feat(notifications): add channel routing matrix, daily summary, and task watch button

CHANGELOG.md

@@ -6,6 +6,10 @@ Das Format folgt [Keep a Changelog](https://keepachangelog.com/de/1.1.0/), die V
 
 ## [Unreleased]
 
+### Added
+- Kontoeinstellungen → Alarme: Kanal-Matrix (E-Mail / Discord) für „Fällige Aufgaben (sofort)“, „Freigabe erhalten“, „Geteilte Aufgabe erledigt“ und „Beobachtete Aufgaben“, tägliche Zusammenfassung mit Uhrzeit sowie Schalter zum Pausieren aller Benachrichtigungen und für eigene Änderungen an beobachteten Aufgaben.
+- Aufgaben-Details: Knopf „Beobachten“ / „Nicht mehr beobachten“ (`POST/DELETE /tasks/{id}/watch`).
+
 ### Changed
 - `/diktat` in Notizen: schreibt live mit (mehrzeiliger Text über den Wellen mit Zeitanzeige `mm:ss`), bricht im Browser-Modus bei Sprechpausen nicht mehr ab und schickt im Server-Modus alle ~8 Sekunden bzw. nach kurzen Sprechpausen Abschnitte zur Erkennung vorab.
 

frontend/src/features/settings/UserSettingsView.tsx

@@ -17,7 +17,7 @@ import {
   Pencil,
   Copy,
 } from 'lucide-react';
-import { AuthStatus, User, UserTheme } from '../../lib/types';
+import { AuthStatus, NotificationEvents, NotificationSettings, User, UserTheme } from '../../lib/types';
 import { ApiKeysPanel } from './ApiKeysPanel';
 import { ServerBackupsCard } from './ServerBackupsCard';
 import { saveBlob } from '../../lib/download';
@@ -47,6 +47,48 @@ interface UserSettingsViewProps {
 
 type UserSettingsSection = 'profile' | 'appearance' | 'alarms' | 'webhooks';
 
+export function buildNotificationSettings(user: User): NotificationSettings {
+  const hasLegacy = Array.isArray(user.alarmChannels);
+  const dueEmailDefault = hasLegacy ? user.alarmChannels!.includes('email') : true;
+  const dueDiscordDefault = hasLegacy ? user.alarmChannels!.includes('discord') : true;
+  const s = user.notificationSettings;
+  return {
+    paused: Boolean(s?.paused),
+    includeOwnWatched: Boolean(s?.includeOwnWatched),
+    events: {
+      due: {
+        email: s?.events?.due?.email ?? dueEmailDefault,
+        discord: s?.events?.due?.discord ?? dueDiscordDefault,
+      },
+      shared: {
+        email: s?.events?.shared?.email ?? true,
+        discord: s?.events?.shared?.discord ?? false,
+      },
+      taskDone: {
+        email: s?.events?.taskDone?.email ?? false,
+        discord: s?.events?.taskDone?.discord ?? false,
+      },
+      watched: {
+        email: s?.events?.watched?.email ?? true,
+        discord: s?.events?.watched?.discord ?? true,
+      },
+    },
+    dailySummary: {
+      enabled: s?.dailySummary?.enabled ?? false,
+      time: s?.dailySummary?.time || '07:00',
+      email: s?.dailySummary?.email ?? true,
+      discord: s?.dailySummary?.discord ?? false,
+    },
+  };
+}
+
+const NOTIFICATION_EVENT_ROWS: { key: keyof NotificationEvents; label: string }[] = [
+  { key: 'due', label: 'Fällige Aufgaben (sofort)' },
+  { key: 'shared', label: 'Freigabe erhalten' },
+  { key: 'taskDone', label: 'Geteilte Aufgabe erledigt' },
+  { key: 'watched', label: 'Beobachtete Aufgaben' },
+];
+
 export const UserSettingsView: React.FC<UserSettingsViewProps> = ({
   currentUser,
   activeTheme,
@@ -211,6 +253,9 @@ export const UserSettingsView: React.FC<UserSettingsViewProps> = ({
   const [alarmChannels, setAlarmChannels] = useState<string[]>(
     Array.isArray(currentUser.alarmChannels) ? currentUser.alarmChannels : []
   );
+  const [notificationSettings, setNotificationSettings] = useState<NotificationSettings>(() =>
+    buildNotificationSettings(currentUser)
+  );
   const [alarmEmail, setAlarmEmail] = useState(currentUser.alarmEmail || currentUser.email || '');
   const [discordWebhookUrl, setDiscordWebhookUrl] = useState(currentUser.discordWebhookUrl || '');
   const [customWebhookUrl, setCustomWebhookUrl] = useState(currentUser.customWebhookUrl || '');
@@ -226,6 +271,7 @@ export const UserSettingsView: React.FC<UserSettingsViewProps> = ({
     setEmail(currentUser.email || '');
     setAvatarUrl(currentUser.avatarUrl || '');
     setAlarmChannels(Array.isArray(currentUser.alarmChannels) ? currentUser.alarmChannels : []);
+    setNotificationSettings(buildNotificationSettings(currentUser));
     setAlarmEmail(currentUser.alarmEmail || currentUser.email || '');
     setDiscordWebhookUrl(currentUser.discordWebhookUrl || '');
     setCustomWebhookUrl(currentUser.customWebhookUrl || '');
@@ -238,6 +284,19 @@ export const UserSettingsView: React.FC<UserSettingsViewProps> = ({
     );
   };
 
