Clean up stream audio on ending stream

src/app/features/voice/screen-share-viewer/screen-share-viewer.component.ts

@@ -141,9 +141,17 @@ export class ScreenShareViewerComponent implements OnDestroy {
     // Subscribe to remote streams with video (screen shares)
     // NOTE: We no longer auto-display remote streams. Users must click "Live" to view.
     // This subscription is kept for potential future use (e.g., tracking available streams)
-    this.remoteStreamSub = this.webrtcService.onRemoteStream.subscribe(({ peerId, stream }) => {
-      // Do nothing on remote stream - user must explicitly click "Live" to view
-      // The stream is still stored in webrtcService.remoteStreams and can be accessed via getRemoteStream()
+    this.remoteStreamSub = this.webrtcService.onRemoteStream.subscribe(({ peerId }) => {
+      if (peerId !== this.watchingUserId() || this.isLocalShare()) {
+        return;
+      }
+
+      const stream = this.webrtcService.getRemoteScreenShareStream(peerId);
+      const hasActiveVideo = stream?.getVideoTracks().some((track) => track.readyState === 'live') ?? false;
+
+      if (!hasActiveVideo) {
+        this.stopWatching();
+      }
     });
 
     // Listen for focus events dispatched by other components