputClass =
+  'rounded-lg border border-zinc-200 bg-white px-3 py-1.5 text-[13px] text-zinc-800 outline-none transition focus:border-indigo-400 focus:ring-2 focus:ring-indigo-100 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-100 dark:focus:ring-indigo-500/20'
+
+function Field({ label, children }: { label: string; children: React.ReactNode }) {
+  return (
+    <label className="flex flex-col gap-1">
+      <span className="text-[11.5px] font-medium text-zinc-500 dark:text-zinc-400">{label}</span>
+      {children}
+    </label>
+  )
+}
+
+function conditionsSummary(conditions: RuleCondition[], matchType: MatchType) {
+  const parts = conditions.map((c) => `${c.field === 'subject' ? 'Betreff' : 'Absender'} enthält „${c.contains}“`)
+  const joiner = matchType === 'all' ? ' UND ' : ' ODER '
+  return parts.join(joiner)
+}
+
+function actionLabel(r: Rule, accountFolders: Record<string, Folder[]>) {
+  switch (r.action) {
+    case 'move_to': {
+      const folders = r.account_id ? accountFolders[r.account_id] ?? [] : []
+      const folder = folders.find((f) => f.name === r.action_value)
+      return `verschieben nach „${folder?.display_name ?? r.action_value}“`
+    }
+    case 'mark_read':
+      return 'als gelesen markieren'
+    case 'flag':
+      return 'markieren'
+    case 'delete':
+      return 'löschen'
+  }
+}
+
+const emptyCondition = (): RuleCondition => ({ field: 'from', contains: '' })
+
+export function RulesModal({
+  open,
+  onClose,
+  accounts,
+  accountFolders,
+  onToast,
+}: {
+  open: boolean
+  onClose: () => void
+  accounts: Account[]
+  accountFolders: Record<string, Folder[]>
+  onToast: (msg: string) => void
+}) {
+  const [rules, setRules] = useState<Rule[]>([])
+  const [loading, setLoading] = useState(false)
+
+  const [accountId, setAccountId] = useState('')
+  const [conditions, setConditions] = useState<RuleCondition[]>([emptyCondition()])
+  const [matchType, setMatchType] = useState<MatchType>('all')
+  const [action, setAction] = useState<RuleAction>('move_to')
+  const [actionValue, setActionValue] = useState('')
+  const [saving, setSaving] = useState(false)
+
+  const ruleAccounts = accounts.filter((a) => a.protocol === 'imap' || a.protocol === 'pop3')
+  const targetFolders = accountId ? accountFolders[accountId] ?? [] : []
+  const validConditions = conditions.filter((c) => c.contains.trim())
+  const isPop3 = accounts.find((a) => a.id === accountId)?.protocol === 'pop3'
+
+  function refresh() {
+    setLoading(true)
+    api
+      .listRules()
+      .then(setRules)
+      .catch((e) => onToast(`Regeln konnten nicht geladen werden: ${e}`))
+      .finally(() => setLoading(false))
+  }
+
+  useEffect(() => {
+    if (open) refresh()
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [open])
+
+  if (!open) return null
+
+  function updateCondition(index: number, patch: Partial<RuleCondition>) {
+    setConditions((prev) => prev.map((c, i) => (i === index ? { ...c, ...patch } : c)))
+  }
+
+  function addCondition() {
+    setConditions((prev) => [...prev, emptyCondition()])
+  }
+
+  function removeCondition(index: number) {
+    setConditions((prev) => (prev.length > 1 ? prev.filter((_, i) => i !== index) : prev))
+  }
+
+  async function handleAdd(e: React.FormEvent) {
+    e.preventDefault()
+    if (validConditions.length === 0) return
+    if (action === 'move_to' && !actionValue) return
+    setSaving(true)
+    try {
+      const newRule: NewRule = {
+        account_id: accountId || null,
+        conditions: validConditions.map((c) => ({ field: c.field, contains: c.contains.trim() })),
+        match_type: matchType,
+        action,
+        action_value: action === 'move_to' ? actionValue : undefined,
+      }
+      await api.createRule(newRule)
+      setConditions([emptyCondition()])
+      setMatchType('all')
+      setActionValue('')
+      refresh()
+      onToast('Regel erstellt')
+    } catch (err) {
+      onToast(`Fehlgeschlagen: ${err}`)
+    } finally {
+      setSaving(false)
+    }
+  }
+
+  async function handleToggle(r: Rule) {
+    setRules((prev) => prev.map((x) => (x.id === r.id ? { ...x, enabled: !x.enabled } : x)))
+    try {
+      await api.setRuleEnabled(r.id, !r.enabled)
+    } catch (err) {
+      onToast(String(err))
+    }
+  }
+
+  async function handleDelete(r: Rule) {
+    setRules((prev) => prev.filter((x) => x.id !== r.id))
+    try {
+      await api.deleteRule(r.id)
+    } catch (err) {
+      onToast(String(err))
+    }
+  }
+
+  return (
+    <div className="animate-overlay-in fixed inset-0 z-50 flex items-center justify-center bg-zinc-900/40 p-6 backdrop-blur-sm dark:bg-black/60">
+      <div className="animate-panel-in flex max-h-[85vh] w-full max-w-lg flex-col overflow-hidden rounded-[28px] border border-white/70 bg-white/95 shadow-[0_24px_70px_-12px_rgba(15,15,25,0.35)] ring-1 ring-black/[0.03] backdrop-blur-2xl dark:border-white/10 dark:bg-zinc-900/90 dark:shadow-[0_24px_70px_-12px_rgba(0,0,0,0.6)]">
+        <div className="flex items-center justify-between border-b border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <h2 className="text-[15px] font-semibold tracking-tight text-zinc-800 dark:text-zinc-100">
+            Regeln verwalten
+          </h2>
+          <button
+            onClick={onClose}
+            className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+          >
+            <X size={16} />
+          </button>
+        </div>
+
+        <div className="flex-1 space-y-4 overflow-y-auto px-6 py-5">
+          <form onSubmit={handleAdd} className="space-y-2.5 rounded-2xl border border-zinc-200/80 bg-zinc-50/60 p-3.5 dark:border-zinc-800 dark:bg-zinc-950/40">
+            <p className="text-[11px] font-semibold tracking-wide text-zinc-400 uppercase">Neue Regel</p>
+            <Field label="Konto">
+              <select
+                className={inputClass}
+                value={accountId}
+                onChange={(e) => {
+                  setAccountId(e.target.value)
+                  const nowPop3 = accounts.find((a) => a.id === e.target.value)?.protocol === 'pop3'
+                  if (nowPop3 && action === 'move_to') setAction('mark_read')
+                }}
+              >
+                <option value="">Alle Konten</option>
+                {ruleAccounts.map((a) => (
+                  <option key={a.id} value={a.id}>
+                    {a.label}
+                    {a.protocol === 'pop3' ? ' (POP3)' : ''}
+                  </option>
+                ))}
+              </select>
+            </Field>
+
+            <div className="space-y-1.5">
+              <div className="flex items-center justify-between">
+                <span className="text-[11.5px] font-medium text-zinc-500 dark:text-zinc-400">Bedingungen</span>
+                {conditions.length > 1 && (
+                  <div className="flex rounded-lg bg-zinc-200/60 p-0.5 text-[11px] dark:bg-zinc-800/60">
+                    <button
+                      type="button"
+                      onClick={() => setMatchType('all')}
+                      className={`rounded-md px-2 py-0.5 transition ${matchType === 'all' ? 'bg-white font-medium text-zinc-800 shadow-sm dark:bg-zinc-700 dark:text-zinc-100' : 'text-zinc-500'}`}
+                    >
+                      Alle (UND)
+                    </button>
+                    <button
+                      type="button"
+                      onClick={() => setMatchType('any')}
+                      className={`rounded-md px-2 py-0.5 transition ${matchType === 'any' ? 'bg-white font-medium text-zinc-800 shadow-sm dark:bg-zinc-700 dark:text-zinc-100' : 'text-zinc-500'}`}
+                    >
+                      Eine (ODER)
+                    </button>
+                  </div>
+                )}
+              </div>
+              {conditions.map((c, i) => (
+                <div key={i} className="flex gap-2">
+                  <select
+                    className={`${inputClass} w-28 shrink-0`}
+                    value={c.field}
+                    onChange={(e) => updateCondition(i, { field: e.target.value })}
+                  >
+                    <option value="from">Absender</option>
+                    <option value="subject">Betreff</option>
+                  </select>
+                  <input
+                    className={`${inputClass} flex-1`}
+                    value={c.contains}
+                    onChange={(e) => updateCondition(i, { contains: e.target.value })}
+                    placeholder="z. B. newsletter@ oder Rechnung"
+                  />
+                  <button
+                    type="button"
+                    onClick={() => removeCondition(i)}
+                    disabled={conditions.length === 1}
+                    className="shrink-0 rounded-lg p-1.5 text-zinc-400 transition hover:bg-red-50 hover:text-red-600 disabled:opacity-30 dark:hover:bg-red-950/40"
+                  >
+                    <Trash2 size={13} />
+                  </button>
+                </div>
+              ))}
+              <button
+                type="button"
+                onClick={addCondition}
+                className="flex items-center gap-1 text-[11.5px] font-medium text-indigo-600 transition hover:text-indigo-700 dark:text-indigo-400"
+              >
+                <Plus size={12} /> Bedingung hinzufügen
+              </button>
+            </div>
+
+            <div className="grid grid-cols-2 gap-2.5">
+              <Field label="Aktion">
+                <select className={inputClass} value={action} onChange={(e) => setAction(e.target.value as RuleAction)}>
+                  {!isPop3 && <option value="move_to">In Ordner verschieben</option>}
+                  <option value="mark_read">Als gelesen markieren</option>
+                  <option value="flag">Markieren</option>
+                  <option value="delete">Löschen</option>
+                </select>
+                {isPop3 && (
+                  <p className="mt-1 text-[10.5px] text-zinc-400">
+                    POP3 hat keine Server-Ordner, „Verschieben“ ist daher nicht verfügbar.
+                  </p>
+                )}
+              </Field>
+              {action === 'move_to' && (
+                <Field label="Zielordner">
+                  <select
+                    className={inputClass}
+                    value={actionValue}
+                    onChange={(e) => setActionValue(e.target.value)}
+                    disabled={!accountId}
+                  >
+                    <option value="">{accountId ? 'Ordner wählen…' : 'Erst Konto wählen'}</option>
+                    {targetFolders.map((f) => (
+                      <option key={f.name} value={f.name}>
+                        {f.display_name}
+                      </option>
+                    ))}
+                  </select>
+                </Field>
+              )}
+            </div>
+            <button
+              type="submit"
+              disabled={saving || validConditions.length === 0 || (action === 'move_to' && !actionValue)}
+              className="w-full rounded-full bg-gradient-to-b from-indigo-500 to-indigo-600 py-2 text-[13px] font-medium text-white shadow-lg shadow-indigo-600/25 transition hover:from-indigo-400 hover:to-indigo-500 disabled:opacity-60"
+            >
+              {saving ? 'Speichere…' : 'Regel hinzufügen'}
+            </button>
+          </form>
+
+          <div>
+            <p className="mb-1.5 text-[11px] font-semibold tracking-wide text-zinc-400 uppercase">
+              Aktive Regeln
+            </p>
+            {loading ? (
+              <p className="text-xs text-zinc-400">Lade…</p>
+            ) : rules.length === 0 ? (
+              <p className="text-xs text-zinc-400">Noch keine Regeln angelegt.</p>
+            ) : (
+              <div className="space-y-1.5">
+                {rules.map((r) => (
+                  <div
+                    key={r.id}
+                    className="flex items-center gap-2.5 rounded-xl border border-zinc-200/80 px-3 py-2 dark:border-zinc-800"
+                  >
+                    <input
+                      type="checkbox"
+                      checked={r.enabled}
+                      onChange={() => handleToggle(r)}
+                      className="rounded border-zinc-300"
+                    />
+                    <div className="min-w-0 flex-1 text-[12.5px] text-zinc-700 dark:text-zinc-300">
+                      <span className="font-medium">{conditionsSummary(r.conditions, r.match_type)}</span>
+                      {' → '}
+                      {actionLabel(r, accountFolders)}
+                      {r.account_id && (
+                        <span className="text-zinc-400">
+                          {' '}
+                          ({accounts.find((a) => a.id === r.account_id)?.label ?? '?'})
+                        </span>
+                      )}
+                    </div>
+                    <button
+                      onClick={() => handleDelete(r)}
+                      className="shrink-0 rounded-full p-1 text-zinc-400 transition hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-950/40"
+                    >
+                      <Trash2 size={13} />
+                    </button>
+                  </div>
+                ))}
+              </div>
+            )}
+          </div>
+        </div>
+      </div>
+    </div>
+  )
+}
diff --git a/src/components/SettingsModal.tsx b/src/components/SettingsModal.tsx
new file mode 100644
index 0000000..6e0f9b6
--- /dev/null
+++ b/src/components/SettingsModal.tsx
@@ -0,0 +1,90 @@
+import { Bell, MonitorSmartphone, PictureInPicture2, X } from 'lucide-react'
+import type { AppSettings } from '../lib/settings'
+
+export function SettingsModal({
+  open,
+  settings,
+  onChange,
+  onClose,
+}: {
+  open: boolean
+  settings: AppSettings
+  onChange: (v: AppSettings) => void
+  onClose: () => void
+}) {
+  if (!open) return null
+
+  return (
+    <div className="animate-overlay-in fixed inset-0 z-50 flex items-center justify-center bg-zinc-900/40 p-6 backdrop-blur-sm dark:bg-black/60">
+      <div className="animate-panel-in flex w-full max-w-md flex-col overflow-hidden rounded-[28px] border border-white/70 bg-white/95 shadow-[0_24px_70px_-12px_rgba(15,15,25,0.35)] ring-1 ring-black/[0.03] backdrop-blur-2xl dark:border-white/10 dark:bg-zinc-900/90 dark:shadow-[0_24px_70px_-12px_rgba(0,0,0,0.6)]">
+        <div className="flex items-center justify-between border-b border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <h2 className="text-[15px] font-semibold tracking-tight text-zinc-800 dark:text-zinc-100">
+            Einstellungen
+          </h2>
+          <button
+            onClick={onClose}
+            className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+          >
+            <X size={16} />
+          </button>
+        </div>
+
+        <div className="space-y-4 px-6 py-5">
+          <div>
+            <p className="mb-2 text-[11px] font-semibold tracking-wide text-zinc-400 uppercase">
+              Benachrichtigungen bei neuer E-Mail
+            </p>
+            <div className="space-y-2.5">
+              <label className="flex items-center justify-between gap-3 rounded-xl border border-zinc-200/80 px-3.5 py-2.5 dark:border-zinc-800">
+                <span className="flex items-center gap-2.5 text-[13px] text-zinc-700 dark:text-zinc-200">
+                  <Bell size={15} className="text-zinc-400" />
+                  Popup in der App anzeigen
+                </span>
+                <input
+                  type="checkbox"
+                  checked={settings.popup}
+                  onChange={(e) => onChange({ ...settings, popup: e.target.checked })}
+                  className="h-4 w-4 rounded border-zinc-300"
+                />
+              </label>
+              <label className="flex items-center justify-between gap-3 rounded-xl border border-zinc-200/80 px-3.5 py-2.5 dark:border-zinc-800">
+                <span className="flex items-center gap-2.5 text-[13px] text-zinc-700 dark:text-zinc-200">
+                  <MonitorSmartphone size={15} className="text-zinc-400" />
+                  Desktop-Benachrichtigung anzeigen
+                </span>
+                <input
+                  type="checkbox"
+                  checked={settings.desktop}
+                  onChange={(e) => onChange({ ...settings, desktop: e.target.checked })}
+                  className="h-4 w-4 rounded border-zinc-300"
+                />
+              </label>
+            </div>
+            <p className="mt-2 text-[11px] text-zinc-400">
+              Beide lassen sich unabhängig voneinander abschalten, um keine Benachrichtigungen mehr zu erhalten.