+  const setEventChannel = (eventKey: keyof NotificationEvents, channel: 'email' | 'discord', value: boolean) => {
+    setNotificationSettings((prev) => ({
+      ...prev,
+      events: {
+        ...prev.events,
+        [eventKey]: {
+          ...prev.events[eventKey],
+          [channel]: value,
+        },
+      },
+    }));
+  };
+
   // --- Handlers: Avatar ---
   const handleAvatarFileSelected = async (e: React.ChangeEvent<HTMLInputElement>) => {
     const file = e.target.files?.[0];
@@ -324,14 +383,23 @@ export const UserSettingsView: React.FC<UserSettingsViewProps> = ({
     setAlarmMsg(null);
     setSavingAlarms(true);
     try {
+      const nextAlarmChannels = [
+        ...(notificationSettings.events.due.email ? ['email'] : []),
+        ...(notificationSettings.events.due.discord ? ['discord'] : []),
+        ...(alarmChannels.includes('webhook') ? ['webhook'] : []),
+      ];
       const updated = await api.updateSettings({
-        alarmChannels,
+        alarmChannels: nextAlarmChannels,
         alarmEmail: alarmEmail.trim(),
         discordWebhookUrl: discordWebhookUrl.trim(),
         customWebhookUrl: customWebhookUrl.trim(),
         notifyBeforeMinutes: Number(notifyBeforeMinutes),
+        notificationSettings,
+      });
+      onUserUpdated({
+        ...updated,
+        notificationSettings: updated.notificationSettings ?? notificationSettings,
       });
-      onUserUpdated(updated);
       setAlarmMsg({ type: 'ok', text: 'Alarm-Kanäle und Vorwarnzeit erfolgreich gespeichert.' });
     } catch (err: any) {
       setAlarmMsg({ type: 'err', text: err.message || 'Fehler beim Speichern der Alarme' });
@@ -1019,6 +1087,176 @@ export const UserSettingsView: React.FC<UserSettingsViewProps> = ({
               )}
 
