Fix: Seek funktioniert jetzt für alle User — report_time überschreibt Seek nicht mehr

- Server: report_time ignoriert Host-Updates für 2s nach einem Seek
- Frontend: seekingRef Guard auf 3s erhöht um Sync-Pulse-Rücksetzung zu verhindern

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

server/src/plugins/watch-together/index.ts

@@ -459,7 +459,12 @@ async function handleMessage(client: WtClient, msg: any): Promise<void> {
       if (!client.roomId) return;
       const room = rooms.get(client.roomId);
       if (!room) return;
+      // Only accept time reports from the host to avoid conflicts
+      // when multiple users report different times
       if (room.hostId !== client.id) return;
+      // Ignore if a seek happened recently (within 2s) to prevent overwriting
+      const timeSinceSync = Date.now() - room.lastSyncAt;
+      if (timeSinceSync < 2000) return;
       room.currentTime = Number(msg.time) || 0;
       room.lastSyncAt = Date.now();
       break;

web/src/plugins/watch-together/WatchTogetherTab.tsx

@@ -690,7 +690,7 @@ export default function WatchTogetherTab({ data }: { data: any }) {
       dmPlayerRef.current.contentWindow.postMessage(`seek?to=${time}`, 'https://www.dailymotion.com');
     }
     setCurrentTime(time);
-    setTimeout(() => { seekingRef.current = false; }, 1000);
+    setTimeout(() => { seekingRef.current = false; }, 3000);
   }, [wsSend]);
 
   // ── Host time reporting ──