+            </p>
+          </div>
+
+          <div>
+            <p className="mb-2 text-[11px] font-semibold tracking-wide text-zinc-400 uppercase">Verfassen</p>
+            <label className="flex items-center justify-between gap-3 rounded-xl border border-zinc-200/80 px-3.5 py-2.5 dark:border-zinc-800">
+              <span className="flex items-center gap-2.5 text-[13px] text-zinc-700 dark:text-zinc-200">
+                <PictureInPicture2 size={15} className="text-zinc-400" />
+                Neu/Antworten als Popup-Fenster öffnen
+              </span>
+              <input
+                type="checkbox"
+                checked={settings.composePopup}
+                onChange={(e) => onChange({ ...settings, composePopup: e.target.checked })}
+                className="h-4 w-4 rounded border-zinc-300"
+              />
+            </label>
+            <p className="mt-2 text-[11px] text-zinc-400">
+              Aus: Verfassen ersetzt die Lesefläche (Standard). An: Verfassen öffnet als schwebendes Fenster, die Nachrichtenliste bleibt sichtbar.
+            </p>
+          </div>
+        </div>
+      </div>
+    </div>
+  )
+}
diff --git a/src/components/ShortcutsModal.tsx b/src/components/ShortcutsModal.tsx
new file mode 100644
index 0000000..c4ad1ec
--- /dev/null
+++ b/src/components/ShortcutsModal.tsx
@@ -0,0 +1,51 @@
+import { X } from 'lucide-react'
+
+const SHORTCUTS: { keys: string; label: string }[] = [
+  { keys: 'N', label: 'Neue Mail verfassen' },
+  { keys: 'R', label: 'Antworten' },
+  { keys: 'F', label: 'Weiterleiten' },
+  { keys: 'Entf / Rücktaste', label: 'Ausgewählte Nachricht löschen' },
+  { keys: '↑ / ↓', label: 'In der Mailliste navigieren' },
+  { keys: 'Strg/Cmd + Klick', label: 'Mehrfachauswahl (einzelne Nachrichten)' },
+  { keys: 'Umschalt + Klick', label: 'Bereich auswählen' },
+  { keys: 'Rechtsklick', label: 'Kontextmenü öffnen (Mails, Kontakte, Ordner, Termine)' },
+  { keys: 'Esc', label: 'Menü/Popup schließen' },
+  { keys: '?', label: 'Diese Übersicht anzeigen' },
+]
+
+export function ShortcutsModal({ open, onClose }: { open: boolean; onClose: () => void }) {
+  if (!open) return null
+  return (
+    <div
+      className="animate-overlay-in fixed inset-0 z-50 flex items-center justify-center bg-zinc-900/40 p-6 backdrop-blur-sm dark:bg-black/60"
+      onClick={onClose}
+    >
+      <div
+        onClick={(e) => e.stopPropagation()}
+        className="animate-panel-in flex w-full max-w-sm flex-col overflow-hidden rounded-[28px] border border-white/70 bg-white/95 shadow-[0_24px_70px_-12px_rgba(15,15,25,0.35)] ring-1 ring-black/[0.03] backdrop-blur-2xl dark:border-white/10 dark:bg-zinc-900/90 dark:shadow-[0_24px_70px_-12px_rgba(0,0,0,0.6)]"
+      >
+        <div className="flex items-center justify-between border-b border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <h2 className="text-[15px] font-semibold tracking-tight text-zinc-800 dark:text-zinc-100">
+            Tastenkürzel
+          </h2>
+          <button
+            onClick={onClose}
+            className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+          >
+            <X size={16} />
+          </button>
+        </div>
+        <div className="flex-1 space-y-1.5 px-6 py-5">
+          {SHORTCUTS.map((s) => (
+            <div key={s.keys} className="flex items-center justify-between gap-3 py-0.5">
+              <span className="text-[12.5px] text-zinc-600 dark:text-zinc-300">{s.label}</span>
+              <kbd className="shrink-0 rounded-lg border border-zinc-200 bg-zinc-50 px-2 py-1 text-[11px] font-medium text-zinc-500 dark:border-zinc-700 dark:bg-zinc-800 dark:text-zinc-400">
+                {s.keys}
+              </kbd>
+            </div>
+          ))}
+        </div>
+      </div>
+    </div>
+  )
+}
diff --git a/src/components/Sidebar.tsx b/src/components/Sidebar.tsx
new file mode 100644
index 0000000..a584364
--- /dev/null
+++ b/src/components/Sidebar.tsx
@@ -0,0 +1,496 @@
+import { useState } from 'react'
+import {
+  Calendar,
+  ChevronRight,
+  Download,
+  Filter,
+  Folder as FolderIcon,
+  HardDrive,
+  Inbox,
+  Layers,
+  ListTodo,
+  Mail,
+  MailSearch,
+  MoreHorizontal,
+  PenLine,
+  Plus,
+  RefreshCw,
+  Settings,
+  Star,
+  Upload,
+  Users,
+  X,
+} from 'lucide-react'
+import clsx from 'clsx'
+import type { Account, Folder } from '../types'
+import { Avatar } from './Avatar'
+import { Popover } from './Popover'
+
+export type SidebarView = 'mail' | 'contacts' | 'calendar' | 'tasks'
+
+export interface FavoriteFolder {
+  accountId: string
+  folder: string
+  label: string
+}
+
+export interface SavedSearch {
+  id: string
+  label: string
+  query: string
+}
+
+function folderIcon(name: string) {
+  const n = name.toLowerCase()
+  if (n.includes('inbox') || n.includes('posteingang')) return Inbox
+  if (n.includes('entwürfe') || n.includes('entwuerfe') || n.includes('draft')) return PenLine
+  return FolderIcon
+}
+
+function FolderMenu({
+  onExport,
+  onImport,
+  onManageRules,
+  onFullBackup,
+}: {
+  onExport: () => void
+  onImport: () => void
+  onManageRules: () => void
+  onFullBackup: () => void
+}) {
+  const [open, setOpen] = useState(false)
+
+  return (
+    <Popover
+      open={open}
+      onOpenChange={setOpen}
+      trigger={
+        <button
+          title="Import / Export"
+          className="rounded-md p-1 text-zinc-400 transition hover:bg-zinc-200 hover:text-zinc-600 dark:hover:bg-zinc-800 dark:hover:text-zinc-300"
+        >
+          <MoreHorizontal size={14} />
+        </button>
+      }
+      panelClassName="animate-panel-in w-56 overflow-hidden rounded-2xl border border-zinc-200/80 bg-white/95 py-1.5 shadow-xl backdrop-blur-xl dark:border-zinc-800 dark:bg-zinc-900/95"
+    >
+      <button
+        onClick={() => {
+          setOpen(false)
+          onExport()
+        }}
+        className="flex w-full items-center gap-2.5 px-3 py-1.5 text-left text-[12.5px] text-zinc-700 transition hover:bg-indigo-50 hover:text-indigo-700 dark:text-zinc-300 dark:hover:bg-indigo-500/10 dark:hover:text-indigo-300"
+      >
+        <Download size={13} /> Ordner exportieren (.mbox)
+      </button>
+      <button
+        onClick={() => {
+          setOpen(false)
+          onImport()
+        }}
+        className="flex w-full items-center gap-2.5 px-3 py-1.5 text-left text-[12.5px] text-zinc-700 transition hover:bg-indigo-50 hover:text-indigo-700 dark:text-zinc-300 dark:hover:bg-indigo-500/10 dark:hover:text-indigo-300"
+      >
+        <Upload size={13} /> Mail importieren…
+      </button>
+      <div className="my-1 h-px bg-zinc-100 dark:bg-zinc-800" />
+      <button
+        onClick={() => {
+          setOpen(false)
+          onFullBackup()
+        }}
+        className="flex w-full items-center gap-2.5 px-3 py-1.5 text-left text-[12.5px] text-zinc-700 transition hover:bg-indigo-50 hover:text-indigo-700 dark:text-zinc-300 dark:hover:bg-indigo-500/10 dark:hover:text-indigo-300"
+      >
+        <HardDrive size={13} /> Komplettes Postfach sichern…
+      </button>
+      <div className="my-1 h-px bg-zinc-100 dark:bg-zinc-800" />
+      <button
+        onClick={() => {
+          setOpen(false)
+          onManageRules()
+        }}
+        className="flex w-full items-center gap-2.5 px-3 py-1.5 text-left text-[12.5px] text-zinc-700 transition hover:bg-indigo-50 hover:text-indigo-700 dark:text-zinc-300 dark:hover:bg-indigo-500/10 dark:hover:text-indigo-300"
+      >
+        <Filter size={13} /> Regeln verwalten…
+      </button>
+    </Popover>
+  )
+}
+
+function FolderRow({
+  folder,
+  active,
+  isFavorite,
+  onSelect,
+  onToggleFavorite,
+  onContextMenu,
+  onDropMessages,
+  compact,
+}: {
+  folder: Folder
+  active: boolean
+  isFavorite: boolean
+  onSelect: () => void
+  onToggleFavorite: () => void
+  onContextMenu?: (e: React.MouseEvent) => void
+  onDropMessages?: () => void
+  compact: boolean
+}) {
+  const Icon = folderIcon(folder.name)
+  const [dragOver, setDragOver] = useState(false)
+  return (
+    <button
+      onClick={onSelect}
+      onContextMenu={onContextMenu}
+      onDragOver={(e) => {
+        if (!onDropMessages) return
+        e.preventDefault()
+        e.dataTransfer.dropEffect = 'move'
+      }}
+      onDragEnter={(e) => {
+        if (!onDropMessages) return
+        e.preventDefault()
+        setDragOver(true)
+      }}
+      onDragLeave={() => setDragOver(false)}
+      onDrop={(e) => {
+        if (!onDropMessages) return
+        e.preventDefault()
+        setDragOver(false)
+        onDropMessages()
+      }}
+      className={clsx(
+        'group flex w-full items-center gap-2.5 rounded-xl px-2.5 text-left text-[13px] transition',
+        compact ? 'py-1' : 'py-1.5',
+        dragOver
+          ? 'bg-indigo-100 ring-2 ring-indigo-400 dark:bg-indigo-500/25'
+          : active
+            ? 'bg-white font-medium text-indigo-700 shadow-sm ring-1 ring-black/[0.04] dark:bg-indigo-500/15 dark:text-indigo-300 dark:ring-white/5'
+            : 'text-zinc-600 hover:bg-white/60 dark:text-zinc-400 dark:hover:bg-zinc-800/60',
+      )}
+    >
+      <Icon size={15} className="shrink-0" />
+      <span className="flex-1 truncate">{folder.display_name}</span>
+      <span
+        role="button"
+        onClick={(e) => {
+          e.stopPropagation()
+          onToggleFavorite()
+        }}
+        className={clsx(
+          'shrink-0 rounded-full p-0.5 transition',
+          isFavorite ? 'text-amber-400' : 'text-zinc-300 opacity-0 group-hover:opacity-100 hover:text-amber-400 dark:text-zinc-700',
+        )}
+      >
+        <Star size={12} fill={isFavorite ? 'currentColor' : 'none'} />
+      </span>
+      {folder.unread > 0 && (
+        <span
+          className={clsx(
+            'shrink-0 rounded-full px-1.5 py-0.5 text-[10.5px] font-semibold tabular-nums',
+            active ? 'bg-indigo-600 text-white' : 'bg-zinc-200 text-zinc-600 dark:bg-zinc-800 dark:text-zinc-300',
+          )}
+        >
+          {folder.unread > 99 ? '99+' : folder.unread}
+        </span>
+      )}
+    </button>
+  )
+}
+
+export function Sidebar({
+  accounts,
+  accountFolders,
+  expandedAccounts,
+  onToggleExpand,
+  selectedAccountId,
+  selectedFolder,
+  onSelectFolder,
+  favorites,
+  onToggleFavorite,
+  onFolderContextMenu,
+  onDropMessagesOnFolder,
+  onAddAccount,
+  onRefresh,
+  refreshing,
+  view,
+  onChangeView,
+  onExportFolder,
+  onFullBackup,
+  onOpenImport,
+  onManageRules,
+  onOpenAccountSettings,
+  compact,
+  savedSearches,
+  onSelectSavedSearch,
+  onDeleteSavedSearch,
+  unifiedInboxActive,
+  onSelectUnifiedInbox,
+}: {
+  accounts: Account[]
+  accountFolders: Record<string, Folder[]>
+  expandedAccounts: Set<string>
+  onToggleExpand: (accountId: string) => void
+  selectedAccountId: string | null
+  selectedFolder: string | null
+  onSelectFolder: (accountId: string, folderName: string) => void
+  favorites: FavoriteFolder[]
+  onToggleFavorite: (accountId: string, folder: Folder) => void
+  onFolderContextMenu?: (e: React.MouseEvent, accountId: string, folder: Folder) => void
+  onDropMessagesOnFolder?: (accountId: string, folder: Folder) => void
+  onAddAccount: () => void
+  onRefresh: () => void
+  refreshing: boolean
+  view: SidebarView
+  onChangeView: (v: SidebarView) => void
+  onExportFolder: () => void
+  onFullBackup: () => void
+  onOpenImport: () => void
+  onManageRules: () => void
+  onOpenAccountSettings: (account: Account) => void
+  compact: boolean
+  savedSearches: SavedSearch[]
+  onSelectSavedSearch: (query: string) => void
+  onDeleteSavedSearch: (id: string) => void
+  unifiedInboxActive: boolean
+  onSelectUnifiedInbox: () => void
+}) {
