fix(client): the local player is silent while casting

It keeps playing to pace the relay, so it doubled the television's sound.
The viewer's mute setting comes back when the cast ends.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/packages/meshbay-hub/src/meshbay_hub/static/video-player.js b/packages/meshbay-hub/src/meshbay_hub/static/video-player.js
index 4fa652b..243e0c2 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/video-player.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/video-player.js
@@ -1471,6 +1471,24 @@ function VideoPlayer({ entry, transportRef, gekRef, onClose, onDownload }) {
   // The scan lives as long as the picker is open: closing it, or picking a
   // receiver, stops the updates. Receivers are listed as they answer, and the
   // spinner sits below them so one landing never moves the row being aimed at.
+  // While casting, the film plays on the receiver; the local element keeps
+  // playing — its playhead is what paces the stream the relay forwards — but
+  // silently. It went on with its sound, so a phone in the room doubled the
+  // television's audio, screen off included. What the viewer had set comes
+  // back when the cast ends.
+  const mutedBeforeCastRef = useRef(null);
+  useEffect(() => {
+    const v = videoRef.current;
+    if (!v) return;
+    if (castActive) {
+      if (mutedBeforeCastRef.current === null) mutedBeforeCastRef.current = v.muted;
+      v.muted = true;
+    } else if (mutedBeforeCastRef.current !== null) {
+      v.muted = mutedBeforeCastRef.current;
+      mutedBeforeCastRef.current = null;
+    }
+  }, [castActive]);
+
   useEffect(() => {
     if (!castPickerOpen) return undefined;
     setCastDevices([]);