feat(notifications): implement notification system with CRUD operations and UI integration

server/config/database.js

@@ -617,6 +617,38 @@ export async function initDatabase() {
     `);
   }
 
+  // ── Notifications table ──────────────────────────────────────────────────
+  if (isPostgres) {
+    await db.exec(`
+      CREATE TABLE IF NOT EXISTS notifications (
+        id SERIAL PRIMARY KEY,
+        user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+        type TEXT NOT NULL,
+        title TEXT NOT NULL,
+        body TEXT,
+        link TEXT,
+        read INTEGER DEFAULT 0,
+        created_at TIMESTAMP DEFAULT NOW()
+      );
+      CREATE INDEX IF NOT EXISTS idx_notifications_user_id ON notifications(user_id);
+    `);
+  } else {
+    await db.exec(`
+      CREATE TABLE IF NOT EXISTS notifications (
+        id INTEGER PRIMARY KEY AUTOINCREMENT,
+        user_id INTEGER NOT NULL,
+        type TEXT NOT NULL,
+        title TEXT NOT NULL,
+        body TEXT,
+        link TEXT,
+        read INTEGER DEFAULT 0,
+        created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+        FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+      );
+      CREATE INDEX IF NOT EXISTS idx_notifications_user_id ON notifications(user_id);
+    `);
+  }
+
   // ── Default admin (only on very first start) ────────────────────────────
   const adminAlreadySeeded = await db.get("SELECT value FROM settings WHERE key = 'admin_seeded'");
   if (!adminAlreadySeeded) {

server/config/notifications.js

@@ -0,0 +1,23 @@
+import { getDb } from './database.js';
+
+/**
+ * Create an in-app notification for a user.
+ * Non-fatal — exceptions are swallowed so that the main operation is never blocked.
+ *
+ * @param {number} userId   - Recipient user ID
+ * @param {string} type     - Notification type (room_share_added | room_share_removed | federation_invite_received)
+ * @param {string} title    - Short title (e.g. room name or "from" address)
+ * @param {string|null} body  - Optional longer message
+ * @param {string|null} link  - Optional frontend path to navigate to when clicked
+ */
+export async function createNotification(userId, type, title, body = null, link = null) {
+  try {
+    const db = getDb();
+    await db.run(
+      'INSERT INTO notifications (user_id, type, title, body, link) VALUES (?, ?, ?, ?, ?)',
+      [userId, type, title, body, link],
+    );
+  } catch {
+    // Notifications are non-critical — never break main functionality
+  }
+}

server/index.js

@@ -14,6 +14,7 @@ import adminRoutes from './routes/admin.js';
 import brandingRoutes from './routes/branding.js';
 import federationRoutes, { wellKnownHandler } from './routes/federation.js';
 import calendarRoutes from './routes/calendar.js';
+import notificationRoutes from './routes/notifications.js';
 import { startFederationSync } from './jobs/federationSync.js';
 
 const __filename = fileURLToPath(import.meta.url);
@@ -55,6 +56,7 @@ async function start() {
   app.use('/api/branding', brandingRoutes);
   app.use('/api/federation', federationRoutes);
   app.use('/api/calendar', calendarRoutes);
+  app.use('/api/notifications', notificationRoutes);
   // Mount calendar federation receive also under /api/federation for remote instances
   app.use('/api/federation', calendarRoutes);
   app.get('/.well-known/redlight', wellKnownHandler);

server/routes/branding.js

@@ -83,6 +83,8 @@ router.get('/', async (req, res) => {
     const logoFile = findLogoFile();
 
     const registrationMode = await getSetting('registration_mode');
+    const imprintUrl = await getSetting('imprint_url');
+    const privacyUrl = await getSetting('privacy_url');
 
     res.json({
       appName: appName || 'Redlight',
@@ -90,6 +92,8 @@ router.get('/', async (req, res) => {
       logoUrl: logoFile ? '/api/branding/logo' : null,
       defaultTheme: defaultTheme || null,
       registrationMode: registrationMode || 'open',
+      imprintUrl: imprintUrl || null,
+      privacyUrl: privacyUrl || null,
     });
   } catch (err) {
     log.branding.error('Get branding error:', err);
@@ -210,4 +214,42 @@ router.put('/registration-mode', authenticateToken, requireAdmin, async (req, re
   }
 });
 