+  const isFavorite = (accountId: string, folder: string) =>
+    favorites.some((f) => f.accountId === accountId && f.folder === folder)
+
+  return (
+    <aside className="flex h-full w-64 shrink-0 flex-col border-r border-zinc-200/80 bg-gradient-to-b from-zinc-50 to-zinc-100/60 dark:border-zinc-800/80 dark:from-zinc-950 dark:to-zinc-900/40">
+      <div className="px-3 pt-4">
+        <div className="flex rounded-xl bg-zinc-200/60 p-1 dark:bg-zinc-900/60">
+          <button
+            onClick={() => onChangeView('mail')}
+            title="Mail"
+            className={clsx(
+              'flex flex-1 items-center justify-center gap-1.5 rounded-lg py-1.5 text-[12px] font-medium transition',
+              view === 'mail'
+                ? 'bg-white text-zinc-800 shadow-sm dark:bg-zinc-800 dark:text-zinc-100'
+                : 'text-zinc-500 hover:text-zinc-700 dark:text-zinc-500 dark:hover:text-zinc-300',
+            )}
+          >
+            <Mail size={13} />
+          </button>
+          <button
+            onClick={() => onChangeView('contacts')}
+            title="Kontakte"
+            className={clsx(
+              'flex flex-1 items-center justify-center gap-1.5 rounded-lg py-1.5 text-[12px] font-medium transition',
+              view === 'contacts'
+                ? 'bg-white text-zinc-800 shadow-sm dark:bg-zinc-800 dark:text-zinc-100'
+                : 'text-zinc-500 hover:text-zinc-700 dark:text-zinc-500 dark:hover:text-zinc-300',
+            )}
+          >
+            <Users size={13} />
+          </button>
+          <button
+            onClick={() => onChangeView('calendar')}
+            title="Kalender"
+            className={clsx(
+              'flex flex-1 items-center justify-center gap-1.5 rounded-lg py-1.5 text-[12px] font-medium transition',
+              view === 'calendar'
+                ? 'bg-white text-zinc-800 shadow-sm dark:bg-zinc-800 dark:text-zinc-100'
+                : 'text-zinc-500 hover:text-zinc-700 dark:text-zinc-500 dark:hover:text-zinc-300',
+            )}
+          >
+            <Calendar size={13} />
+          </button>
+          <button
+            onClick={() => onChangeView('tasks')}
+            title="Aufgaben"
+            className={clsx(
+              'flex flex-1 items-center justify-center gap-1.5 rounded-lg py-1.5 text-[12px] font-medium transition',
+              view === 'tasks'
+                ? 'bg-white text-zinc-800 shadow-sm dark:bg-zinc-800 dark:text-zinc-100'
+                : 'text-zinc-500 hover:text-zinc-700 dark:text-zinc-500 dark:hover:text-zinc-300',
+            )}
+          >
+            <ListTodo size={13} />
+          </button>
+        </div>
+      </div>
+
+      {view === 'mail' && (
+        <div className="mt-4 flex-1 overflow-y-auto px-3 pb-3">
+          <button
+            onClick={onSelectUnifiedInbox}
+            className={clsx(
+              'mb-3 flex w-full items-center gap-2.5 rounded-xl px-2.5 py-2 text-left text-[13px] font-medium transition',
+              unifiedInboxActive
+                ? 'bg-white text-indigo-700 shadow-sm ring-1 ring-black/[0.04] dark:bg-indigo-500/15 dark:text-indigo-300 dark:ring-white/5'
+                : 'text-zinc-600 hover:bg-white/60 dark:text-zinc-400 dark:hover:bg-zinc-800/60',
+            )}
+          >
+            <Layers size={15} className="shrink-0" />
+            Alle Posteingänge
+          </button>
+
+          {favorites.length > 0 && (
+            <div className="mb-4">
+              <div className="flex items-center justify-between px-1 pb-1.5">
+                <span className="text-[11px] font-semibold tracking-wide text-zinc-400 uppercase dark:text-zinc-500">
+                  Favoriten
+                </span>
+              </div>
+              <nav className="flex flex-col gap-0.5">
+                {favorites.map((f) => {
+                  const folders = accountFolders[f.accountId] ?? []
+                  const folder = folders.find((x) => x.name === f.folder)
+                  if (!folder) return null
+                  return (
+                    <FolderRow
+                      key={`${f.accountId}-${f.folder}`}
+                      folder={folder}
+                      active={selectedAccountId === f.accountId && selectedFolder === f.folder}
+                      isFavorite
+                      onSelect={() => onSelectFolder(f.accountId, f.folder)}
+                      onToggleFavorite={() => onToggleFavorite(f.accountId, folder)}
+                      onContextMenu={(e) => onFolderContextMenu?.(e, f.accountId, folder)}
+                      onDropMessages={() => onDropMessagesOnFolder?.(f.accountId, folder)}
+                      compact={compact}
+                    />
+                  )
+                })}
+              </nav>
+            </div>
+          )}
+
+          {savedSearches.length > 0 && (
+            <div className="mb-4">
+              <div className="flex items-center justify-between px-1 pb-1.5">
+                <span className="text-[11px] font-semibold tracking-wide text-zinc-400 uppercase dark:text-zinc-500">
+                  Suchordner
+                </span>
+              </div>
+              <nav className="flex flex-col gap-0.5">
+                {savedSearches.map((s) => (
+                  <button
+                    key={s.id}
+                    onClick={() => onSelectSavedSearch(s.query)}
+                    className="group flex w-full items-center gap-2.5 rounded-xl px-2.5 py-1.5 text-left text-[13px] text-zinc-600 transition hover:bg-white/60 dark:text-zinc-400 dark:hover:bg-zinc-800/60"
+                  >
+                    <MailSearch size={15} className="shrink-0" />
+                    <span className="flex-1 truncate">{s.label}</span>
+                    <span
+                      role="button"
+                      onClick={(e) => {
+                        e.stopPropagation()
+                        onDeleteSavedSearch(s.id)
+                      }}
+                      className="shrink-0 rounded-full p-0.5 text-zinc-300 opacity-0 transition group-hover:opacity-100 hover:text-red-500 dark:text-zinc-700"
+                    >
+                      <X size={12} />
+                    </span>
+                  </button>
+                ))}
+              </nav>
+            </div>
+          )}
+
+          <div className="flex items-center justify-between px-1 pb-1.5">
+            <span className="text-[11px] font-semibold tracking-wide text-zinc-400 uppercase dark:text-zinc-500">
+              Konten
+            </span>
+            <div className="flex items-center gap-0.5">
+              <button
+                onClick={onRefresh}
+                disabled={!selectedAccountId || refreshing}
+                title="Aktualisieren"
+                className="rounded-md p-1 text-zinc-400 transition hover:bg-zinc-200 hover:text-zinc-600 disabled:opacity-40 dark:hover:bg-zinc-800 dark:hover:text-zinc-300"
+              >
+                <RefreshCw size={13} className={clsx(refreshing && 'animate-spin')} />
+              </button>
+              <FolderMenu onExport={onExportFolder} onImport={onOpenImport} onManageRules={onManageRules} onFullBackup={onFullBackup} />
+              <button
+                onClick={onAddAccount}
+                title="Konto hinzufügen"
+                className="rounded-full p-1 text-zinc-400 transition hover:bg-zinc-200 hover:text-zinc-600 dark:hover:bg-zinc-800 dark:hover:text-zinc-300"
+              >
+                <Plus size={14} />
+              </button>
+            </div>
+          </div>
+
+          <div className="flex flex-col gap-2.5">
+            {[...accounts]
+              .sort((a, b) => (a.protocol === 'local' ? 1 : 0) - (b.protocol === 'local' ? 1 : 0))
+              .map((a) => {
+              const expanded = expandedAccounts.has(a.id)
+              const folders = accountFolders[a.id] ?? []
+              return (
+                <div key={a.id} className="group/account">
+                  <div className="flex w-full items-center gap-1.5 rounded-lg px-1 py-1 transition hover:bg-white/50 dark:hover:bg-zinc-800/50">
+                    <button
+                      onClick={() => onToggleExpand(a.id)}
+                      className="flex min-w-0 flex-1 items-center gap-1.5 text-left"
+                    >
+                      <ChevronRight
+                        size={13}
+                        className={clsx('shrink-0 text-zinc-400 transition-transform', expanded && 'rotate-90')}
+                      />
+                      {a.protocol === 'local' ? (
+                        <div className="flex h-5 w-5 shrink-0 items-center justify-center rounded-full bg-zinc-300 text-zinc-600 dark:bg-zinc-700 dark:text-zinc-300">
+                          <HardDrive size={11} />
+                        </div>
+                      ) : (
+                        <Avatar name={a.label || a.email} size={20} />
+                      )}
+                      <span className="min-w-0 flex-1 truncate text-[12px] font-medium text-zinc-600 dark:text-zinc-300">
+                        {a.label}
+                      </span>
+                    </button>
+                    {a.protocol !== 'local' && (
+                      <button
+                        onClick={(e) => {
+                          e.stopPropagation()
+                          onOpenAccountSettings(a)
+                        }}
+                        title="Kontoeinstellungen"
+                        className="shrink-0 rounded-md p-1 text-zinc-300 opacity-0 transition group-hover/account:opacity-100 hover:bg-zinc-200 hover:text-zinc-600 dark:text-zinc-600 dark:hover:bg-zinc-800 dark:hover:text-zinc-300"
+                      >
+                        <Settings size={12} />
+                      </button>
+                    )}
+                  </div>
+                  {expanded && (
+                    <nav className="mt-0.5 flex flex-col gap-0.5 pl-3">
+                      {folders.map((f) => (
+                        <FolderRow
+                          key={f.name}
+                          folder={f}
+                          active={selectedAccountId === a.id && selectedFolder === f.name}
+                          isFavorite={isFavorite(a.id, f.name)}
+                          onSelect={() => onSelectFolder(a.id, f.name)}
+                          onToggleFavorite={() => onToggleFavorite(a.id, f)}
+                          onContextMenu={(e) => onFolderContextMenu?.(e, a.id, f)}
+                          onDropMessages={() => onDropMessagesOnFolder?.(a.id, f)}
+                          compact={compact}
+                        />
+                      ))}
+                      {folders.length === 0 && (
+                        <p className="px-2.5 py-1.5 text-xs text-zinc-400">Lade Ordner…</p>
+                      )}
+                    </nav>
+                  )}
+                </div>
+              )
+            })}
+            {accounts.length === 0 && (
+              <button
+                onClick={onAddAccount}
+                className="rounded-xl border border-dashed border-zinc-300 px-2.5 py-2.5 text-left text-xs text-zinc-500 transition hover:border-indigo-300 hover:bg-white/50 hover:text-indigo-600 dark:border-zinc-700 dark:text-zinc-500 dark:hover:border-indigo-800"
+              >
+                Erstes Konto hinzufügen…
+              </button>
+            )}
+          </div>
+        </div>
+      )}
+      {view === 'contacts' && <div className="flex-1" />}
+      {view === 'calendar' && <div className="flex-1" />}
+      {view === 'tasks' && <div className="flex-1" />}
+    </aside>