               <form onSubmit={handleSaveAlarms} className="space-y-4">
+                {/* Global Pause & Own Watched Toggles */}
+                <div className="p-3.5 bg-canvas border border-border space-y-3">
+                  <div className="flex items-center justify-between gap-4">
+                    <div>
+                      <p className="font-semibold text-main">Alle Benachrichtigungen pausieren</p>
+                      <p className="text-[11px] text-muted">
+                        Pausiert vorübergehend sämtliche E-Mail- und Discord-Benachrichtigungen.
+                      </p>
+                    </div>
+                    <ToggleSwitch
+                      checked={notificationSettings.paused}
+                      onChange={(v) => setNotificationSettings((prev) => ({ ...prev, paused: v }))}
+                      title="Alle Benachrichtigungen pausieren"
+                    />
+                  </div>
+                  <div className="flex items-center justify-between gap-4 pt-3 border-t border-border">
+                    <div>
+                      <p className="font-semibold text-main">
+                        Auch eigene Änderungen an beobachteten Aufgaben melden
+                      </p>
+                      <p className="text-[11px] text-muted">
+                        Standardmäßig wirst du nur über Änderungen anderer Personen benachrichtigt.
+                      </p>
+                    </div>
+                    <ToggleSwitch
+                      checked={notificationSettings.includeOwnWatched}
+                      onChange={(v) => setNotificationSettings((prev) => ({ ...prev, includeOwnWatched: v }))}
+                      title="Auch eigene Änderungen an beobachteten Aufgaben melden"
+                    />
+                  </div>
+                </div>
+
+                {/* Routing Matrix: Events x (E-Mail / Discord) */}
+                {(() => {
+                  const hasDiscordWebhook = Boolean(discordWebhookUrl.trim());
+                  return (
+                    <>
+                      <div className="p-4 bg-canvas border border-border space-y-3">
+                        <div className="grid grid-cols-[1fr_auto_auto] items-center gap-4 pb-2 border-b border-border">
+                          <span className="font-bold text-main">Ereignis</span>
+                          <span className="w-16 text-center font-semibold text-muted flex items-center justify-center gap-1">
+                            <Mail className="w-3.5 h-3.5 text-accent" />
+                            <span>E-Mail</span>
+                          </span>
+                          <span className="w-16 text-center font-semibold text-muted flex items-center justify-center gap-1">
+                            <MessageSquare className="w-3.5 h-3.5 text-accent" />
+                            <span>Discord</span>
+                          </span>
+                        </div>
+
+                        <div className="divide-y divide-border">
+                          {NOTIFICATION_EVENT_ROWS.map((row) => {
+                            const routing = notificationSettings.events[row.key];
+                            return (
+                              <div
+                                key={row.key}
+                                className="grid grid-cols-[1fr_auto_auto] items-center gap-4 py-2.5"
+                              >
+                                <span className="font-medium text-main">{row.label}</span>
+                                <div className="w-16 flex justify-center">
+                                  <ToggleSwitch
+                                    checked={routing.email}
+                                    onChange={(v) => setEventChannel(row.key, 'email', v)}
+                                    title={`${row.label} – E-Mail`}
+                                  />
+                                </div>
+                                <div className="w-16 flex justify-center">
+                                  <ToggleSwitch
+                                    checked={routing.discord}
+                                    disabled={!hasDiscordWebhook}
+                                    onChange={(v) => setEventChannel(row.key, 'discord', v)}
+                                    title={
+                                      hasDiscordWebhook
+                                        ? `${row.label} – Discord`
+                                        : 'Bitte zuerst unten eine Discord Webhook URL eintragen'
+                                    }
+                                  />
+                                </div>
+                              </div>
+                            );
+                          })}
+                        </div>
+
+                        <p className="text-[11px] text-faint pt-1">
+                          Gebündelt: höchstens alle 5 Minuten eine Nachricht (außer fällige Aufgaben)
+                        </p>
+                        {!hasDiscordWebhook && (
+                          <p className="text-[11px] text-status-warn">
+                            Discord-Schalter sind deaktiviert, solange unten kein Discord-Webhook eingetragen ist.
+                          </p>
+                        )}
+                      </div>
+
+                      {/* Daily Summary */}
+                      <div className="p-4 bg-canvas border border-border space-y-3">
+                        <div className="flex items-center justify-between gap-4">
+                          <div>
+                            <p className="font-bold text-main">Tageszusammenfassung</p>
+                            <p className="text-[11px] text-muted">
+                              Überfällige, heutige und morgige Aufgaben; nichts fällig = keine Nachricht
+                            </p>
+                          </div>
+                          <ToggleSwitch
+                            checked={notificationSettings.dailySummary.enabled}
+                            onChange={(v) =>
+                              setNotificationSettings((prev) => ({
+                                ...prev,
+                                dailySummary: { ...prev.dailySummary, enabled: v },
+                              }))
+                            }
+                            title="Tageszusammenfassung"
+                          />
+                        </div>
+
+                        <div className="flex flex-wrap items-center justify-between gap-4 pt-2 border-t border-border">
+                          <label className="flex items-center gap-2 text-xs text-main font-medium">
+                            <span>Uhrzeit:</span>
+                            <input
+                              type="time"
+                              aria-label="Uhrzeit der Tageszusammenfassung"
+                              value={notificationSettings.dailySummary.time}
+                              onChange={(e) =>
+                                setNotificationSettings((prev) => ({
+                                  ...prev,
+                                  dailySummary: { ...prev.dailySummary, time: e.target.value },
+                                }))
+                              }
+                              className="h-11 sm:h-8 px-2.5 input-field font-mono"
+                            />
+                          </label>
+
+                          <div className="flex items-center gap-5">
+                            <div className="flex items-center gap-2">
+                              <span className="text-xs text-muted">E-Mail</span>
+                              <ToggleSwitch
+                                checked={notificationSettings.dailySummary.email}
+                                onChange={(v) =>
+                                  setNotificationSettings((prev) => ({
+                                    ...prev,
+                                    dailySummary: { ...prev.dailySummary, email: v },
+                                  }))
+                                }
+                                title="Tageszusammenfassung – E-Mail"
+                              />
+                            </div>
+                            <div className="flex items-center gap-2">
+                              <span className="text-xs text-muted">Discord</span>
+                              <ToggleSwitch
+                                checked={notificationSettings.dailySummary.discord}
+                                disabled={!hasDiscordWebhook}
+                                onChange={(v) =>
+                                  setNotificationSettings((prev) => ({
+                                    ...prev,
+                                    dailySummary: { ...prev.dailySummary, discord: v },
+                                  }))
+                                }
+                                title={
+                                  hasDiscordWebhook
+                                    ? 'Tageszusammenfassung – Discord'
+                                    : 'Bitte zuerst unten eine Discord Webhook URL eintragen'
+                                }
+                              />
+                            </div>
+                          </div>
+                        </div>
+                      </div>
+                    </>
+                  );
+                })()}
+
                 {/* Lead Time Selector */}
                 <div className="p-3.5 bg-canvas border border-border flex flex-col sm:flex-row sm:items-center justify-between gap-3">
                   <div>
@@ -1044,19 +1282,9 @@ export const UserSettingsView: React.FC<UserSettingsViewProps> = ({
                 </div>
 