+// PUT /api/branding/imprint-url - Set imprint URL (admin only)
+router.put('/imprint-url', authenticateToken, requireAdmin, async (req, res) => {
+  try {
+    const { imprintUrl } = req.body;
+    if (imprintUrl && imprintUrl.length > 500) {
+      return res.status(400).json({ error: 'URL must not exceed 500 characters' });
+    }
+    if (imprintUrl && imprintUrl.trim()) {
+      await setSetting('imprint_url', imprintUrl.trim());
+    } else {
+      await deleteSetting('imprint_url');
+    }
+    res.json({ imprintUrl: imprintUrl?.trim() || null });
+  } catch (err) {
+    log.branding.error('Update imprint URL error:', err);
+    res.status(500).json({ error: 'Could not update imprint URL' });
+  }
+});
+
+// PUT /api/branding/privacy-url - Set privacy policy URL (admin only)
+router.put('/privacy-url', authenticateToken, requireAdmin, async (req, res) => {
+  try {
+    const { privacyUrl } = req.body;
+    if (privacyUrl && privacyUrl.length > 500) {
+      return res.status(400).json({ error: 'URL must not exceed 500 characters' });
+    }
+    if (privacyUrl && privacyUrl.trim()) {
+      await setSetting('privacy_url', privacyUrl.trim());
+    } else {
+      await deleteSetting('privacy_url');
+    }
+    res.json({ privacyUrl: privacyUrl?.trim() || null });
+  } catch (err) {
+    log.branding.error('Update privacy URL error:', err);
+    res.status(500).json({ error: 'Could not update privacy URL' });
+  }
+});
+
 export default router;

server/routes/federation.js

@@ -5,6 +5,7 @@ import { getDb } from '../config/database.js';
 import { authenticateToken } from '../middleware/auth.js';
 import { sendFederationInviteEmail, sendCalendarEventDeletedEmail } from '../config/mailer.js';
 import { log } from '../config/logger.js';
+import { createNotification } from '../config/notifications.js';
 
 // M13: rate limit the unauthenticated federation receive endpoint
 const federationReceiveLimiter = rateLimit({
@@ -233,6 +234,15 @@ router.post('/receive', federationReceiveLimiter, async (req, res) => {
           });
         }
 
+        // In-app notification
+        await createNotification(
+          targetUser.id,
+          'federation_invite_received',
+          from_user,
+          room_name,
+          '/federation/inbox',
+        );
+
         res.json({ success: true });
     } catch (err) {
         log.federation.error('Federation receive error:', err);

server/routes/notifications.js

@@ -0,0 +1,48 @@
+import { Router } from 'express';
+import { getDb } from '../config/database.js';
+import { authenticateToken } from '../middleware/auth.js';
+
+const router = Router();
+
+// GET /api/notifications — List recent notifications for the current user
+router.get('/', authenticateToken, async (req, res) => {
+  try {
+    const db = getDb();
+    const notifications = await db.all(
+      `SELECT * FROM notifications WHERE user_id = ? ORDER BY created_at DESC LIMIT 50`,
+      [req.user.id],
+    );
+    const unreadCount = notifications.filter(n => !n.read).length;
+    res.json({ notifications, unreadCount });
+  } catch {
+    res.status(500).json({ error: 'Failed to load notifications' });
+  }
+});
+
+// POST /api/notifications/read-all — Mark all notifications as read
+// NOTE: Must be declared before /:id/read to avoid routing collision
+router.post('/read-all', authenticateToken, async (req, res) => {
+  try {
+    const db = getDb();
+    await db.run('UPDATE notifications SET read = 1 WHERE user_id = ?', [req.user.id]);
+    res.json({ success: true });
+  } catch {
+    res.status(500).json({ error: 'Failed to update notifications' });
+  }
+});
+
+// POST /api/notifications/:id/read — Mark a single notification as read
+router.post('/:id/read', authenticateToken, async (req, res) => {
+  try {
+    const db = getDb();
+    await db.run(
+      'UPDATE notifications SET read = 1 WHERE id = ? AND user_id = ?',
+      [req.params.id, req.user.id],
+    );
+    res.json({ success: true });
+  } catch {
+    res.status(500).json({ error: 'Failed to update notification' });
+  }
+});
+
+export default router;