+  )
+}
diff --git a/src/components/SnoozedModal.tsx b/src/components/SnoozedModal.tsx
new file mode 100644
index 0000000..6f73379
--- /dev/null
+++ b/src/components/SnoozedModal.tsx
@@ -0,0 +1,99 @@
+import { useEffect, useState } from 'react'
+import { BellRing, X } from 'lucide-react'
+import { api } from '../lib/api'
+import type { MessageSummary, SnoozedMessage } from '../types'
+
+export function SnoozedModal({
+  open,
+  onClose,
+  onToast,
+  onOpenMessage,
+}: {
+  open: boolean
+  onClose: () => void
+  onToast: (msg: string) => void
+  onOpenMessage: (m: MessageSummary) => void
+}) {
+  const [items, setItems] = useState<SnoozedMessage[]>([])
+  const [loading, setLoading] = useState(false)
+
+  function refresh() {
+    setLoading(true)
+    api
+      .listSnoozedMessages()
+      .then(setItems)
+      .catch((e) => onToast(`Liste konnte nicht geladen werden: ${e}`))
+      .finally(() => setLoading(false))
+  }
+
+  useEffect(() => {
+    if (open) refresh()
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [open])
+
+  if (!open) return null
+
+  async function handleUnsnooze(m: SnoozedMessage) {
+    setItems((prev) => prev.filter((x) => x !== m))
+    try {
+      await api.unsnoozeMessage(m.account_id, m.folder, m.uid)
+    } catch (e) {
+      onToast(String(e))
+    }
+  }
+
+  return (
+    <div className="animate-overlay-in fixed inset-0 z-50 flex items-center justify-center bg-zinc-900/40 p-6 backdrop-blur-sm dark:bg-black/60">
+      <div className="animate-panel-in flex max-h-[80vh] w-full max-w-md flex-col overflow-hidden rounded-[28px] border border-white/70 bg-white/95 shadow-[0_24px_70px_-12px_rgba(15,15,25,0.35)] ring-1 ring-black/[0.03] backdrop-blur-2xl dark:border-white/10 dark:bg-zinc-900/90 dark:shadow-[0_24px_70px_-12px_rgba(0,0,0,0.6)]">
+        <div className="flex items-center justify-between border-b border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <h2 className="flex items-center gap-2 text-[15px] font-semibold tracking-tight text-zinc-800 dark:text-zinc-100">
+            <BellRing size={16} className="text-zinc-400" /> Wiedervorlage
+          </h2>
+          <button
+            onClick={onClose}
+            className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+          >
+            <X size={16} />
+          </button>
+        </div>
+
+        <div className="flex-1 space-y-1.5 overflow-y-auto px-6 py-5">
+          {loading ? (
+            <p className="text-xs text-zinc-400">Lade…</p>
+          ) : items.length === 0 ? (
+            <p className="text-xs text-zinc-400">Nichts auf Wiedervorlage.</p>
+          ) : (
+            items.map((m) => (
+              <div
+                key={`${m.account_id}-${m.folder}-${m.uid}`}
+                className="flex items-center gap-2.5 rounded-xl border border-zinc-200/80 px-3 py-2 dark:border-zinc-800"
+              >
+                <button
+                  onClick={() => {
+                    onOpenMessage(m)
+                    onClose()
+                  }}
+                  className="min-w-0 flex-1 text-left"
+                >
+                  <p className="truncate text-[12.5px] font-medium text-zinc-700 dark:text-zinc-300">
+                    {m.subject || '(kein Betreff)'}
+                  </p>
+                  <p className="truncate text-[11px] text-zinc-400">
+                    {m.from_name || m.from_addr} · wieder ab {new Date(m.until_ts * 1000).toLocaleString('de-DE')}
+                  </p>
+                </button>
+                <button
+                  onClick={() => handleUnsnooze(m)}
+                  title="Jetzt wiedervorlegen"
+                  className="shrink-0 rounded-full px-2.5 py-1 text-[11px] font-medium text-indigo-600 transition hover:bg-indigo-50 dark:text-indigo-400 dark:hover:bg-indigo-500/10"
+                >
+                  Jetzt zeigen
+                </button>
+              </div>
+            ))
+          )}
+        </div>
+      </div>
+    </div>
+  )
+}
diff --git a/src/components/TaskModal.tsx b/src/components/TaskModal.tsx
new file mode 100644
index 0000000..709270a
--- /dev/null
+++ b/src/components/TaskModal.tsx
@@ -0,0 +1,218 @@
+import { useEffect, useState } from 'react'
+import { Trash2, X } from 'lucide-react'
+import clsx from 'clsx'
+import type { NewTask, Task, TaskPriority } from '../types'
+
+function Field({ label, children }: { label: string; children: React.ReactNode }) {
+  return (
+    <label className="flex flex-col gap-1">
+      <span className="text-[11.5px] font-medium text-zinc-500 dark:text-zinc-400">{label}</span>
+      {children}
+    </label>
+  )
+}
+
+const inputClass =
+  'rounded-lg border border-zinc-200 bg-white px-3 py-1.5 text-[13px] text-zinc-800 outline-none transition focus:border-indigo-400 focus:ring-2 focus:ring-indigo-100 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-100 dark:focus:ring-indigo-500/20'
+
+const PRIORITIES: { value: TaskPriority; label: string; color: string }[] = [
+  { value: 'low', label: 'Niedrig', color: '#94a3b8' },
+  { value: 'normal', label: 'Normal', color: '#3b82f6' },
+  { value: 'high', label: 'Hoch', color: '#ef4444' },
+]
+
+function toDateStr(ts: number) {
+  const d = new Date(ts * 1000)
+  const y = d.getFullYear()
+  const m = String(d.getMonth() + 1).padStart(2, '0')
+  const day = String(d.getDate()).padStart(2, '0')
+  return `${y}-${m}-${day}`
+}
+
+export function TaskModal({
+  open,
+  task,
+  onClose,
+  onSave,
+  onDelete,
+}: {
+  open: boolean
+  task: Task | null
+  onClose: () => void
+  onSave: (data: NewTask, existingId: string | null) => Promise<void>
+  onDelete: (task: Task) => Promise<void>
+}) {
+  const [title, setTitle] = useState('')
+  const [description, setDescription] = useState('')
+  const [dueDate, setDueDate] = useState('')
+  const [priority, setPriority] = useState<TaskPriority>('normal')
+  const [saving, setSaving] = useState(false)
+  const [deleting, setDeleting] = useState(false)
+  const [confirmDelete, setConfirmDelete] = useState(false)
+
+  useEffect(() => {
+    if (!open) return
+    setConfirmDelete(false)
+    if (task) {
+      setTitle(task.title)
+      setDescription(task.description ?? '')
+      setDueDate(task.due_ts ? toDateStr(task.due_ts) : '')
+      setPriority(task.priority)
+    } else {
+      setTitle('')
+      setDescription('')
+      setDueDate('')
+      setPriority('normal')
+    }
+  }, [open, task])
+
+  if (!open) return null
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault()
+    if (!title.trim()) return
+    setSaving(true)
+    try {
+      const due_ts = dueDate ? Math.floor(new Date(`${dueDate}T09:00:00`).getTime() / 1000) : null
+      await onSave(
+        {
+          title: title.trim(),
+          description: description.trim() || undefined,
+          due_ts,
+          priority,
+        },
+        task?.id ?? null,
+      )
+    } finally {
+      setSaving(false)
+    }
+  }
+
+  async function handleDelete() {
+    if (!task) return
+    setDeleting(true)
+    try {
+      await onDelete(task)
+    } finally {
+      setDeleting(false)
+    }
+  }
+
+  return (
+    <div className="animate-overlay-in fixed inset-0 z-50 flex items-center justify-center bg-zinc-900/40 p-6 backdrop-blur-sm dark:bg-black/60">
+      <form
+        onSubmit={handleSubmit}
+        className="animate-panel-in flex max-h-[85vh] w-full max-w-md flex-col overflow-hidden rounded-[28px] border border-white/70 bg-white/95 shadow-[0_24px_70px_-12px_rgba(15,15,25,0.35)] ring-1 ring-black/[0.03] backdrop-blur-2xl dark:border-white/10 dark:bg-zinc-900/90 dark:shadow-[0_24px_70px_-12px_rgba(0,0,0,0.6)]"
+      >
+        <div className="flex items-center justify-between border-b border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <h2 className="text-[15px] font-semibold tracking-tight text-zinc-800 dark:text-zinc-100">
+            {task ? 'Aufgabe bearbeiten' : 'Neue Aufgabe'}
+          </h2>
+          <button
+            type="button"
+            onClick={onClose}
+            className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+          >
+            <X size={16} />
+          </button>
+        </div>
+
+        <div className="flex-1 space-y-3.5 overflow-y-auto px-6 py-5">
+          <Field label="Titel">
+            <input
+              className={inputClass}
+              value={title}
+              onChange={(e) => setTitle(e.target.value)}
+              placeholder="z. B. Angebot nachfassen"
+              autoFocus
+              required
+            />
+          </Field>
+
+          <div className="grid grid-cols-2 gap-3">
+            <Field label="Fällig am (optional)">
+              <input className={inputClass} type="date" value={dueDate} onChange={(e) => setDueDate(e.target.value)} />
+            </Field>
+            <Field label="Priorität">
+              <div className="flex items-center gap-1.5 pt-1">
+                {PRIORITIES.map((p) => (
+                  <button
+                    key={p.value}
+                    type="button"
+                    onClick={() => setPriority(p.value)}
+                    title={p.label}
+                    className={clsx(
+                      'flex h-7 w-7 items-center justify-center rounded-full border-2 transition',
+                      priority === p.value ? 'border-zinc-400 dark:border-zinc-300' : 'border-transparent',
+                    )}
+                  >
+                    <span className="h-3.5 w-3.5 rounded-full" style={{ backgroundColor: p.color }} />
+                  </button>
+                ))}
+              </div>
+            </Field>
+          </div>
+
+          <Field label="Beschreibung (optional)">
+            <textarea
+              value={description}
+              onChange={(e) => setDescription(e.target.value)}
+              rows={4}
+              className="w-full resize-none rounded-lg border border-zinc-200 bg-white px-3 py-2 text-[12.5px] text-zinc-700 outline-none focus:border-indigo-400 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-200"
+            />
+          </Field>
+
+          {task && (
+            <div className="rounded-2xl border border-red-100 bg-red-50/50 p-3 dark:border-red-950/60 dark:bg-red-950/20">
+              {confirmDelete ? (
+                <div className="flex items-center gap-2">
+                  <span className="text-[12px] text-red-700 dark:text-red-400">Aufgabe wirklich löschen?</span>
+                  <button
+                    type="button"
+                    onClick={handleDelete}
+                    disabled={deleting}
+                    className="ml-auto rounded-full bg-red-600 px-3 py-1 text-[11.5px] font-medium text-white transition hover:bg-red-500 disabled:opacity-60"
+                  >
+                    {deleting ? 'Lösche…' : 'Löschen'}
+                  </button>
+                  <button
+                    type="button"
+                    onClick={() => setConfirmDelete(false)}
+                    className="rounded-full px-3 py-1 text-[11.5px] font-medium text-zinc-500 hover:bg-zinc-100 dark:hover:bg-zinc-800"
+                  >
+                    Abbrechen
+                  </button>
+                </div>
+              ) : (
+                <button
+                  type="button"
+                  onClick={() => setConfirmDelete(true)}
+                  className="flex items-center gap-1.5 text-[12.5px] font-medium text-red-600 transition hover:text-red-700 dark:text-red-400"
+                >
+                  <Trash2 size={13} /> Aufgabe löschen
+                </button>
+              )}
+            </div>
+          )}
+        </div>
+