                 {/* Channel 1: E-Mail */}
-                <div
+                <div className="p-4 border border-border transition-colors space-y-3 bg-canvas">
-                  className={`p-4 border transition-colors space-y-3 bg-canvas ${
-                    alarmChannels.includes('email') ? 'border-accent' : 'border-border'
-                  }`}
-                >
                   <div className="flex items-center justify-between gap-2">
-                    <label className="flex items-center gap-2.5 cursor-pointer select-none">
+                    <div className="flex items-center gap-2.5">
-                      <input
-                        type="checkbox"
-                        checked={alarmChannels.includes('email')}
-                        onChange={() => toggleAlarmChannel('email')}
-                        className="w-4 h-4 accent-blue-600"
-                      />
                       <Mail className="w-4 h-4 text-accent" />
                       <div>
                         <span className="font-bold text-main block">Ziel: E-Mail</span>
@@ -1064,7 +1292,7 @@ export const UserSettingsView: React.FC<UserSettingsViewProps> = ({
                           Sendet eine E-Mail über den konfigurierten SMTP-Server der Instanz.
                         </span>
                       </div>
-                    </label>
+                    </div>
 
                     <button
                       type="button"
@@ -1092,19 +1320,9 @@ export const UserSettingsView: React.FC<UserSettingsViewProps> = ({
                 </div>
 
                 {/* Channel 2: Discord Webhook */}
-                <div
+                <div className="p-4 border border-border transition-colors space-y-3 bg-canvas">
-                  className={`p-4 border transition-colors space-y-3 bg-canvas ${
-                    alarmChannels.includes('discord') ? 'border-accent' : 'border-border'
-                  }`}
-                >
                   <div className="flex items-center justify-between gap-2">
-                    <label className="flex items-center gap-2.5 cursor-pointer select-none">
+                    <div className="flex items-center gap-2.5">
-                      <input
-                        type="checkbox"
-                        checked={alarmChannels.includes('discord')}
-                        onChange={() => toggleAlarmChannel('discord')}
-                        className="w-4 h-4 accent-blue-600"
-                      />
                       <MessageSquare className="w-4 h-4 text-accent" />
                       <div>
                         <span className="font-bold text-main block">Ziel: Discord Webhook</span>
@@ -1113,7 +1331,7 @@ export const UserSettingsView: React.FC<UserSettingsViewProps> = ({
                           Discord-Kanal.
                         </span>
                       </div>
-                    </label>
+                    </div>
 
