Fix: Stream-Link Auto-Join Race Condition + Autoplay

- remoteStreamRef speichert MediaStream aus ontrack, damit er nicht
  verloren geht wenn das <video>-Element noch nicht gemountet ist
- useEffect verbindet Stream mit Video sobald beides bereit ist
- Explizites play() mit Mute-Fallback bei Autoplay-Blockierung
  (neuer Tab ohne User-Interaktion, z.B. Discord-Link)
- Debug-Logging aus Notification-Config entfernt

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/plugins/notifications/index.ts

@@ -224,7 +224,6 @@ const notificationsPlugin: Plugin = {
 
     // Save config
     app.post('/api/notifications/config', requireAdmin, (req, res) => {
-      console.log(`${NB} Save request body:`, JSON.stringify(req.body));
       const { channels } = req.body ?? {};
       if (!Array.isArray(channels)) { res.status(400).json({ error: 'channels array erforderlich' }); return; }
       // Validate each channel config

web/src/plugins/streaming/StreamingTab.tsx

@@ -80,6 +80,7 @@ export default function StreamingTab({ data }: { data: any }) {
   const remoteVideoRef = useRef<HTMLVideoElement | null>(null);
   const peerConnectionsRef = useRef<Map<string, RTCPeerConnection>>(new Map());
   const viewerPcRef = useRef<RTCPeerConnection | null>(null);
+  const remoteStreamRef = useRef<MediaStream | null>(null);
   const pendingCandidatesRef = useRef<Map<string, RTCIceCandidateInit[]>>(new Map());
   const reconnectTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
   const reconnectDelayRef = useRef(1000);
@@ -161,12 +162,27 @@ export default function StreamingTab({ data }: { data: any }) {
     }
   }, []);
 
+  // ── Attach remote stream to video element (handles autoplay) ──
+  const attachRemoteStream = useCallback((videoEl: HTMLVideoElement, stream: MediaStream) => {
+    videoEl.srcObject = stream;
+    // Explicit play() to handle autoplay restrictions (e.g. fresh tab from Discord link)
+    const playPromise = videoEl.play();
+    if (playPromise) {
+      playPromise.catch(() => {
+        // Autoplay blocked (no user interaction yet) → mute and retry
+        videoEl.muted = true;
+        videoEl.play().catch(() => {});
+      });
+    }
+  }, []);
+
   // ── Viewer cleanup (only viewer PC, keeps broadcaster intact) ──
   const cleanupViewer = useCallback(() => {
     if (viewerPcRef.current) {
       viewerPcRef.current.close();
       viewerPcRef.current = null;
     }
+    remoteStreamRef.current = null;
     if (remoteVideoRef.current) remoteVideoRef.current.srcObject = null;
     // Only clear viewer-related pending candidates (not broadcaster ones)
   }, []);
@@ -275,7 +291,15 @@ export default function StreamingTab({ data }: { data: any }) {
         viewerPcRef.current = pc;
 
         pc.ontrack = (ev) => {
-          if (remoteVideoRef.current && ev.streams[0]) remoteVideoRef.current.srcObject = ev.streams[0];
+          const stream = ev.streams[0];
+          if (!stream) return;
+          // Store stream in ref so it survives even if video element isn't mounted yet
+          remoteStreamRef.current = stream;
+          const videoEl = remoteVideoRef.current;
+          if (videoEl) {
+            attachRemoteStream(videoEl, stream);
+          }
+          // else: useEffect below will attach once video element is ready
           setViewing(prev => prev ? { ...prev, phase: 'connected' } : prev);
         };
 
@@ -512,6 +536,14 @@ export default function StreamingTab({ data }: { data: any }) {
     };
   }, []);
 
+  // ── Attach remote stream when video element becomes available ──
+  // Handles the race condition where ontrack fires before React renders the <video>
+  useEffect(() => {
+    if (viewing && remoteStreamRef.current && remoteVideoRef.current && !remoteVideoRef.current.srcObject) {
+      attachRemoteStream(remoteVideoRef.current, remoteStreamRef.current);
+    }
+  }, [viewing, attachRemoteStream]);
+
   // ── Auto-join from URL ?viewStream=... ──
   const pendingViewStreamRef = useRef<string | null>(null);
 
@@ -613,7 +645,6 @@ export default function StreamingTab({ data }: { data: any }) {
   }, [isAdmin, loadNotifyConfig]);
 
   const toggleChannelEvent = useCallback((channelId: string, channelName: string, guildId: string, guildName: string, event: string) => {
-    console.log('[Notifications] Toggle:', channelId, channelName, event);
     setNotifyConfig(prev => {
       const existing = prev.find(c => c.channelId === channelId);
       if (existing) {
@@ -632,7 +663,6 @@ export default function StreamingTab({ data }: { data: any }) {
   }, []);
 
   const saveNotifyConfig = useCallback(async () => {
-    console.log('[Notifications] Saving config, notifyConfig:', JSON.stringify(notifyConfig));
     setConfigSaving(true);
     try {
       const resp = await fetch('/api/notifications/config', {