feat: add camera watch/unwatch with click propagation fix and correct badge color

Add ability to unsubscribe from remote camera tracks via context menu,
with unwatched state tracked in voiceStore. Fix click propagation through
React portals by adding onClick stopPropagation alongside onMouseDown on
both the main context menu and MoveToSubmenu flyout portal containers.
Use rose badge color for unwatched cameras (user choice) instead of amber
(reserved for server-enforced states).

packages/web/src/components/voice/VoiceUser.tsx

@@ -19,6 +19,7 @@ export function VoiceUser({ tile, large }: VoiceUserProps) {
   const isSpeaking = useVoiceStore((s) => s.speakingParticipantIds.has(participant.identity));
   const serverMutedUserIds = useVoiceStore((s) => s.serverMutedUserIds);
   const serverDeafenedUserIds = useVoiceStore((s) => s.serverDeafenedUserIds);
+  const unwatchedCameras = useVoiceStore((s) => s.unwatchedCameras);
   const spaceId = useSpaceStore((s) => currentVoiceChannelId ? s.channelToSpaceMap.get(currentVoiceChannelId) : null);
 
   const [, forceUpdate] = useState(0);
@@ -153,6 +154,16 @@ export function VoiceUser({ tile, large }: VoiceUserProps) {
                       </svg>
                     </div>
                   )}
+                  {!isLocal && participant.isCameraOn && (
+                    <div className={`w-5 h-5 ${unwatchedCameras.has(participant.userId) ? 'bg-accent-rose/90' : 'bg-white/20'} rounded-full flex items-center justify-center`}>
+                      <svg width="12" height="12" viewBox="0 0 24 24" fill="white">
+                        <path d="M17 10.5V7c0-.55-.45-1-1-1H2c-.55 0-1 .45-1 1v10c0 .55.45 1 1 1h14c.55 0 1-.45 1-1v-3.5l4 4v-11l-4 4z" />
+                        {unwatchedCameras.has(participant.userId) && (
+                          <line x1="1" y1="1" x2="23" y2="23" stroke="white" strokeWidth="2" strokeLinecap="round" />
+                        )}
+                      </svg>
+                    </div>
+                  )}
                 </>
               );
             })()}