                     <button
                       type="button"

frontend/src/features/settings/__tests__/UserSettingsView.alarms.test.tsx

@@ -0,0 +1,106 @@
+import React from 'react';
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { render, screen, fireEvent, waitFor } from '@testing-library/react';
+import { UserSettingsView } from '../UserSettingsView';
+import { api } from '../../../lib/api';
+import { User } from '../../../lib/types';
+
+vi.mock('../../../lib/api', async () => {
+  const actual = await vi.importActual<typeof import('../../../lib/api')>('../../../lib/api');
+  return {
+    ...actual,
+    api: {
+      ...actual.api,
+      getMe: vi.fn(async () => ({ isLastAdmin: false })),
+      getAuthStatus: vi.fn(async () => ({ demoMode: false })),
+      updateSettings: vi.fn(async (patch) => ({ ...baseUser, ...patch })),
+    },
+  };
+});
+
+const baseUser: User = {
+  id: 'u1',
+  email: 'anna@example.com',
+  displayName: 'Anna',
+  role: 'member',
+  isActive: true,
+  alarmChannels: ['email'],
+  createdAt: '2026-10-30T00:00:00Z',
+};
+
+describe('UserSettingsView notification matrix', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it('derives events.due from alarmChannels, disables Discord without webhook, and saves the exact notificationSettings object', async () => {
+    const onUserUpdated = vi.fn();
+    render(
+      <UserSettingsView
+        currentUser={baseUser}
+        activeTheme="dark"
+        themes={[]}
+        customThemes={[]}
+        onThemeChange={() => {}}
+        onCustomThemesChange={() => {}}
+        onUserUpdated={onUserUpdated}
+        onBack={() => {}}
+      />
+    );
+
+    // Open "Alarme" section
+    fireEvent.click(screen.getByText('Alarme'));
+
+    // Without Discord webhook, Discord switches are disabled and hint is visible
+    const discordSwitches = screen.getAllByTitle('Bitte zuerst unten eine Discord Webhook URL eintragen');
+    expect(discordSwitches.length).toBe(5);
+    expect((discordSwitches[0] as HTMLButtonElement).disabled).toBe(true);
+    expect(screen.getByText(/Discord-Schalter sind deaktiviert/)).toBeTruthy();
+
+    // Enter a Discord Webhook URL to enable the Discord column
+    fireEvent.change(screen.getByPlaceholderText(/https:\/\/discord\.com\/api\/webhooks/), {
+      target: { value: 'https://discord.com/api/webhooks/123/abc' },
+    });
+
+    // Derive check: alarmChannels=['email'] -> due.email=true, due.discord=false
+    expect(screen.getByTitle('Fällige Aufgaben (sofort) – E-Mail').getAttribute('aria-checked')).toBe('true');
+    expect(screen.getByTitle('Fällige Aufgaben (sofort) – Discord').getAttribute('aria-checked')).toBe('false');
+
+    // Toggle settings in the matrix, daily summary, and global switches
+    fireEvent.click(screen.getByTitle('Fällige Aufgaben (sofort) – Discord'));
+    fireEvent.click(screen.getByTitle('Geteilte Aufgabe erledigt – E-Mail'));
+    fireEvent.click(screen.getByTitle('Beobachtete Aufgaben – Discord'));
+    fireEvent.click(screen.getByTitle('Alle Benachrichtigungen pausieren'));
+    fireEvent.click(screen.getByTitle('Auch eigene Änderungen an beobachteten Aufgaben melden'));
+    fireEvent.click(screen.getByTitle('Tageszusammenfassung'));
+    fireEvent.change(screen.getByLabelText('Uhrzeit der Tageszusammenfassung'), {
+      target: { value: '08:30' },
+    });
+    fireEvent.click(screen.getByTitle('Tageszusammenfassung – Discord'));
+
+    fireEvent.click(screen.getByRole('button', { name: 'Alarm-Einstellungen speichern' }));
+
+    await waitFor(() => expect(api.updateSettings).toHaveBeenCalledTimes(1));
+    expect(api.updateSettings).toHaveBeenCalledWith(
+      expect.objectContaining({
+        discordWebhookUrl: 'https://discord.com/api/webhooks/123/abc',
+        notificationSettings: {
+          paused: true,
+          includeOwnWatched: true,
+          events: {
+            due: { email: true, discord: true },
+            shared: { email: true, discord: false },
+            taskDone: { email: true, discord: false },
+            watched: { email: true, discord: false },
+          },
+          dailySummary: {
+            enabled: true,
+            time: '08:30',
+            email: true,
+            discord: true,
+          },
+        },
+      })
+    );
+  });
+});