+        <div className="flex justify-end gap-2 border-t border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <button
+            type="button"
+            onClick={onClose}
+            className="rounded-full px-4 py-2 text-[13px] font-medium text-zinc-500 transition hover:bg-zinc-100 dark:hover:bg-zinc-800"
+          >
+            Abbrechen
+          </button>
+          <button
+            type="submit"
+            disabled={saving}
+            className="rounded-full bg-gradient-to-b from-indigo-500 to-indigo-600 px-5 py-2 text-[13px] font-medium text-white shadow-lg shadow-indigo-600/25 transition hover:from-indigo-400 hover:to-indigo-500 hover:shadow-indigo-600/35 active:scale-[0.98] disabled:opacity-60"
+          >
+            {saving ? 'Speichere…' : 'Speichern'}
+          </button>
+        </div>
+      </form>
+    </div>
+  )
+}
diff --git a/src/components/TasksView.tsx b/src/components/TasksView.tsx
new file mode 100644
index 0000000..c0943f7
--- /dev/null
+++ b/src/components/TasksView.tsx
@@ -0,0 +1,141 @@
+import { useMemo } from 'react'
+import { CheckSquare, ListTodo, Plus } from 'lucide-react'
+import clsx from 'clsx'
+import type { Task } from '../types'
+
+const PRIORITY_COLOR: Record<Task['priority'], string> = {
+  low: '#94a3b8',
+  normal: '#3b82f6',
+  high: '#ef4444',
+}
+
+function isOverdue(task: Task) {
+  if (!task.due_ts || task.completed) return false
+  return task.due_ts * 1000 < Date.now()
+}
+
+function formatDue(ts: number) {
+  const d = new Date(ts * 1000)
+  return d.toLocaleDateString('de-DE', { day: '2-digit', month: 'short' })
+}
+
+export function TasksView({
+  tasks,
+  loading,
+  onAdd,
+  onEdit,
+  onToggleCompleted,
+}: {
+  tasks: Task[]
+  loading: boolean
+  onAdd: () => void
+  onEdit: (task: Task) => void
+  onToggleCompleted: (task: Task) => void
+}) {
+  const open = useMemo(() => tasks.filter((t) => !t.completed), [tasks])
+  const completed = useMemo(() => tasks.filter((t) => t.completed), [tasks])
+
+  return (
+    <div className="flex min-w-0 flex-1 flex-col overflow-hidden">
+      <div className="flex items-center gap-3 border-b border-zinc-200/80 px-6 py-3.5 dark:border-zinc-800/80">
+        <h2 className="text-[15px] font-semibold tracking-tight text-zinc-800 dark:text-zinc-100">Aufgaben</h2>
+        <span className="text-[12px] text-zinc-400">{open.length} offen</span>
+        <button
+          onClick={onAdd}
+          className="ml-auto flex items-center gap-1.5 rounded-full bg-gradient-to-b from-indigo-500 to-indigo-600 px-3.5 py-1.5 text-[12.5px] font-medium text-white shadow-sm transition hover:from-indigo-400 hover:to-indigo-500"
+        >
+          <Plus size={13} /> Neue Aufgabe
+        </button>
+      </div>
+
+      <div className="flex-1 overflow-y-auto px-6 py-4">
+        {loading ? (
+          <p className="text-sm text-zinc-400">Lade…</p>
+        ) : tasks.length === 0 ? (
+          <div className="flex flex-1 flex-col items-center justify-center gap-3 py-20 text-center">
+            <div className="flex h-16 w-16 items-center justify-center rounded-full bg-zinc-100 text-zinc-300 dark:bg-zinc-900 dark:text-zinc-700">
+              <ListTodo size={26} strokeWidth={1.4} />
+            </div>
+            <p className="text-sm text-zinc-400">Noch keine Aufgaben angelegt.</p>
+          </div>
+        ) : (
+          <div className="space-y-6">
+            <div className="space-y-1">
+              {open.map((task) => (
+                <div
+                  key={task.id}
+                  onClick={() => onEdit(task)}
+                  role="button"
+                  className="group flex cursor-default items-start gap-3 rounded-xl px-3 py-2.5 transition hover:bg-zinc-50 dark:hover:bg-zinc-900/60"
+                >
+                  <button
+                    onClick={(e) => {
+                      e.stopPropagation()
+                      onToggleCompleted(task)
+                    }}
+                    className="mt-0.5 h-4 w-4 shrink-0 rounded-full border-2 border-zinc-300 transition hover:border-indigo-400 dark:border-zinc-600"
+                  />
+                  <span
+                    className="mt-1.5 h-2 w-2 shrink-0 rounded-full"
+                    style={{ backgroundColor: PRIORITY_COLOR[task.priority] }}
+                    title={task.priority}
+                  />
+                  <div className="min-w-0 flex-1">
+                    <p className="truncate text-[13px] font-medium text-zinc-800 dark:text-zinc-100">{task.title}</p>
+                    {task.description && (
+                      <p className="truncate text-[12px] text-zinc-400">{task.description}</p>
+                    )}
+                  </div>
+                  {task.due_ts && (
+                    <span
+                      className={clsx(
+                        'shrink-0 rounded-full px-2 py-0.5 text-[10.5px] font-medium',
+                        isOverdue(task)
+                          ? 'bg-red-50 text-red-600 dark:bg-red-950/40 dark:text-red-400'
+                          : 'bg-zinc-100 text-zinc-500 dark:bg-zinc-800 dark:text-zinc-400',
+                      )}
+                    >
+                      {formatDue(task.due_ts)}
+                    </span>
+                  )}
+                </div>
+              ))}
+              {open.length === 0 && <p className="px-3 text-[12.5px] text-zinc-400">Alles erledigt 🎉</p>}
+            </div>
+
+            {completed.length > 0 && (
+              <div>
+                <p className="mb-1.5 px-3 text-[11px] font-semibold tracking-wide text-zinc-400 uppercase">
+                  Erledigt ({completed.length})
+                </p>
+                <div className="space-y-1">
+                  {completed.map((task) => (
+                    <div
+                      key={task.id}
+                      onClick={() => onEdit(task)}
+                      role="button"
+                      className="group flex cursor-default items-center gap-3 rounded-xl px-3 py-2 opacity-60 transition hover:bg-zinc-50 hover:opacity-100 dark:hover:bg-zinc-900/60"
+                    >
+                      <button
+                        onClick={(e) => {
+                          e.stopPropagation()
+                          onToggleCompleted(task)
+                        }}
+                        className="flex h-4 w-4 shrink-0 items-center justify-center rounded-full border-2 border-indigo-500 bg-indigo-500 text-white"
+                      >
+                        <CheckSquare size={10} />
+                      </button>
+                      <p className="min-w-0 flex-1 truncate text-[13px] text-zinc-500 line-through dark:text-zinc-500">
+                        {task.title}
+                      </p>
+                    </div>
+                  ))}
+                </div>
+              </div>
+            )}
+          </div>
+        )}
+      </div>
+    </div>
+  )
+}
diff --git a/src/components/TemplatesModal.tsx b/src/components/TemplatesModal.tsx
new file mode 100644
index 0000000..79b0190
--- /dev/null
+++ b/src/components/TemplatesModal.tsx
@@ -0,0 +1,213 @@
+import { useEffect, useState } from 'react'
+import { FileText, Pencil, Plus, Trash2, X } from 'lucide-react'
+import { api } from '../lib/api'
+import type { Template } from '../types'
+
+const inputClass =
+  'w-full rounded-lg border border-zinc-200 bg-white px-3 py-1.5 text-[13px] text-zinc-800 outline-none transition focus:border-indigo-400 focus:ring-2 focus:ring-indigo-100 dark:border-zinc-700 dark:bg-zinc-900 dark:text-zinc-100 dark:focus:ring-indigo-500/20'
+
+function Field({ label, children }: { label: string; children: React.ReactNode }) {
+  return (
+    <label className="flex flex-col gap-1">
+      <span className="text-[11.5px] font-medium text-zinc-500 dark:text-zinc-400">{label}</span>
+      {children}
+    </label>
+  )
+}
+
+export function TemplatesModal({
+  open,
+  onClose,
+  onToast,
+  onInsert,
+}: {
+  open: boolean
+  onClose: () => void
+  onToast: (msg: string) => void
+  onInsert?: (t: Template) => void
+}) {
+  const [templates, setTemplates] = useState<Template[]>([])
+  const [loading, setLoading] = useState(false)
+  const [editing, setEditing] = useState<Template | null>(null)
+  const [name, setName] = useState('')
+  const [subject, setSubject] = useState('')
+  const [body, setBody] = useState('')
+  const [saving, setSaving] = useState(false)
+
+  function refresh() {
+    setLoading(true)
+    api
+      .listTemplates()
+      .then(setTemplates)
+      .catch((e) => onToast(`Vorlagen konnten nicht geladen werden: ${e}`))
+      .finally(() => setLoading(false))
+  }
+
+  useEffect(() => {
+    if (open) {
+      refresh()
+      setEditing(null)
+      setName('')
+      setSubject('')
+      setBody('')
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [open])
+
+  if (!open) return null
+
+  function startEdit(t: Template) {
+    setEditing(t)
+    setName(t.name)
+    setSubject(t.subject)
+    setBody(t.body)
+  }
+
+  function startNew() {
+    setEditing({ id: '', name: '', subject: '', body: '' })
+    setName('')
+    setSubject('')
+    setBody('')
+  }
+
+  async function handleSave(e: React.FormEvent) {
+    e.preventDefault()
+    if (!name.trim()) return
+    setSaving(true)
+    try {
+      if (editing?.id) {
+        await api.updateTemplate({ id: editing.id, name: name.trim(), subject, body })
+      } else {
+        await api.createTemplate({ name: name.trim(), subject, body })
+      }
+      setEditing(null)
+      refresh()
+      onToast('Vorlage gespeichert')
+    } catch (err) {
+      onToast(`Fehlgeschlagen: ${err}`)
+    } finally {
+      setSaving(false)
+    }
+  }
+
+  async function handleDelete(t: Template) {
+    setTemplates((prev) => prev.filter((x) => x.id !== t.id))
+    if (editing?.id === t.id) setEditing(null)
+    try {
+      await api.deleteTemplate(t.id)
+    } catch (err) {
+      onToast(String(err))
+    }
+  }
+
+  return (
+    <div className="animate-overlay-in fixed inset-0 z-50 flex items-center justify-center bg-zinc-900/40 p-6 backdrop-blur-sm dark:bg-black/60">
+      <div className="animate-panel-in flex max-h-[85vh] w-full max-w-lg flex-col overflow-hidden rounded-[28px] border border-white/70 bg-white/95 shadow-[0_24px_70px_-12px_rgba(15,15,25,0.35)] ring-1 ring-black/[0.03] backdrop-blur-2xl dark:border-white/10 dark:bg-zinc-900/90 dark:shadow-[0_24px_70px_-12px_rgba(0,0,0,0.6)]">
+        <div className="flex items-center justify-between border-b border-zinc-200/70 px-6 py-4 dark:border-zinc-800/70">
+          <h2 className="flex items-center gap-2 text-[15px] font-semibold tracking-tight text-zinc-800 dark:text-zinc-100">
+            <FileText size={16} className="text-zinc-400" /> E-Mail-Vorlagen
+          </h2>
+          <button
+            onClick={onClose}
+            className="rounded-full p-1.5 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+          >
+            <X size={16} />
+          </button>
+        </div>
+
+        <div className="flex-1 space-y-4 overflow-y-auto px-6 py-5">
+          {editing ? (
+            <form onSubmit={handleSave} className="space-y-2.5 rounded-2xl border border-zinc-200/80 bg-zinc-50/60 p-3.5 dark:border-zinc-800 dark:bg-zinc-950/40">
+              <p className="text-[11px] font-semibold tracking-wide text-zinc-400 uppercase">
+                {editing.id ? 'Vorlage bearbeiten' : 'Neue Vorlage'}
+              </p>
+              <Field label="Name">
+                <input className={inputClass} value={name} onChange={(e) => setName(e.target.value)} placeholder="z. B. Angebot" />
+              </Field>
+              <Field label="Betreff (optional)">