server/routes/rooms.js

@@ -7,6 +7,7 @@ import { rateLimit } from 'express-rate-limit';
 import { getDb } from '../config/database.js';
 import { authenticateToken } from '../middleware/auth.js';
 import { log } from '../config/logger.js';
+import { createNotification } from '../config/notifications.js';
 import {
   createMeeting,
   joinMeeting,
@@ -402,6 +403,15 @@ router.post('/:uid/shares', authenticateToken, async (req, res) => {
       JOIN users u ON rs.user_id = u.id
       WHERE rs.room_id = ?
     `, [room.id]);
+    // Notify the user who was given access
+    const sharerName = req.user.display_name || req.user.name;
+    await createNotification(
+      user_id,
+      'room_share_added',
+      room.name,
+      sharerName,
+      `/rooms/${room.uid}`,
+    );
     res.json({ shares });
   } catch (err) {
     log.rooms.error(`Share room error: ${err.message}`);
@@ -417,13 +427,22 @@ router.delete('/:uid/shares/:userId', authenticateToken, async (req, res) => {
     if (!room) {
       return res.status(404).json({ error: 'Room not found or no permission' });
     }
-    await db.run('DELETE FROM room_shares WHERE room_id = ? AND user_id = ?', [room.id, parseInt(req.params.userId)]);
+    const removedUserId = parseInt(req.params.userId);
+    await db.run('DELETE FROM room_shares WHERE room_id = ? AND user_id = ?', [room.id, removedUserId]);
     const shares = await db.all(`
       SELECT u.id, u.name, u.display_name, u.email, u.avatar_color, u.avatar_image
       FROM room_shares rs
       JOIN users u ON rs.user_id = u.id
       WHERE rs.room_id = ?
     `, [room.id]);
+    // Notify the user whose access was removed
+    await createNotification(
+      removedUserId,
+      'room_share_removed',
+      room.name,
+      null,
+      '/dashboard',
+    );
     res.json({ shares });
   } catch (err) {
     log.rooms.error(`Remove share error: ${err.message}`);

src/components/Navbar.jsx

@@ -4,6 +4,7 @@ import { useLanguage } from '../contexts/LanguageContext';
 import { useNavigate } from 'react-router-dom';
 import { useState, useRef, useEffect } from 'react';
 import api from '../services/api';
+import NotificationBell from './NotificationBell';
 
 export default function Navbar({ onMenuClick }) {
   const { user, logout } = useAuth();
@@ -51,6 +52,9 @@ export default function Navbar({ onMenuClick }) {
 
         {/* Right section */}
         <div className="flex items-center gap-2">
+          {/* Notification bell */}
+          <NotificationBell />
+
           {/* User dropdown */}
           <div className="relative" ref={dropdownRef}>
             <button