frontend/src/features/triage/TaskDetailModal.tsx

@@ -15,11 +15,13 @@ import {
   Lock,
   UserPlus,
   Repeat,
+  Eye,
+  EyeOff,
 } from 'lucide-react';
 import { Thought, TaskList, TaskListMember, KanbanColumn, User, Recurrence } from '../../lib/types';
 import { UserAvatar } from '../../components/UserAvatar';
 import { UserAutocomplete } from '../UserAutocomplete';
-import { triggerHaptic } from '../../lib/api';
+import { api, triggerHaptic } from '../../lib/api';
 import { MarkdownViewer } from '../../lib/markdown';
 import { addDays, joinDue, splitDue } from '../../lib/due';
 
@@ -90,13 +92,32 @@ const TaskDetailModalContent: React.FC<TaskDetailModalProps & { task: Thought }>
 
   const [newSubtaskTitle, setNewSubtaskTitle] = useState('');
   const [newTagDraft, setNewTagDraft] = useState('');
+  const [isWatching, setIsWatching] = useState<boolean>(Boolean(task.isWatching));
+  const [watchBusy, setWatchBusy] = useState(false);
 
   useEffect(() => {
     setTitleDraft(task.content);
     setNotesDraft(task.notes || '');
     setIsEditingTitle(false);
     setIsEditingNotes(false);
-  }, [task.id]);
+    setIsWatching(Boolean(task.isWatching));
+  }, [task.id, task.isWatching]);
+
+  const handleToggleWatch = async () => {
+    if (watchBusy) return;
+    setWatchBusy(true);
+    try {
+      const res = isWatching ? await api.unwatchTask(task.id) : await api.watchTask(task.id);
+      const next = Boolean(res.watching);
+      setIsWatching(next);
+      task.isWatching = next;
+      triggerHaptic(10);
+    } catch {
+      // ignore
+    } finally {
+      setWatchBusy(false);
+    }
+  };
 
   // Handle escape key to close
   useEffect(() => {
@@ -226,6 +247,27 @@ const TaskDetailModalContent: React.FC<TaskDetailModalProps & { task: Thought }>
           </div>
 
           <div className="flex items-center gap-1.5">
+            <button
+              type="button"
+              onClick={handleToggleWatch}
+              disabled={watchBusy}
+              title={isWatching ? 'Nicht mehr beobachten' : 'Beobachten'}
+              className={`btn-action min-h-[44px] sm:min-h-0 h-11 sm:h-7 px-2.5 sm:px-2 text-xs flex items-center gap-1.5 ${
+                isWatching ? 'border-accent text-accent' : ''
+              }`}
+            >
+              {isWatching ? (
+                <>
+                  <EyeOff className="w-4 h-4 sm:w-3.5 sm:h-3.5 text-accent" />
+                  <span>Nicht mehr beobachten</span>
+                </>
+              ) : (
+                <>
+                  <Eye className="w-4 h-4 sm:w-3.5 sm:h-3.5" />
+                  <span>Beobachten</span>
+                </>
+              )}
+            </button>
             {(task.convertedType === 'document_block' || task.docId) ? (
               <button
                 type="button"

frontend/src/features/triage/__tests__/TaskDetailModal.test.tsx

@@ -1,6 +1,7 @@
 import { describe, it, expect, vi } from 'vitest';
-import { render, screen, fireEvent } from '@testing-library/react';
+import { render, screen, fireEvent, waitFor } from '@testing-library/react';
 import { TaskDetailModal } from '../TaskDetailModal';
+import { api } from '../../../lib/api';
 import { Thought } from '../../../lib/types';
 
