Fix: Suchfeld Höhe reduziert, Roboter-Symbol aus TopBar entfernt (nicht Sidebar!), Sidebar-Eintrag wiederhergestellt, Lösch-Buttons funktionsfähig mit State, Badge-Zahl dynamisch

frontend/src/components/layout/Sidebar.tsx

@@ -22,6 +22,7 @@ const navItems: NavItem[] = [
   { to: '/calendar', labelKey: 'nav.calendar', icon: navIcon('M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v12a2 2 0 002 2z') },
   { to: '/dms', labelKey: 'nav.files', icon: navIcon('M7 21h10a2 2 0 002-2V9.414a1 1 0 00-.293-.707l-5.414-5.414A1 1 0 0012.586 3H7a2 2 0 00-2 2v14a2 2 0 002 2z') },
   { to: '/mail', labelKey: 'nav.email', icon: navIcon('M3 8l7.89 5.26a2 2 0 002.22 0L21 8M5 19h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v10a2 2 0 002 2z') },
+  { to: '/ai-assistant', labelKey: 'nav.aiAssistant', icon: navIcon('M9.75 17L9 20l-1 1h8l-1-1-.75-3M3 13h18M5 17h14a2 2 0 002-2V5a2 2 0 00-2-2H5a2 2 0 00-2 2v10a2 2 0 002 2z') },
   { to: '/settings', labelKey: 'nav.settings', icon: navIcon('M10.325 4.317c.426-1.756 2.924-1.756 3.35 0a1.724 1.724 0 002.573 1.066c1.543-.94 3.31.826 2.37 2.37a1.724 1.724 0 001.065 2.572c1.756.426 1.756 2.924 0 3.35a1.724 1.724 0 00-1.066 2.573c.94 1.543-.826 3.31-2.37 2.37a1.724 1.724 0 00-2.572 1.065c-.426 1.756-2.924 1.756-3.35 0a1.724 1.724 0 00-2.573-1.066c-1.543.94-3.31-.826-2.37-2.37a1.724 1.724 0 00-1.065-2.572c-1.756-.426-1.756-2.924 0-3.35a1.724 1.724 0 001.066-2.573c-.94-1.543.826-3.31 2.37-2.37.996.608 2.296.07 2.572-1.065z') },
   { to: '/audit-log', labelKey: 'nav.auditLog', icon: navIcon('M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z') },
 ];

frontend/src/components/layout/TopBar.tsx

@@ -20,6 +20,11 @@ export function TopBar() {
 
   const [userMenuOpen, setUserMenuOpen] = useState(false);
   const [notifOpen, setNotifOpen] = useState(false);
+  const [notifications, setNotifications] = useState([
+    'Neuer Kontakt hinzugefügt: Max Mustermann',
+    'Firma aktualisiert: TechCorp GmbH',
+    'Meeting um 14:00 Uhr mit Müller AG',
+  ]);
   const userRef = useRef<HTMLDivElement>(null);
   const notifRef = useRef<HTMLDivElement>(null);
 
@@ -86,9 +91,6 @@ export function TopBar() {
       </div>
 
       <div className="flex items-center gap-2">
-        {/* AI Suggestions Badge */}
-        <SuggestionBadge onClick={openAISidebarProactive} />
-
         {/* Notifications */}
         <div ref={notifRef} className="relative">
           <button
@@ -100,7 +102,7 @@ export function TopBar() {
             <svg className="w-4 h-4 text-secondary-600" fill="none" viewBox="0 0 24 24" stroke="currentColor" aria-hidden="true">
               <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 17h5l-1.405-1.405A2.032 2.032 0 0118 14.158V11a6.002 6.002 0 00-4-5.659V5a2 2 0 10-4 0v.341C7.67 6.165 6 8.388 6 11v3.159c0 .538-.214 1.055-.595 1.436L4 17h5m6 0v1a3 3 0 11-6 0v-1m6 0H9" />
             </svg>
-            <Badge variant="danger" className="absolute -top-1 -right-1 px-1.5 py-0">3</Badge>
+            <Badge variant="danger" className="absolute -top-1 -right-1 px-1.5 py-0">{notifications.length}</Badge>
           </button>
           {notifOpen && (
             <div className="absolute top-full right-0 mt-1 w-80 bg-white rounded-md shadow-lg border border-secondary-200 z-50">
@@ -108,17 +110,16 @@ export function TopBar() {
                 <h3 className="text-sm font-semibold text-secondary-900">{t('topbar.notifications')}</h3>
               </div>
               <ul className="max-h-64 overflow-y-auto py-1" role="list">
-                {[
+                {notifications.length === 0 && (
-                  'Neuer Kontakt hinzugefügt: Max Mustermann',
+                  <li className="px-4 py-3 text-sm text-secondary-400">Keine Benachrichtigungen</li>
-                  'Firma aktualisiert: TechCorp GmbH',
+                )}
-                  'Meeting um 14:00 Uhr mit Müller AG',
+                {notifications.map((msg, i) => (
-                ].map((msg, i) => (
                   <li key={i} className="flex items-center justify-between px-4 py-2 hover:bg-secondary-50 cursor-pointer text-sm text-secondary-700 group">
                     <span className="flex-1 truncate">{msg}</span>
                     <button
                       className="ml-2 p-1 rounded text-secondary-300 hover:text-danger-600 hover:bg-danger-50 opacity-0 group-hover:opacity-100 transition-opacity flex-shrink-0"
                       aria-label="Benachrichtigung löschen"
-                      onClick={(e) => { e.stopPropagation(); }}
+                      onClick={(e) => { e.stopPropagation(); setNotifications(prev => prev.filter((_, idx) => idx !== i)); }}
                     >
                       <svg className="w-3.5 h-3.5" fill="none" viewBox="0 0 24 24" stroke="currentColor" aria-hidden="true">
                         <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />

frontend/src/components/shared/SearchDropdown.tsx

@@ -89,7 +89,7 @@ export function SearchDropdown({ placeholder }: SearchDropdownProps) {
         onFocus={() => query && setOpen(true)}
         onKeyDown={handleKeyDown}
         placeholder={placeholder || t('topbar.search')}
-        className="w-52 pl-10 pr-3 py-1.5 text-sm rounded-md border border-secondary-300 focus:outline-none focus:ring-2 focus:ring-primary-500 min-h-touch"
+        className="w-64 pl-10 pr-3 py-1 text-xs rounded-md border border-secondary-300 focus:outline-none focus:ring-2 focus:ring-primary-500"
         aria-label={t('topbar.search')}
         role="combobox"
         aria-expanded={open}