src/components/NotificationBell.jsx

@@ -0,0 +1,167 @@
+import { useRef, useState, useEffect } from 'react';
+import { Bell, BellOff, CheckCheck, ExternalLink } from 'lucide-react';
+import { useNavigate } from 'react-router-dom';
+import { useNotifications } from '../contexts/NotificationContext';
+import { useLanguage } from '../contexts/LanguageContext';
+
+function timeAgo(dateStr, lang) {
+  const diff = Date.now() - new Date(dateStr).getTime();
+  const m = Math.floor(diff / 60_000);
+  const h = Math.floor(diff / 3_600_000);
+  const d = Math.floor(diff / 86_400_000);
+  if (lang === 'de') {
+    if (m < 1)  return 'gerade eben';
+    if (m < 60) return `vor ${m} Min.`;
+    if (h < 24) return `vor ${h} Std.`;
+    return `vor ${d} Tag${d !== 1 ? 'en' : ''}`;
+  }
+  if (m < 1)  return 'just now';
+  if (m < 60) return `${m}m ago`;
+  if (h < 24) return `${h}h ago`;
+  return `${d}d ago`;
+}
+
+function notificationIcon(type) {
+  switch (type) {
+    case 'room_share_added':           return '🔗';
+    case 'room_share_removed':         return '🚫';
+    case 'federation_invite_received': return '📩';
+    default:                           return '🔔';
+  }
+}
+
+function notificationSubtitle(n, t, lang) {
+  switch (n.type) {
+    case 'room_share_added':
+      return n.body
+        ? (lang === 'de' ? `Geteilt von ${n.body}` : `Shared by ${n.body}`)
+        : t('notifications.roomShareAdded');
+    case 'room_share_removed':
+      return t('notifications.roomShareRemoved');
+    case 'federation_invite_received':
+      return n.body
+        ? (lang === 'de' ? `Raum: ${n.body}` : `Room: ${n.body}`)
+        : t('notifications.federationInviteReceived');
+    default:
+      return n.body || '';
+  }
+}
+
+export default function NotificationBell() {
+  const { notifications, unreadCount, markRead, markAllRead } = useNotifications();
+  const { t, language } = useLanguage();
+  const navigate = useNavigate();
+  const [open, setOpen] = useState(false);
+  const containerRef = useRef(null);
+
+  useEffect(() => {
+    function handleOutsideClick(e) {
+      if (containerRef.current && !containerRef.current.contains(e.target)) {
+        setOpen(false);
+      }
+    }
+    document.addEventListener('mousedown', handleOutsideClick);
+    return () => document.removeEventListener('mousedown', handleOutsideClick);
+  }, []);
+
+  const handleNotificationClick = async (n) => {
+    if (!n.read) await markRead(n.id);
+    if (n.link) navigate(n.link);
+    setOpen(false);
+  };
+
+  const recent = notifications.slice(0, 20);
+
+  return (
+    <div className="relative" ref={containerRef}>
+      {/* Bell button */}
+      <button
+        onClick={() => setOpen(prev => !prev)}
+        className="relative p-2 rounded-lg hover:bg-th-hover text-th-text-s transition-colors"
+        title={t('notifications.bell')}
+      >
+        <Bell size={20} />
+        {unreadCount > 0 && (
+          <span className="absolute top-1 right-1 min-w-[16px] h-4 px-0.5 flex items-center justify-center rounded-full bg-th-accent text-th-accent-t text-[10px] font-bold leading-none">
+            {unreadCount > 99 ? '99+' : unreadCount}
+          </span>
+        )}
+      </button>
+
+      {/* Dropdown */}
+      {open && (
+        <div className="absolute right-0 mt-2 w-80 bg-th-card rounded-xl border border-th-border shadow-th-lg overflow-hidden z-50">
+          {/* Header */}
+          <div className="flex items-center justify-between px-4 py-3 border-b border-th-border">
+            <div className="flex items-center gap-2">
+              <Bell size={16} className="text-th-accent" />
+              <span className="text-sm font-semibold text-th-text">{t('notifications.bell')}</span>
+              {unreadCount > 0 && (
+                <span className="px-1.5 py-0.5 rounded-full bg-th-accent text-th-accent-t text-xs font-bold">
+                  {unreadCount}
+                </span>
+              )}
+            </div>
+            {unreadCount > 0 && (
+              <button
+                onClick={markAllRead}
+                className="flex items-center gap-1 text-xs text-th-text-s hover:text-th-accent transition-colors"
+                title={t('notifications.markAllRead')}
+              >
+                <CheckCheck size={14} />
+                {t('notifications.markAllRead')}
+              </button>
+            )}
+          </div>
+
+          {/* List */}
+          <div className="max-h-80 overflow-y-auto">
+            {recent.length === 0 ? (
+              <div className="flex flex-col items-center justify-center py-8 text-th-text-s gap-2">
+                <BellOff size={24} />
+                <span className="text-sm">{t('notifications.noNotifications')}</span>
+              </div>
+            ) : (
+              <ul>
+                {recent.map(n => (
+                  <li
+                    key={n.id}
+                    onClick={() => handleNotificationClick(n)}
+                    className={`flex items-start gap-3 px-4 py-3 cursor-pointer transition-colors border-b border-th-border/50 last:border-0
+                      ${n.read ? 'hover:bg-th-hover' : 'bg-th-accent/5 hover:bg-th-accent/10'}`}
+                  >
+                    {/* Icon */}
+                    <span className="text-lg flex-shrink-0 mt-0.5">{notificationIcon(n.type)}</span>
+
+                    {/* Content */}
+                    <div className="flex-1 min-w-0">
+                      <p className={`text-sm truncate ${n.read ? 'text-th-text-s' : 'text-th-text font-medium'}`}>
+                        {n.title}
+                      </p>
+                      <p className="text-xs text-th-text-s truncate">
+                        {notificationSubtitle(n, t, language)}
+                      </p>
+                      <p className="text-xs text-th-text-s/70 mt-0.5">
+                        {timeAgo(n.created_at, language)}
+                      </p>
+                    </div>
+
+                    {/* Unread dot + link indicator */}
+                    <div className="flex flex-col items-end gap-1 flex-shrink-0">
+                      {!n.read && (
+                        <span className="w-2 h-2 rounded-full bg-th-accent mt-1" />
+                      )}
+                      {n.link && (
+                        <ExternalLink size={12} className="text-th-text-s/50" />
+                      )}
+                    </div>
+                  </li>
+                ))}
+              </ul>
+            )}
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}