 const task: Thought = {
@@ -67,4 +68,20 @@ describe('TaskDetailModal', () => {
     expect(screen.getByText('Aufgabe ansehen')).toBeTruthy();
     expect((screen.getByLabelText('Fälligkeitsdatum') as HTMLInputElement).closest('fieldset')?.disabled).toBe(true);
   });
+
+  it('toggles watching a task via POST and DELETE /tasks/{id}/watch', async () => {
+    const watchSpy = vi.spyOn(api, 'watchTask').mockResolvedValue({ watching: true });
+    const unwatchSpy = vi.spyOn(api, 'unwatchTask').mockResolvedValue({ watching: false });
+
+    render(<TaskDetailModal {...props({ task: { ...task, isWatching: false } })} />);
+    const btn = screen.getByRole('button', { name: 'Beobachten' });
+    fireEvent.click(btn);
+
+    await waitFor(() => expect(watchSpy).toHaveBeenCalledWith('th_1'));
+    expect(screen.getByRole('button', { name: 'Nicht mehr beobachten' })).toBeTruthy();
+
+    fireEvent.click(screen.getByRole('button', { name: 'Nicht mehr beobachten' }));
+    await waitFor(() => expect(unwatchSpy).toHaveBeenCalledWith('th_1'));
+    expect(screen.getByRole('button', { name: 'Beobachten' })).toBeTruthy();
+  });
 });

frontend/src/lib/api.ts

@@ -35,6 +35,7 @@ import {
   TagSummary,
   User,
   UserInvite,
+  NotificationSettings,
   VoiceAdminStatus,
   MergeResult,
   WSMessage,
@@ -292,6 +293,7 @@ export const api = {
     discordWebhookUrl?: string;
     customWebhookUrl?: string;
     notifyBeforeMinutes?: number;
+    notificationSettings?: NotificationSettings;
   }): Promise<User> {
     return request<User>('/api/v1/auth/settings', {
       method: 'PATCH',
@@ -410,6 +412,18 @@ export const api = {
     return ensureArray(res);
   },
 
+  async watchTask(taskId: string): Promise<{ watching: boolean }> {
+    return request<{ watching: boolean }>(`/api/v1/tasks/${encodeURIComponent(taskId)}/watch`, {
+      method: 'POST',
+    });
+  },
+
+  async unwatchTask(taskId: string): Promise<{ watching: boolean }> {
+    return request<{ watching: boolean }>(`/api/v1/tasks/${encodeURIComponent(taskId)}/watch`, {
+      method: 'DELETE',
+    });
+  },
+
   async reorderTasks(items: { id: string; sortOrder: number; kanbanStatus?: string }[], taskListId?: string): Promise<{ success: boolean }> {
     const url = taskListId ? `/api/v1/task-lists/${taskListId}/tasks/reorder` : '/api/v1/tasks/reorder';
     return request<{ success: boolean }>(url, {

frontend/src/lib/types.ts

@@ -46,6 +46,32 @@ export interface VoiceAdminStatus {
 // Who can see whom: nobody, members of the same organization, or everybody (Doku/sharing-and-permissions.md)
 export type SharingMode = 'private' | 'organizations' | 'open';
 
+export interface NotificationChannelRouting {
+  email: boolean;
+  discord: boolean;
+}
+
+export interface NotificationEvents {
+  due: NotificationChannelRouting;
+  shared: NotificationChannelRouting;
+  taskDone: NotificationChannelRouting;
+  watched: NotificationChannelRouting;
+}
+
+export interface DailySummarySettings {
+  enabled: boolean;
+  time: string;
+  email: boolean;
+  discord: boolean;
+}
+
+export interface NotificationSettings {
+  paused: boolean;
+  includeOwnWatched: boolean;
+  events: NotificationEvents;
+  dailySummary: DailySummarySettings;
+}
+
 export interface User {
   id: string;
   email: string;
@@ -59,6 +85,7 @@ export interface User {
   discordWebhookUrl?: string;
   customWebhookUrl?: string;
   notifyBeforeMinutes?: number;
+  notificationSettings?: NotificationSettings;
   organizationId?: string;
   createdAt: string;
 }
@@ -113,6 +140,7 @@ export interface Thought {
   subtasks?: SubTask[];
   assignees?: string[]; // user IDs, only people with access to the task list
   recurrence?: Recurrence;
+  isWatching?: boolean;
   alarmSent?: boolean;
   sortOrder?: number;
   createdAt: string;