+                <input className={inputClass} value={subject} onChange={(e) => setSubject(e.target.value)} />
+              </Field>
+              <Field label="Text">
+                <textarea
+                  value={body}
+                  onChange={(e) => setBody(e.target.value)}
+                  rows={5}
+                  className={`${inputClass} resize-none`}
+                />
+              </Field>
+              <div className="flex gap-2">
+                <button
+                  type="submit"
+                  disabled={saving || !name.trim()}
+                  className="rounded-full bg-gradient-to-b from-indigo-500 to-indigo-600 px-4 py-1.5 text-[12.5px] font-medium text-white shadow-lg shadow-indigo-600/25 transition hover:from-indigo-400 hover:to-indigo-500 disabled:opacity-60"
+                >
+                  {saving ? 'Speichere…' : 'Speichern'}
+                </button>
+                <button
+                  type="button"
+                  onClick={() => setEditing(null)}
+                  className="rounded-full px-4 py-1.5 text-[12.5px] font-medium text-zinc-500 transition hover:bg-zinc-100 dark:hover:bg-zinc-800"
+                >
+                  Abbrechen
+                </button>
+              </div>
+            </form>
+          ) : (
+            <button
+              type="button"
+              onClick={startNew}
+              className="flex w-full items-center justify-center gap-1.5 rounded-2xl border border-dashed border-zinc-300 py-2.5 text-[12.5px] font-medium text-zinc-500 transition hover:border-indigo-300 hover:text-indigo-600 dark:border-zinc-700 dark:text-zinc-400 dark:hover:border-indigo-800"
+            >
+              <Plus size={14} /> Neue Vorlage
+            </button>
+          )}
+
+          <div>
+            {loading ? (
+              <p className="text-xs text-zinc-400">Lade…</p>
+            ) : templates.length === 0 ? (
+              <p className="text-xs text-zinc-400">Noch keine Vorlagen.</p>
+            ) : (
+              <div className="space-y-1.5">
+                {templates.map((t) => (
+                  <div
+                    key={t.id}
+                    className="flex items-center gap-2.5 rounded-xl border border-zinc-200/80 px-3 py-2 dark:border-zinc-800"
+                  >
+                    <div className="min-w-0 flex-1">
+                      <p className="truncate text-[12.5px] font-medium text-zinc-700 dark:text-zinc-300">{t.name}</p>
+                      {t.subject && <p className="truncate text-[11px] text-zinc-400">{t.subject}</p>}
+                    </div>
+                    {onInsert && (
+                      <button
+                        onClick={() => {
+                          onInsert(t)
+                          onClose()
+                        }}
+                        className="shrink-0 rounded-full bg-indigo-50 px-2.5 py-1 text-[11px] font-medium text-indigo-700 transition hover:bg-indigo-100 dark:bg-indigo-500/10 dark:text-indigo-300"
+                      >
+                        Einfügen
+                      </button>
+                    )}
+                    <button
+                      onClick={() => startEdit(t)}
+                      className="shrink-0 rounded-full p-1 text-zinc-400 transition hover:bg-zinc-100 hover:text-zinc-600 dark:hover:bg-zinc-800"
+                    >
+                      <Pencil size={13} />
+                    </button>
+                    <button
+                      onClick={() => handleDelete(t)}
+                      className="shrink-0 rounded-full p-1 text-zinc-400 transition hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-950/40"
+                    >
+                      <Trash2 size={13} />
+                    </button>
+                  </div>
+                ))}
+              </div>
+            )}
+          </div>
+        </div>
+      </div>
+    </div>
+  )
+}
diff --git a/src/components/UndoSendBanner.tsx b/src/components/UndoSendBanner.tsx
new file mode 100644
index 0000000..abfba8b
--- /dev/null
+++ b/src/components/UndoSendBanner.tsx
@@ -0,0 +1,40 @@
+import { useEffect, useState } from 'react'
+import { Send, Undo2 } from 'lucide-react'
+
+function nowSec() {
+  return Math.floor(Date.now() / 1000)
+}
+
+export function UndoSendBanner({
+  deadline,
+  onUndo,
+}: {
+  deadline: number
+  onUndo: () => void
+}) {
+  const [remaining, setRemaining] = useState(() => Math.max(0, deadline - nowSec()))
+
+  useEffect(() => {
+    setRemaining(Math.max(0, deadline - nowSec()))
+    const interval = setInterval(() => setRemaining(Math.max(0, deadline - nowSec())), 500)
+    return () => clearInterval(interval)
+  }, [deadline])
+
+  const label =
+    remaining > 90
+      ? `Wird gesendet um ${new Date(deadline * 1000).toLocaleTimeString('de-DE', { hour: '2-digit', minute: '2-digit' })}`
+      : `Wird in ${remaining}s gesendet`
+
+  return (
+    <div className="animate-toast-in fixed bottom-6 left-1/2 z-50 flex -translate-x-1/2 items-center gap-3 rounded-full border border-white/10 bg-zinc-900/95 px-5 py-2.5 text-[13px] font-medium text-white shadow-[0_12px_35px_-8px_rgba(0,0,0,0.5)] backdrop-blur-xl dark:border-black/10 dark:bg-zinc-100/95 dark:text-zinc-900">
+      <Send size={14} className="shrink-0 text-zinc-400 dark:text-zinc-500" />
+      <span>{label}</span>
+      <button
+        onClick={onUndo}
+        className="flex shrink-0 items-center gap-1.5 rounded-full bg-white/10 px-3 py-1 text-[12.5px] font-semibold transition hover:bg-white/20 dark:bg-black/10 dark:hover:bg-black/20"
+      >
+        <Undo2 size={13} /> Rückgängig
+      </button>
+    </div>
+  )
+}
diff --git a/src/index.css b/src/index.css
new file mode 100644
index 0000000..fe1d1a4
--- /dev/null
+++ b/src/index.css
@@ -0,0 +1,121 @@
+@import "tailwindcss";
+
+@custom-variant dark (&:where(.dark, .dark *));
+
+:root {
+  color-scheme: light dark;
+  font-synthesis: none;
+  text-rendering: optimizeLegibility;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+html,
+body,
+#root {
+  height: 100%;
+  margin: 0;
+  overscroll-behavior: none;
+}
+
+* {
+  box-sizing: border-box;
+}
+
+::selection {
+  background: color-mix(in srgb, var(--color-indigo-500) 35%, transparent);
+}
+
+/* thin, unobtrusive scrollbars that match the theme */
+* {
+  scrollbar-width: thin;
+  scrollbar-color: color-mix(in srgb, currentColor 18%, transparent) transparent;
+}
+*::-webkit-scrollbar {
+  width: 9px;
+  height: 9px;
+}
+*::-webkit-scrollbar-track {
+  background: transparent;
+}
+*::-webkit-scrollbar-thumb {
+  background: color-mix(in srgb, currentColor 16%, transparent);
+  border-radius: 999px;
+  border: 2px solid transparent;
+  background-clip: content-box;
+}
+*::-webkit-scrollbar-thumb:hover {
+  background: color-mix(in srgb, currentColor 28%, transparent);
+  background-clip: content-box;
+}
+
+@keyframes overlay-in {
+  from {
+    opacity: 0;
+  }
+  to {
+    opacity: 1;
+  }
+}
+@keyframes panel-in {
+  from {
+    opacity: 0;
+    transform: translateY(10px) scale(0.98);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0) scale(1);
+  }
+}
+@keyframes toast-in {
+  from {
+    opacity: 0;
+    transform: translate(-50%, 10px) scale(0.96);
+  }
+  to {
+    opacity: 1;
+    transform: translate(-50%, 0) scale(1);
+  }
+}
+@keyframes row-in {
+  from {
+    opacity: 0;
+    transform: translateY(4px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+.animate-overlay-in {
+  animation: overlay-in 180ms ease-out both;
+}
+.animate-panel-in {
+  animation: panel-in 220ms cubic-bezier(0.16, 1, 0.3, 1) both;
+}
+.animate-toast-in {
+  animation: toast-in 260ms cubic-bezier(0.16, 1, 0.3, 1) both;
+}
+.animate-row-in {
+  animation: row-in 240ms ease-out both;
+}
+
+.compose-body ul {
+  list-style: disc;
+  padding-left: 1.4em;
+}
+.compose-body ol {
+  list-style: decimal;
+  padding-left: 1.4em;
+}
+.compose-body a {
+  color: var(--color-indigo-600);
+  text-decoration: underline;
+}
+.compose-body blockquote {
+  margin: 6px 0;
+  padding-left: 10px;
+  border-left: 3px solid color-mix(in srgb, currentColor 25%, transparent);
+  color: color-mix(in srgb, currentColor 65%, transparent);
+}
diff --git a/src/lib/addresses.ts b/src/lib/addresses.ts
new file mode 100644
index 0000000..a2f92bb
--- /dev/null
+++ b/src/lib/addresses.ts
@@ -0,0 +1,11 @@
+export function parseAddressList(raw: string): string[] {
+  return raw
+    .split(',')
+    .map((s) => s.trim())
+    .filter(Boolean)
+    .map((s) => {
+      const match = s.match(/<([^>]+)>/)
+      return (match ? match[1] : s).trim().toLowerCase()
+    })
+    .filter(Boolean)
+}
diff --git a/src/lib/api.ts b/src/lib/api.ts
new file mode 100644
index 0000000..96834f0
--- /dev/null
+++ b/src/lib/api.ts
@@ -0,0 +1,147 @@
+import { invoke } from '@tauri-apps/api/core'
+import type {
+  Account,
+  CaldavAccount,
+  ComposeMessage,
+  Contact,
+  ContactGroup,
+  DraftPayload,
+  Event,
+  Folder,
+  InviteInfo,
+  InviteResponse,
+  MessageFull,
+  MessageSummary,
+  NewAccount,
+  NewContact,
+  NewContactGroup,
+  NewEvent,
+  NewCaldavAccount,
+  NewRule,
+  NewTask,
+  NewTemplate,
+  NewVacationSettings,
+  Rule,
+  SnoozedMessage,
+  Task,
+  Template,
+  VacationSettings,
+} from '../types'
+
+export const api = {
+  addAccount: (newAccount: NewAccount) => invoke<Account>('add_account', { newAccount }),
+  listAccounts: () => invoke<Account[]>('list_accounts'),
+  deleteAccount: (accountId: string) => invoke<void>('delete_account', { accountId }),
+  updateAccount: (account: Account, newPassword?: string) =>
+    invoke<void>('update_account', { account, newPassword: newPassword || undefined }),
+  listFolders: (accountId: string) => invoke<Folder[]>('list_folders', { accountId }),
+  createFolder: (accountId: string, name: string) => invoke<void>('create_folder', { accountId, name }),
+  renameFolder: (accountId: string, from: string, to: string) => invoke<void>('rename_folder', { accountId, from, to }),
+  deleteFolder: (accountId: string, name: string) => invoke<void>('delete_folder', { accountId, name }),
+  markFolderRead: (accountId: string, folder: string) => invoke<number>('mark_folder_read', { accountId, folder }),
+  applyRulesToFolder: (accountId: string, folder: string) => invoke<number>('apply_rules_to_folder', { accountId, folder }),
+  syncMessages: (accountId: string, folder: string) =>
+    invoke<MessageSummary[]>('sync_messages', { accountId, folder }),
+  listCachedMessages: (accountId: string, folder: string) =>
+    invoke<MessageSummary[]>('list_cached_messages', { accountId, folder }),
+  getMessage: (accountId: string, folder: string, uid: number) =>
+    invoke<MessageFull>('get_message', { accountId, folder, uid }),
+  sendMessage: (message: ComposeMessage) => invoke<void>('send_message', { message }),
+  sendMessageAt: (message: ComposeMessage, sendAtTs: number) => invoke<string>('send_message_at', { message, sendAtTs }),
+  cancelScheduledSend: (id: string) => invoke<boolean>('cancel_scheduled_send', { id }),
+  markRead: (accountId: string, folder: string, uid: number, isRead: boolean) =>
+    invoke<void>('mark_read', { accountId, folder, uid, isRead }),
+  deleteMessage: (accountId: string, folder: string, uid: number) =>
+    invoke<void>('delete_message', { accountId, folder, uid }),
+  searchMessages: (accountId: string, query: string) =>
+    invoke<MessageSummary[]>('search_messages', { accountId, query }),
+  searchAllMessages: (query: string) => invoke<MessageSummary[]>('search_all_messages', { query }),
+  setMessageCategory: (accountId: string, folder: string, uid: number, category: string | null) =>