src/components/Sidebar.jsx

@@ -1,8 +1,9 @@
 import { NavLink } from 'react-router-dom';
-import { LayoutDashboard, Settings, Shield, X, Palette, Globe, CalendarDays } from 'lucide-react';
+import { LayoutDashboard, Settings, Shield, X, Palette, Globe, CalendarDays, FileText, Lock } from 'lucide-react';
 import BrandLogo from './BrandLogo';
 import { useAuth } from '../contexts/AuthContext';
 import { useLanguage } from '../contexts/LanguageContext';
+import { useBranding } from '../contexts/BrandingContext';
 import ThemeSelector from './ThemeSelector';
 import { useState, useEffect } from 'react';
 import api from '../services/api';
@@ -10,6 +11,7 @@ import api from '../services/api';
 export default function Sidebar({ open, onClose }) {
   const { user } = useAuth();
   const { t } = useLanguage();
+  const { imprintUrl, privacyUrl } = useBranding();
   const [themeOpen, setThemeOpen] = useState(false);
   const [federationCount, setFederationCount] = useState(0);
 
@@ -122,6 +124,37 @@ export default function Sidebar({ open, onClose }) {
                 <p className="text-xs text-th-text-s truncate">@{user?.name}</p>
               </div>
             </div>
+
+            {/* Imprint / Privacy Policy links */}
+            {(imprintUrl || privacyUrl) && (
+              <div className="flex items-center gap-3 mt-3 pt-3 border-t border-th-border/60">
+                {imprintUrl && (
+                  <a
+                    href={imprintUrl}
+                    target="_blank"
+                    rel="noopener noreferrer"
+                    className="flex items-center gap-1 text-xs text-th-text-s hover:text-th-accent transition-colors"
+                  >
+                    <FileText size={11} />
+                    {t('nav.imprint')}
+                  </a>
+                )}
+                {imprintUrl && privacyUrl && (
+                  <span className="text-th-border text-xs">·</span>
+                )}
+                {privacyUrl && (
+                  <a
+                    href={privacyUrl}
+                    target="_blank"
+                    rel="noopener noreferrer"
+                    className="flex items-center gap-1 text-xs text-th-text-s hover:text-th-accent transition-colors"
+                  >
+                    <Lock size={11} />
+                    {t('nav.privacy')}
+                  </a>
+                )}
+              </div>
+            )}
           </div>
         </div>
       </aside>

src/contexts/BrandingContext.jsx

@@ -11,6 +11,8 @@ export function BrandingProvider({ children }) {
     hasLogo: false,
     logoUrl: null,
     defaultTheme: null,
+    imprintUrl: null,
+    privacyUrl: null,
   });
 
