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

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>