fix live analysis multi-device lock

client/src/pages/LiveCamera.tsx

@@ -549,6 +549,7 @@ export default function LiveCamera() {
   const broadcastSessionIdRef = useRef<string | null>(null);
   const viewerPeerRef = useRef<RTCPeerConnection | null>(null);
   const viewerSessionIdRef = useRef<string | null>(null);
+  const viewerRetryTimerRef = useRef<number>(0);
   const runtimeIdRef = useRef<number | null>(null);
   const heartbeatTimerRef = useRef<number>(0);
   const recorderRef = useRef<MediaRecorder | null>(null);
@@ -883,6 +884,10 @@ export default function LiveCamera() {
   }, []);
 
   const closeViewerPeer = useCallback(() => {
+    if (viewerRetryTimerRef.current) {
+      window.clearTimeout(viewerRetryTimerRef.current);
+      viewerRetryTimerRef.current = 0;
+    }
     viewerSessionIdRef.current = null;
     if (viewerPeerRef.current) {
       viewerPeerRef.current.ontrack = null;
@@ -1026,15 +1031,22 @@ export default function LiveCamera() {
     await peer.setLocalDescription(offer);
     await waitForIceGathering(peer);
 
-    const answer = await signalMediaViewerSession(mediaSessionId, {
-      sdp: peer.localDescription?.sdp || "",
-      type: peer.localDescription?.type || "offer",
-    });
+    try {
+      const answer = await signalMediaViewerSession(mediaSessionId, {
+        sdp: peer.localDescription?.sdp || "",
+        type: peer.localDescription?.type || "offer",
+      });
 
-    await peer.setRemoteDescription({
-      type: answer.type as RTCSdpType,
-      sdp: answer.sdp,
-    });
+      await peer.setRemoteDescription({
+        type: answer.type as RTCSdpType,
+        sdp: answer.sdp,
+      });
+    } catch (error) {
+      if (viewerPeerRef.current === peer) {
+        closeViewerPeer();
+      }
+      throw error;
+    }
   }, [closeViewerPeer]);
 
   const stopCamera = useCallback(() => {
@@ -1087,11 +1099,27 @@ export default function LiveCamera() {
 
     void startViewerStream(runtimeSession.mediaSessionId).catch((error: any) => {
       const message = error?.message || "同步画面连接失败";
-      if (!/409/.test(message)) {
-        setViewerError(message);
+      if (/409|viewer stream not ready/i.test(message)) {
+        setViewerError("持有端正在准备同步画面，正在自动重试...");
+        if (!viewerRetryTimerRef.current) {
+          viewerRetryTimerRef.current = window.setTimeout(() => {
+            viewerRetryTimerRef.current = 0;
+            void runtimeQuery.refetch();
+          }, 1200);
+        }
+        return;
       }
+      setViewerError(message);
     });
-  }, [cameraActive, closeViewerPeer, runtimeRole, runtimeSession?.mediaSessionId, startViewerStream]);
+  }, [
+    cameraActive,
+    closeViewerPeer,
+    runtimeQuery.refetch,
+    runtimeQuery.dataUpdatedAt,
+    runtimeRole,
+    runtimeSession?.mediaSessionId,
+    startViewerStream,
+  ]);
 
   useEffect(() => {
     return () => {