   const fetchBranding = useCallback(async () => {

src/contexts/NotificationContext.jsx

@@ -0,0 +1,94 @@
+import { createContext, useContext, useState, useEffect, useRef, useCallback } from 'react';
+import toast from 'react-hot-toast';
+import { useAuth } from './AuthContext';
+import api from '../services/api';
+
+const NotificationContext = createContext();
+
+export function NotificationProvider({ children }) {
+  const { user } = useAuth();
+  const [notifications, setNotifications] = useState([]);
+  const [unreadCount, setUnreadCount] = useState(0);
+  // Track seen IDs to detect genuinely new arrivals and show toasts
+  const seenIds = useRef(new Set());
+  const initialized = useRef(false);
+
+  const fetch = useCallback(async () => {
+    if (!user) return;
+    try {
+      const res = await api.get('/notifications');
+      const incoming = res.data.notifications || [];
+      setNotifications(incoming);
+      setUnreadCount(res.data.unreadCount || 0);
+
+      // First fetch: just seed the seen-set without toasting
+      if (!initialized.current) {
+        incoming.forEach(n => seenIds.current.add(n.id));
+        initialized.current = true;
+        return;
+      }
+
+      // Subsequent fetches: toast new unread notifications
+      const newItems = incoming.filter(n => !n.read && !seenIds.current.has(n.id));
+      newItems.forEach(n => {
+        seenIds.current.add(n.id);
+        const icon = notificationIcon(n.type);
+        toast(`${icon} ${n.title}`, { duration: 5000 });
+      });
+    } catch {
+      /* silent – server may not be reachable */
+    }
+  }, [user]);
+
+  useEffect(() => {
+    if (!user) {
+      setNotifications([]);
+      setUnreadCount(0);
+      seenIds.current = new Set();
+      initialized.current = false;
+      return;
+    }
+    fetch();
+    const interval = setInterval(fetch, 30_000);
+    return () => clearInterval(interval);
+  }, [user, fetch]);
+
+  const markRead = async (id) => {
+    try {
+      await api.post(`/notifications/${id}/read`);
+      setNotifications(prev =>
+        prev.map(n => (n.id === id ? { ...n, read: 1 } : n)),
+      );
+      setUnreadCount(prev => Math.max(0, prev - 1));
+    } catch { /* silent */ }
+  };
+
+  const markAllRead = async () => {
+    try {
+      await api.post('/notifications/read-all');
+      setNotifications(prev => prev.map(n => ({ ...n, read: 1 })));
+      setUnreadCount(0);
+    } catch { /* silent */ }
+  };
+
+  return (
+    <NotificationContext.Provider value={{ notifications, unreadCount, markRead, markAllRead, refresh: fetch }}>
+      {children}
+    </NotificationContext.Provider>
+  );
+}
+
+export function useNotifications() {
+  const ctx = useContext(NotificationContext);
+  if (!ctx) throw new Error('useNotifications must be used within NotificationProvider');
+  return ctx;
+}
+
+function notificationIcon(type) {
+  switch (type) {
+    case 'room_share_added':       return '🔗';
+    case 'room_share_removed':     return '🚫';
+    case 'federation_invite_received': return '📩';
+    default:                       return '🔔';
+  }
+}

src/i18n/de.json

@@ -33,7 +33,9 @@
     "changeTheme": "Theme ändern",
     "navigation": "Navigation",
     "calendar": "Kalender",
-    "federation": "Einladungen"
+    "federation": "Einladungen",
+    "imprint": "Impressum",
+    "privacy": "Datenschutz"
   },
   "auth": {
     "login": "Anmelden",
@@ -356,7 +358,23 @@
     "inviteExpired": "Abgelaufen",
     "inviteUsedBy": "Verwendet von",
     "inviteExpiresAt": "Läuft ab am",
-    "noInvites": "Noch keine Einladungen"
+    "noInvites": "Noch keine Einladungen",
+    "legalLinksTitle": "Rechtliche Links",
+    "legalLinksDesc": "Impressum- und Datenschutz-Links am unteren Rand der Seitenleiste anzeigen. Leer lassen zum Ausblenden.",
+    "imprintUrl": "Impressum-URL",
+    "privacyUrl": "Datenschutz-URL",
+    "imprintUrlSaved": "Impressum-URL gespeichert",
+    "privacyUrlSaved": "Datenschutz-URL gespeichert",
+    "imprintUrlFailed": "Impressum-URL konnte nicht gespeichert werden",
+    "privacyUrlFailed": "Datenschutz-URL konnte nicht gespeichert werden"
+  },
+  "notifications": {
+    "bell": "Benachrichtigungen",
+    "markAllRead": "Alle als gelesen markieren",
+    "noNotifications": "Keine Benachrichtigungen",
+    "roomShareAdded": "Raum wurde mit dir geteilt",
+    "roomShareRemoved": "Raumzugriff wurde entfernt",
+    "federationInviteReceived": "Neue Meeting-Einladung"
   },
   "federation": {
     "inbox": "Einladungen",