+    invoke<void>('set_message_category', { accountId, folder, uid, category }),
+  toggleFlag: (accountId: string, folder: string, uid: number, flagged: boolean) =>
+    invoke<void>('toggle_flag', { accountId, folder, uid, flagged }),
+  moveMessage: (accountId: string, folder: string, uid: number, targetFolder: string) =>
+    invoke<void>('move_message', { accountId, folder, uid, targetFolder }),
+  listContacts: () => invoke<Contact[]>('list_contacts'),
+  searchContacts: (query: string) => invoke<Contact[]>('search_contacts', { query }),
+  addContact: (newContact: NewContact) => invoke<Contact>('add_contact', { newContact }),
+  updateContact: (contact: Contact) => invoke<void>('update_contact', { contact }),
+  deleteContact: (contactId: string) => invoke<void>('delete_contact', { contactId }),
+  toggleContactFavorite: (contactId: string, favorite: boolean) =>
+    invoke<void>('toggle_contact_favorite', { contactId, favorite }),
+  exportContactsVcard: (path: string) => invoke<number>('export_contacts_vcard', { path }),
+  importContactsVcard: (path: string) => invoke<number>('import_contacts_vcard', { path }),
+  exportMessageEml: (accountId: string, folder: string, uid: number, path: string) =>
+    invoke<void>('export_message_eml', { accountId, folder, uid, path }),
+  exportFolderMbox: (accountId: string, folder: string, path: string) =>
+    invoke<number>('export_folder_mbox', { accountId, folder, path }),
+  exportFullBackup: (dir: string) => invoke<number>('export_full_backup', { dir }),
+  importEmlFile: (accountId: string, folder: string, path: string) =>
+    invoke<void>('import_eml_file', { accountId, folder, path }),
+  importMboxFile: (accountId: string, folder: string, path: string) =>
+    invoke<number>('import_mbox_file', { accountId, folder, path }),
+  saveDraft: (uid: number | null, message: ComposeMessage) =>
+    invoke<number>('save_draft', { uid, message }),
+  loadDraft: (uid: number) => invoke<DraftPayload>('load_draft', { uid }),
+  googleOAuthAddAccount: () => invoke<Account>('google_oauth_add_account'),
+  listRules: () => invoke<Rule[]>('list_rules'),
+  createRule: (newRule: NewRule) => invoke<Rule>('create_rule', { newRule }),
+  setRuleEnabled: (ruleId: string, enabled: boolean) => invoke<void>('set_rule_enabled', { ruleId, enabled }),
+  deleteRule: (ruleId: string) => invoke<void>('delete_rule', { ruleId }),
+  listEvents: (startTs: number, endTs: number) => invoke<Event[]>('list_events', { startTs, endTs }),
+  createEvent: (newEvent: NewEvent) => invoke<Event>('create_event', { newEvent }),
+  updateEvent: (event: Event) => invoke<void>('update_event', { event }),
+  deleteEvent: (eventId: string) => invoke<void>('delete_event', { eventId }),
+  updateEventOccurrence: (baseId: string, occurrenceStart: number, data: NewEvent) =>
+    invoke<Event>('update_event_occurrence', { baseId, occurrenceStart, data }),
+  deleteEventOccurrence: (baseId: string, occurrenceStart: number) =>
+    invoke<void>('delete_event_occurrence', { baseId, occurrenceStart }),
+  listCaldavAccounts: () => invoke<CaldavAccount[]>('list_caldav_accounts'),
+  addCaldavAccount: (newAccount: NewCaldavAccount) => invoke<CaldavAccount>('add_caldav_account', { newAccount }),
+  deleteCaldavAccount: (accountId: string) => invoke<void>('delete_caldav_account', { accountId }),
+  syncCaldavCalendar: (accountId: string) => invoke<number>('sync_caldav_calendar', { accountId }),
+  importIcsFile: (path: string) => invoke<number>('import_ics_file', { path }),
+  importIcsText: (text: string) => invoke<number>('import_ics_text', { text }),
+  previewInvite: (icsBase64: string) => invoke<InviteInfo | null>('preview_invite', { icsBase64 }),
+  replyToInvite: (accountId: string, icsBase64: string, response: InviteResponse) =>
+    invoke<void>('reply_to_invite', { accountId, icsBase64, response }),
+  getVacationSettings: (accountId: string) => invoke<VacationSettings>('get_vacation_settings', { accountId }),
+  saveVacationSettings: (accountId: string, settings: NewVacationSettings) =>
+    invoke<void>('save_vacation_settings', { accountId, settings }),
+  snoozeMessage: (accountId: string, folder: string, uid: number, untilTs: number) =>
+    invoke<void>('snooze_message', { accountId, folder, uid, untilTs }),
+  unsnoozeMessage: (accountId: string, folder: string, uid: number) =>
+    invoke<void>('unsnooze_message', { accountId, folder, uid }),
+  listSnoozedMessages: () => invoke<SnoozedMessage[]>('list_snoozed_messages'),
+  listTemplates: () => invoke<Template[]>('list_templates'),
+  createTemplate: (newTemplate: NewTemplate) => invoke<Template>('create_template', { newTemplate }),
+  updateTemplate: (template: Template) => invoke<void>('update_template', { template }),
+  deleteTemplate: (templateId: string) => invoke<void>('delete_template', { templateId }),
+  searchMessagesAdvanced: (
+    query: string,
+    from: string | undefined,
+    dateFrom: number | undefined,
+    dateTo: number | undefined,
+    hasAttachment: boolean,
+  ) => invoke<MessageSummary[]>('search_messages_advanced', { query, from, dateFrom, dateTo, hasAttachment }),
+  exportEventsIcs: (path: string) => invoke<number>('export_events_ics', { path }),
+  getEvent: (eventId: string) => invoke<Event>('get_event', { eventId }),
+  listUpcomingReminders: (withinHours: number) => invoke<Event[]>('list_upcoming_reminders', { withinHours }),
+  syncGoogleCalendar: (accountId: string) => invoke<number>('sync_google_calendar', { accountId }),
+  syncGoogleContacts: (accountId: string) => invoke<number>('sync_google_contacts', { accountId }),
+  reconnectGoogleAccount: (accountId: string) => invoke<void>('reconnect_google_account', { accountId }),
+  setDesktopNotificationsEnabled: (enabled: boolean) =>
+    invoke<void>('set_desktop_notifications_enabled', { enabled }),
+  listTasks: () => invoke<Task[]>('list_tasks'),
+  createTask: (newTask: NewTask) => invoke<Task>('create_task', { newTask }),
+  updateTask: (task: Task) => invoke<void>('update_task', { task }),
+  deleteTask: (taskId: string) => invoke<void>('delete_task', { taskId }),
+  setTaskCompleted: (taskId: string, completed: boolean) =>
+    invoke<void>('set_task_completed', { taskId, completed }),
+  createTaskFromMessage: (accountId: string, folder: string, uid: number, title: string) =>
+    invoke<Task>('create_task_from_message', { accountId, folder, uid, title }),
+  listContactGroups: () => invoke<ContactGroup[]>('list_contact_groups'),
+  createContactGroup: (newGroup: NewContactGroup) => invoke<ContactGroup>('create_contact_group', { newGroup }),
+  updateContactGroup: (group: ContactGroup) => invoke<void>('update_contact_group', { group }),
+  deleteContactGroup: (groupId: string) => invoke<void>('delete_contact_group', { groupId }),
+}
diff --git a/src/lib/categories.ts b/src/lib/categories.ts
new file mode 100644
index 0000000..085052d
--- /dev/null
+++ b/src/lib/categories.ts
@@ -0,0 +1,19 @@
+export interface CategoryColor {
+  id: string
+  label: string
+  hex: string
+}
+
+export const CATEGORY_COLORS: CategoryColor[] = [
+  { id: 'red', label: 'Rot', hex: '#ef4444' },
+  { id: 'orange', label: 'Orange', hex: '#f97316' },
+  { id: 'yellow', label: 'Gelb', hex: '#eab308' },
+  { id: 'green', label: 'Grün', hex: '#22c55e' },
+  { id: 'blue', label: 'Blau', hex: '#3b82f6' },
+  { id: 'purple', label: 'Lila', hex: '#a855f7' },
+]
+
+export function categoryHex(id: string | null | undefined): string | null {
+  if (!id) return null
+  return CATEGORY_COLORS.find((c) => c.id === id)?.hex ?? null
+}
diff --git a/src/lib/format.ts b/src/lib/format.ts
new file mode 100644
index 0000000..633fcb1
--- /dev/null
+++ b/src/lib/format.ts
@@ -0,0 +1,42 @@
+import { format, isThisYear, isToday } from 'date-fns'
+
+const AVATAR_COLORS = [
+  '#6366f1', '#8b5cf6', '#ec4899', '#f59e0b',
+  '#10b981', '#06b6d4', '#3b82f6', '#ef4444',
+]
+
+export function initials(name: string): string {
+  const clean = name.trim()
+  if (!clean) return '?'
+  const parts = clean.split(/\s+/).filter(Boolean)
+  if (parts.length === 1) return parts[0].slice(0, 2).toUpperCase()
+  return (parts[0][0] + parts[parts.length - 1][0]).toUpperCase()
+}
+
+export function avatarColor(seed: string): string {
+  let hash = 0
+  for (let i = 0; i < seed.length; i++) {
+    hash = seed.charCodeAt(i) + ((hash << 5) - hash)
+  }
+  return AVATAR_COLORS[Math.abs(hash) % AVATAR_COLORS.length]
+}
+
+export function formatListDate(timestamp: number): string {
+  if (!timestamp) return ''
+  const date = new Date(timestamp * 1000)
+  if (isToday(date)) return format(date, 'HH:mm')
+  if (isThisYear(date)) return format(date, 'd. MMM')
+  return format(date, 'd. MMM yyyy')
+}
+
+export function formatFullDate(rawDate: string): string {
+  const date = new Date(rawDate)
+  if (Number.isNaN(date.getTime())) return rawDate
+  return format(date, 'EEEE, d. MMMM yyyy, HH:mm')
+}
+
+export function formatBytes(bytes: number): string {
+  if (bytes < 1024) return `${bytes} B`
+  if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(1)} KB`
+  return `${(bytes / (1024 * 1024)).toFixed(1)} MB`
+}
diff --git a/src/lib/providers.ts b/src/lib/providers.ts
new file mode 100644
index 0000000..91ab256
--- /dev/null
+++ b/src/lib/providers.ts
@@ -0,0 +1,86 @@
+import type { Protocol } from '../types'
+
+export interface ProviderPreset {
+  id: string
+  label: string
+  color: string
+  protocol: Protocol
+  incoming_host: string
+  incoming_port: number
+  smtp_host: string
+  smtp_port: number
+  smtp_starttls: boolean
+  hint?: string
+}
+
+export const providerPresets: ProviderPreset[] = [
+  {
+    id: 'gmail',
+    label: 'Google Mail',
+    color: '#ea4335',
+    protocol: 'imap',
+    incoming_host: 'imap.gmail.com',
+    incoming_port: 993,
+    smtp_host: 'smtp.gmail.com',
+    smtp_port: 465,
+    smtp_starttls: false,
+    hint: 'Nutze ein App-Passwort (Google-Konto -> Sicherheit -> App-Passwörter), nicht dein normales Passwort.',
+  },
+  {
+    id: 'outlook',
+    label: 'Outlook / Microsoft 365',
+    color: '#0078d4',
+    protocol: 'imap',
+    incoming_host: 'outlook.office365.com',
+    incoming_port: 993,
+    smtp_host: 'smtp.office365.com',
+    smtp_port: 587,
+    smtp_starttls: true,
+  },
+  {
+    id: 'yahoo',
+    label: 'Yahoo Mail',
+    color: '#6001d2',
+    protocol: 'imap',
+    incoming_host: 'imap.mail.yahoo.com',
+    incoming_port: 993,
+    smtp_host: 'smtp.mail.yahoo.com',
+    smtp_port: 465,
+    smtp_starttls: false,
+    hint: 'Erfordert ein App-Passwort aus den Yahoo-Kontoeinstellungen.',
+  },
+  {
+    id: 'icloud',
+    label: 'iCloud Mail',
+    color: '#3693f3',
+    protocol: 'imap',
+    incoming_host: 'imap.mail.me.com',
+    incoming_port: 993,
+    smtp_host: 'smtp.mail.me.com',
+    smtp_port: 587,
+    smtp_starttls: true,
+    hint: 'Erfordert ein app-spezifisches Passwort von appleid.apple.com.',
+  },
+  {
+    id: 'custom-imap',
+    label: 'Custom IMAP',
+    color: '#64748b',
+    protocol: 'imap',
+    incoming_host: '',
+    incoming_port: 993,
+    smtp_host: '',
+    smtp_port: 587,
+    smtp_starttls: true,
+  },
+  {
+    id: 'custom-pop3',
+    label: 'Custom POP3',
+    color: '#64748b',
+    protocol: 'pop3',
+    incoming_host: '',
+    incoming_port: 995,
+    smtp_host: '',
+    smtp_port: 587,
+    smtp_starttls: true,
+  },
+]
diff --git a/src/lib/richtext.ts b/src/lib/richtext.ts
new file mode 100644
index 0000000..30621df
--- /dev/null
+++ b/src/lib/richtext.ts
@@ -0,0 +1,7 @@
+export function htmlIsEmpty(html: string): boolean {
+  return !html || html.replace(/<[^>]*>/g, '').trim().length === 0
+}
+
+export function escapeHtml(s: string): string {
+  return s.replace(/[&<>]/g, (c) => ({ '&': '&amp;', '<': '&lt;', '>': '&gt;' })[c]!)
