update FDISK sync

frontend/src/components/chat/ChatMessageView.tsx

@@ -17,6 +17,16 @@ const ChatMessageView: React.FC = () => {
   const queryClient = useQueryClient();
   const messagesEndRef = useRef<HTMLDivElement>(null);
   const [input, setInput] = useState('');
+  const prevActiveRef = useRef(false);
+
+  // Invalidate messages immediately when this room + panel becomes active
+  useEffect(() => {
+    const active = !!selectedRoomToken && chatPanelOpen;
+    if (active && !prevActiveRef.current) {
+      queryClient.invalidateQueries({ queryKey: ['nextcloud', 'messages', selectedRoomToken] });
+    }
+    prevActiveRef.current = active;
+  }, [selectedRoomToken, chatPanelOpen, queryClient]);
 
   const room = rooms.find((r) => r.token === selectedRoomToken);
 

frontend/src/components/shared/NotificationBell.tsx

@@ -26,6 +26,27 @@ import type { Notification, NotificationSchwere } from '../../types/notification
 
 const POLL_INTERVAL_MS = 15_000; // 15 seconds
 
+function playNotificationSound() {
+  try {
+    const ctx = new AudioContext();
+    const oscillator = ctx.createOscillator();
+    const gain = ctx.createGain();
+    oscillator.connect(gain);
+    gain.connect(ctx.destination);
+    oscillator.type = 'sine';
+    oscillator.frequency.value = 600;
+    const now = ctx.currentTime;
+    gain.gain.setValueAtTime(0, now);
+    gain.gain.linearRampToValueAtTime(0.3, now + 0.02);
+    gain.gain.linearRampToValueAtTime(0, now + 0.15);
+    oscillator.start(now);
+    oscillator.stop(now + 0.15);
+    oscillator.onended = () => ctx.close();
+  } catch {
+    // Audio blocked before first user interaction — fail silently
+  }
+}
+
 /**
  * Only allow window.open for URLs whose origin matches the current app origin.
  * External-looking URLs (different host or protocol-relative) are rejected to
@@ -83,6 +104,9 @@ const NotificationBell: React.FC = () => {
 
       // Find notifications we haven't seen before
       const newOnes = unread.filter((n) => !knownIdsRef.current!.has(n.id));
+      if (newOnes.length > 0) {
+        playNotificationSound();
+      }
       newOnes.forEach((n) => {
         knownIdsRef.current!.add(n.id);
         const severity = n.schwere === 'fehler' ? 'error' : n.schwere === 'warnung' ? 'warning' : 'info';