src/i18n/en.json

@@ -33,7 +33,9 @@
     "changeTheme": "Change theme",
     "navigation": "Navigation",
     "calendar": "Calendar",
-    "federation": "Invitations"
+    "federation": "Invitations",
+    "imprint": "Imprint",
+    "privacy": "Privacy Policy"
   },
   "auth": {
     "login": "Sign in",
@@ -356,7 +358,23 @@
     "inviteExpired": "Expired",
     "inviteUsedBy": "Used by",
     "inviteExpiresAt": "Expires",
-    "noInvites": "No invitations yet"
+    "noInvites": "No invitations yet",
+    "legalLinksTitle": "Legal Links",
+    "legalLinksDesc": "Show Imprint and Privacy Policy links at the bottom of the sidebar. Leave blank to hide.",
+    "imprintUrl": "Imprint URL",
+    "privacyUrl": "Privacy Policy URL",
+    "imprintUrlSaved": "Imprint URL saved",
+    "privacyUrlSaved": "Privacy Policy URL saved",
+    "imprintUrlFailed": "Could not save Imprint URL",
+    "privacyUrlFailed": "Could not save Privacy Policy URL"
+  },
+  "notifications": {
+    "bell": "Notifications",
+    "markAllRead": "Mark all as read",
+    "noNotifications": "No notifications yet",
+    "roomShareAdded": "Room shared with you",
+    "roomShareRemoved": "Room access removed",
+    "federationInviteReceived": "New meeting invitation"
   },
   "federation": {
     "inbox": "Invitations",

src/main.jsx

@@ -7,6 +7,7 @@ import { AuthProvider } from './contexts/AuthContext';
 import { ThemeProvider } from './contexts/ThemeContext';
 import { LanguageProvider } from './contexts/LanguageContext';
 import { BrandingProvider } from './contexts/BrandingContext';
+import { NotificationProvider } from './contexts/NotificationContext';
 import './index.css';
 
 ReactDOM.createRoot(document.getElementById('root')).render(
@@ -16,18 +17,20 @@ ReactDOM.createRoot(document.getElementById('root')).render(
         <ThemeProvider>
           <BrandingProvider>
             <AuthProvider>
-              <App />
+              <NotificationProvider>
-              <Toaster
+                <App />
-                position="top-right"
+                <Toaster
-                toastOptions={{
+                  position="top-right"
-                  duration: 4000,
+                  toastOptions={{
-                  style: {
+                    duration: 4000,
-                    background: 'var(--card-bg)',
+                    style: {
-                    color: 'var(--text-primary)',
+                      background: 'var(--card-bg)',
-                    border: '1px solid var(--border)',
+                      color: 'var(--text-primary)',
-                  },
+                      border: '1px solid var(--border)',
-                }}
+                    },
-              />
+                  }}
+                />
+              </NotificationProvider>
             </AuthProvider>
           </BrandingProvider>
         </ThemeProvider>

src/pages/Admin.jsx

@@ -4,7 +4,7 @@ import {
   Users, Shield, Search, Trash2, ChevronDown, Loader2,
   MoreVertical, Key, UserCheck, UserX, UserPlus, Mail, Lock, User,
   Upload, X as XIcon, Image, Type, Palette, Send, Copy, Clock, Check,
-  ShieldCheck, Globe,
+  ShieldCheck, Globe, Link as LinkIcon,
 } from 'lucide-react';
 import { useAuth } from '../contexts/AuthContext';
 import { useLanguage } from '../contexts/LanguageContext';
@@ -16,7 +16,7 @@ import toast from 'react-hot-toast';
 export default function Admin() {
   const { user } = useAuth();
   const { t, language } = useLanguage();
-  const { appName, hasLogo, logoUrl, defaultTheme, registrationMode, refreshBranding } = useBranding();
+  const { appName, hasLogo, logoUrl, defaultTheme, registrationMode, imprintUrl, privacyUrl, refreshBranding } = useBranding();
   const navigate = useNavigate();
   const [users, setUsers] = useState([]);
   const [loading, setLoading] = useState(true);
@@ -43,6 +43,10 @@ export default function Admin() {
   const logoInputRef = useRef(null);
   const [editDefaultTheme, setEditDefaultTheme] = useState('');
   const [savingDefaultTheme, setSavingDefaultTheme] = useState(false);
+  const [editImprintUrl, setEditImprintUrl] = useState('');
+  const [savingImprintUrl, setSavingImprintUrl] = useState(false);
+  const [editPrivacyUrl, setEditPrivacyUrl] = useState('');
+  const [savingPrivacyUrl, setSavingPrivacyUrl] = useState(false);
 
   useEffect(() => {
     if (user?.role !== 'admin') {
@@ -61,6 +65,14 @@ export default function Admin() {
     setEditDefaultTheme(defaultTheme || 'dark');
   }, [defaultTheme]);
 