+}
diff --git a/src/lib/settings.ts b/src/lib/settings.ts
new file mode 100644
index 0000000..db6e5ca
--- /dev/null
+++ b/src/lib/settings.ts
@@ -0,0 +1,28 @@
+export interface AppSettings {
+  desktop: boolean
+  popup: boolean
+  composePopup: boolean
+}
+
+const KEY = 'mailclient.notifySettings'
+
+const DEFAULTS: AppSettings = { desktop: true, popup: true, composePopup: false }
+
+export function loadAppSettings(): AppSettings {
+  try {
+    const raw = localStorage.getItem(KEY)
+    if (!raw) return DEFAULTS
+    const parsed = JSON.parse(raw) as Partial<AppSettings>
+    return {
+      desktop: parsed.desktop ?? DEFAULTS.desktop,
+      popup: parsed.popup ?? DEFAULTS.popup,
+      composePopup: parsed.composePopup ?? DEFAULTS.composePopup,
+    }
+  } catch {
+    return DEFAULTS
+  }
+}
+
+export function saveAppSettings(v: AppSettings) {
+  localStorage.setItem(KEY, JSON.stringify(v))
+}
diff --git a/src/lib/signature.ts b/src/lib/signature.ts
new file mode 100644
index 0000000..26f8b2c
--- /dev/null
+++ b/src/lib/signature.ts
@@ -0,0 +1,92 @@
+export interface Signature {
+  id: string
+  name: string
+  body: string
+}
+
+interface AccountSignatures {
+  signatures: Signature[]
+  defaultId: string | null
+}
+
+const KEY = 'mailclient.signatures.v2'
+const LEGACY_KEY = 'mailclient.signatures'
+
+function migrateLegacy(): Record<string, AccountSignatures> {
+  const out: Record<string, AccountSignatures> = {}
+  try {
+    const raw = localStorage.getItem(LEGACY_KEY)
+    if (!raw) return out
+    const legacy = JSON.parse(raw) as Record<string, string>
+    for (const [accountId, body] of Object.entries(legacy)) {
+      if (!body.trim()) continue
+      const id = crypto.randomUUID()
+      out[accountId] = { signatures: [{ id, name: 'Standard', body }], defaultId: id }
+    }
+    localStorage.setItem(KEY, JSON.stringify(out))
+  } catch {
+    // ignore malformed legacy data
+  }
+  return out
+}
+
+function loadAll(): Record<string, AccountSignatures> {
+  try {
+    const raw = localStorage.getItem(KEY)
+    if (!raw) return migrateLegacy()
+    return JSON.parse(raw) as Record<string, AccountSignatures>
+  } catch {
+    return {}
+  }
+}
+
+function saveAll(all: Record<string, AccountSignatures>) {
+  localStorage.setItem(KEY, JSON.stringify(all))
+}
+
+export function listSignatures(accountId: string): Signature[] {
+  return loadAll()[accountId]?.signatures ?? []
+}
+
+export function getDefaultSignature(accountId: string): Signature | null {
+  const acc = loadAll()[accountId]
+  if (!acc || acc.signatures.length === 0) return null
+  return acc.signatures.find((s) => s.id === acc.defaultId) ?? acc.signatures[0]
+}
+
+export function getDefaultSignatureId(accountId: string): string | null {
+  return loadAll()[accountId]?.defaultId ?? null
+}
+
+export function saveSignatureList(accountId: string, signatures: Signature[], defaultId: string | null) {
+  const all = loadAll()
+  if (signatures.length === 0) {
+    delete all[accountId]
+  } else {
+    const resolvedDefault = signatures.some((s) => s.id === defaultId) ? defaultId : signatures[0].id
+    all[accountId] = { signatures, defaultId: resolvedDefault }
+  }
+  saveAll(all)
+}
+
+/// Back-compat helper: the single "signature text" a fresh compose should
+/// start with — the account's default signature body, or empty.
+export function loadSignature(accountId: string): string {
+  return getDefaultSignature(accountId)?.body ?? ''
+}
+
+/// Sets the body of the account's default signature (creating a "Standard"
+/// signature if none exists yet), leaving any other named signatures intact.
+/// Used by the simple single-field signature editor in account settings.
+export function saveSignature(accountId: string, body: string) {
+  const existing = listSignatures(accountId)
+  const defaultId = getDefaultSignatureId(accountId)
+  const current = existing.find((s) => s.id === defaultId) ?? existing[0]
+  if (current) {
+    const next = existing.map((s) => (s.id === current.id ? { ...s, body } : s))
+    saveSignatureList(accountId, next, current.id)
+  } else if (body.trim()) {
+    const sig: Signature = { id: crypto.randomUUID(), name: 'Standard', body }
+    saveSignatureList(accountId, [sig], sig.id)
+  }
+}
diff --git a/src/lib/theme.ts b/src/lib/theme.ts
new file mode 100644
index 0000000..c65b28d
--- /dev/null
+++ b/src/lib/theme.ts
@@ -0,0 +1,52 @@
+export type Theme = 'light' | 'dark' | 'system'
+export type Density = 'comfortable' | 'compact'
+
+const THEME_KEY = 'mailclient.theme'
+const DENSITY_KEY = 'mailclient.density'
+const FAVORITES_KEY = 'mailclient.favorites'
+const CONVERSATIONS_KEY = 'mailclient.conversations'
+
+export function loadTheme(): Theme {
+  const v = localStorage.getItem(THEME_KEY)
+  return v === 'light' || v === 'dark' || v === 'system' ? v : 'system'
+}
+
+export function saveTheme(t: Theme) {
+  localStorage.setItem(THEME_KEY, t)
+}
+
+export function applyTheme(t: Theme) {
+  const prefersDark = window.matchMedia('(prefers-color-scheme: dark)').matches
+  const dark = t === 'dark' || (t === 'system' && prefersDark)
+  document.documentElement.classList.toggle('dark', dark)
+}
+
+export function loadDensity(): Density {
+  const v = localStorage.getItem(DENSITY_KEY)
+  return v === 'compact' ? 'compact' : 'comfortable'
+}
+
+export function saveDensity(d: Density) {
+  localStorage.setItem(DENSITY_KEY, d)
+}
+
+export function loadFavoritesRaw<T>(): T[] {
+  try {
+    const raw = localStorage.getItem(FAVORITES_KEY)
+    return raw ? (JSON.parse(raw) as T[]) : []
+  } catch {
+    return []
+  }
+}
+
+export function saveFavoritesRaw<T>(favorites: T[]) {
+  localStorage.setItem(FAVORITES_KEY, JSON.stringify(favorites))
+}
+
+export function loadConversationsEnabled(): boolean {
+  return localStorage.getItem(CONVERSATIONS_KEY) === '1'
+}
+
+export function saveConversationsEnabled(enabled: boolean) {
+  localStorage.setItem(CONVERSATIONS_KEY, enabled ? '1' : '0')
+}
diff --git a/src/main.tsx b/src/main.tsx
new file mode 100644
index 0000000..5b2b4e3
--- /dev/null
+++ b/src/main.tsx
@@ -0,0 +1,11 @@
+import { StrictMode } from 'react'
+import { createRoot } from 'react-dom/client'
+import './index.css'
+import App from './App.tsx'
+import { ComposeWindow } from './ComposeWindow.tsx'
+
+const isComposeWindow = new URLSearchParams(window.location.search).has('compose')
+
+createRoot(document.getElementById('root')!).render(
+  <StrictMode>{isComposeWindow ? <ComposeWindow /> : <App />}</StrictMode>,
+)
diff --git a/src/types.ts b/src/types.ts
new file mode 100644
index 0000000..e8066b7
--- /dev/null
+++ b/src/types.ts
@@ -0,0 +1,285 @@
+export type Protocol = 'imap' | 'pop3' | 'local'
+export type AuthMethod = 'password' | 'google_oauth'
+
+export interface Account {
+  id: string
+  label: string
+  email: string
+  username: string
+  protocol: Protocol
+  incoming_host: string
+  incoming_port: number
+  smtp_host: string
+  smtp_port: number
+  smtp_starttls: boolean
+  auth_method: AuthMethod
+}
+
+export type RuleField = 'from' | 'subject'
+export type RuleAction = 'move_to' | 'mark_read' | 'flag' | 'delete'
+export type MatchType = 'all' | 'any'
+
+export interface RuleCondition {
+  field: string
+  contains: string
+}
+
+export interface Rule {
+  id: string
+  account_id: string | null
+  conditions: RuleCondition[]
+  match_type: MatchType
+  action: RuleAction
+  action_value: string | null
+  enabled: boolean
+}
+
+export interface NewRule {
+  account_id: string | null
+  conditions: RuleCondition[]
+  match_type: MatchType
+  action: RuleAction
+  action_value?: string
+}
+
+export interface NewAccount {
+  label: string
+  email: string
+  username: string
+  password: string
+  protocol: Protocol
+  incoming_host: string
+  incoming_port: number
+  smtp_host: string
+  smtp_port: number
+  smtp_starttls: boolean
+}
+
+export interface Folder {
+  name: string
+  display_name: string
+  unread: number
+}
+
+export interface MessageSummary {
+  uid: number
+  account_id: string
+  folder: string
+  from_name: string
+  from_addr: string
+  subject: string
+  date: string
+  timestamp: number
+  snippet: string
+  is_read: boolean
+  has_attachments: boolean
+  flagged: boolean
+  message_id: string
+  thread_id: string
+  category: string | null
+}
+
+export interface AttachmentMeta {
+  filename: string
+  mime_type: string
+  size: number
+  content_base64: string
+}
+
+export interface MessageFull {
+  uid: number
+  account_id: string
+  folder: string
+  from_name: string
+  from_addr: string
+  to: string
+  subject: string
+  date: string
+  body_html: string | null
+  body_text: string | null
+  attachments: AttachmentMeta[]
+}
+
+export interface Contact {
+  id: string
+  name: string
+  email: string | null
+  phone: string | null
+  address: string | null
+  company: string | null
+  notes: string | null
+  favorite: boolean
+  google_account_id?: string | null
+  google_resource_name?: string | null
+}
+
+export interface NewContact {
+  name: string
+  email?: string | null
+  phone?: string | null
+  address?: string | null
+  company?: string
+  notes?: string
+}
+
+export interface ContactGroup {
+  id: string
+  name: string
+  member_ids: string[]
+}
+
+export interface NewContactGroup {
+  name: string
+  member_ids: string[]
+}
+
+export interface OutgoingAttachment {
+  filename: string
+  mime_type: string
+  content_base64: string
+}
+
+export interface DraftPayload {
+  uid: number
+  account_id: string | null
+  to: string
+  cc: string
+  subject: string
+  body: string
+}
+
+export interface Event {
+  id: string
+  base_id: string
+  title: string
+  location: string | null
+  description: string | null
+  start_ts: number
+  end_ts: number
+  all_day: boolean
+  account_id: string | null
+  google_event_id: string | null
+  rrule: string | null
+  reminder_minutes: number | null
+  category: string | null
+  exdates?: string | null
+  series_id?: string | null
+}
+
+export interface NewEvent {
+  title: string
+  location?: string
+  description?: string
+  start_ts: number
+  end_ts: number
+  all_day: boolean
+  account_id?: string | null
+  rrule?: string | null
+  reminder_minutes?: number | null
+  category?: string | null
+}
+
+export type TaskPriority = 'low' | 'normal' | 'high'
+
+export interface Task {
+  id: string
+  title: string
+  description: string | null
+  due_ts: number | null
+  priority: TaskPriority
+  completed: boolean
+  created_ts: number
+  source_account_id: string | null
+  source_folder: string | null
+  source_uid: number | null
+}
+
+export interface NewTask {
+  title: string
+  description?: string | null
+  due_ts?: number | null
+  priority: TaskPriority
+  source_account_id?: string | null
+  source_folder?: string | null
+  source_uid?: number | null
+}
+
+export interface InviteInfo {
+  uid: string
+  sequence: number
+  organizer_email: string | null
+  organizer_name: string | null
+  summary: string
+  start_ts: number
+  end_ts: number
+  all_day: boolean
+}
+
+export type InviteResponse = 'accepted' | 'declined' | 'tentative'
+
+export interface VacationSettings {
+  account_id: string
+  enabled: boolean
+  start_ts: number | null
+  end_ts: number | null
+  subject: string
+  body: string
+}
+
+export interface NewVacationSettings {
+  enabled: boolean
+  start_ts: number | null
+  end_ts: number | null
+  subject: string
+  body: string
+}
+
+export type SnoozedMessage = MessageSummary & { until_ts: number }
+
+export interface CaldavAccount {
+  id: string
+  label: string
+  url: string
+  username: string
+}
+
+export interface NewCaldavAccount {
+  label: string
+  url: string
+  username: string
+  password: string
+}
+
+export interface AdvancedSearchFilters {
+  from: string
+  dateFrom: string
+  dateTo: string
+  hasAttachment: boolean
+}
+
+export interface Template {
+  id: string
+  name: string
+  subject: string
+  body: string
+}
+
+export interface NewTemplate {
+  name: string
+  subject: string
+  body: string
+}
+
+export interface ComposeMessage {
+  account_id: string
+  to: string
+  cc?: string
+  bcc?: string
+  subject: string
+  body_html: string
+  attachments: OutgoingAttachment[]
+  in_reply_to?: string
+  reply_to?: string
+  request_read_receipt?: boolean
+  importance?: 'high' | 'low'
+}
diff --git a/tsconfig.app.json b/tsconfig.app.json
new file mode 100644
index 0000000..6830b6f
--- /dev/null
+++ b/tsconfig.app.json
@@ -0,0 +1,26 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
+    "target": "es2023",
+    "lib": ["ES2023", "DOM"],
+    "module": "esnext",
+    "types": ["vite/client"],
+    "allowArbitraryExtensions": true,
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+    "jsx": "react-jsx",
+
+    /* Linting */
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true
+  },
+  "include": ["src"]
+}
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..1ffef60
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,7 @@
+{
+  "files": [],
+  "references": [
+    { "path": "./tsconfig.app.json" },
+    { "path": "./tsconfig.node.json" }
+  ]
+}
diff --git a/tsconfig.node.json b/tsconfig.node.json
new file mode 100644
index 0000000..8455dcb
--- /dev/null
+++ b/tsconfig.node.json
@@ -0,0 +1,23 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
+    "target": "es2023",
+    "lib": ["ES2023"],
+    "types": ["node"],
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "module": "nodenext",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+
+    /* Linting */
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true
+  },
+  "include": ["vite.config.ts"]
+}
diff --git a/vite.config.ts b/vite.config.ts
new file mode 100644
index 0000000..8125b42
--- /dev/null
+++ b/vite.config.ts
@@ -0,0 +1,16 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+import tailwindcss from '@tailwindcss/vite'
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [react(), tailwindcss()],
+  clearScreen: false,
+  server: {
+    port: 1420,
+    strictPort: true,
+    watch: {
+      ignored: ['**/src-tauri/**'],
+    },
+  },
+})