+  useEffect(() => {
+    setEditImprintUrl(imprintUrl || '');
+  }, [imprintUrl]);
+
+  useEffect(() => {
+    setEditPrivacyUrl(privacyUrl || '');
+  }, [privacyUrl]);
+
   const fetchUsers = async () => {
     try {
       const res = await api.get('/admin/users');
@@ -237,6 +249,32 @@ export default function Admin() {
     }
   };
 
+  const handleImprintUrlSave = async () => {
+    setSavingImprintUrl(true);
+    try {
+      await api.put('/branding/imprint-url', { imprintUrl: editImprintUrl.trim() });
+      toast.success(t('admin.imprintUrlSaved'));
+      refreshBranding();
+    } catch {
+      toast.error(t('admin.imprintUrlFailed'));
+    } finally {
+      setSavingImprintUrl(false);
+    }
+  };
+
+  const handlePrivacyUrlSave = async () => {
+    setSavingPrivacyUrl(true);
+    try {
+      await api.put('/branding/privacy-url', { privacyUrl: editPrivacyUrl.trim() });
+      toast.success(t('admin.privacyUrlSaved'));
+      refreshBranding();
+    } catch {
+      toast.error(t('admin.privacyUrlFailed'));
+    } finally {
+      setSavingPrivacyUrl(false);
+    }
+  };
+
   const filteredUsers = users.filter(u =>
     (u.display_name || u.name).toLowerCase().includes(search.toLowerCase()) ||
     u.email.toLowerCase().includes(search.toLowerCase())
@@ -381,6 +419,59 @@ export default function Admin() {
             </button>
           </div>
         </div>
+
+        {/* Legal links */}
+        <div className="mt-6 pt-6 border-t border-th-border">
+          <div className="flex items-center gap-2 mb-1">
+            <LinkIcon size={16} className="text-th-accent" />
+            <label className="block text-sm font-medium text-th-text">{t('admin.legalLinksTitle')}</label>
+          </div>
+          <p className="text-xs text-th-text-s mb-4">{t('admin.legalLinksDesc')}</p>
+          <div className="grid gap-4 sm:grid-cols-2">
+            {/* Imprint */}
+            <div>
+              <label className="block text-xs font-medium text-th-text-s mb-1">{t('admin.imprintUrl')}</label>
+              <div className="flex items-center gap-2">
+                <input
+                  type="url"
+                  value={editImprintUrl}
+                  onChange={e => setEditImprintUrl(e.target.value)}
+                  className="input-field text-sm flex-1"
+                  placeholder="https://example.com/imprint"
+                  maxLength={500}
+                />
+                <button
+                  onClick={handleImprintUrlSave}
+                  disabled={savingImprintUrl || editImprintUrl === (imprintUrl || '')}
+                  className="btn-primary text-sm px-4 flex-shrink-0"
+                >
+                  {savingImprintUrl ? <Loader2 size={14} className="animate-spin" /> : t('common.save')}
+                </button>
+              </div>
+            </div>
+            {/* Privacy Policy */}
+            <div>
+              <label className="block text-xs font-medium text-th-text-s mb-1">{t('admin.privacyUrl')}</label>
+              <div className="flex items-center gap-2">
+                <input
+                  type="url"
+                  value={editPrivacyUrl}
+                  onChange={e => setEditPrivacyUrl(e.target.value)}
+                  className="input-field text-sm flex-1"
+                  placeholder="https://example.com/privacy"
+                  maxLength={500}
+                />
+                <button
+                  onClick={handlePrivacyUrlSave}
+                  disabled={savingPrivacyUrl || editPrivacyUrl === (privacyUrl || '')}
+                  className="btn-primary text-sm px-4 flex-shrink-0"
+                >
+                  {savingPrivacyUrl ? <Loader2 size={14} className="animate-spin" /> : t('common.save')}
+                </button>
+              </div>
+            </div>
+          </div>
+        </div>
       </div>
 
       {/* Registration Mode */}