fix: broadcast camera & screen share status via WebSocket for sidebar visibility

Camera and LIVE badges in the channel sidebar were only visible to users
who had joined the same LiveKit room. Widen the voice_status WS event
from {isMuted, isDeafened} to {isMuted, isDeafened, isCameraOn, isScreenSharing}
so all server members see camera/screenshare indicators without joining voice.

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

@@ -57,8 +57,8 @@ export function VoiceChannel({ channelId, channelName, onClick }: VoiceChannelPr
             const isMuted = userId === currentUserId
               ? localIsMuted
               : (participant?.isMuted ?? wsStatus?.isMuted ?? false);
-            const hasCamera = participant?.isCameraOn ?? false;
-            const isScreenSharing = participant?.isScreenSharing ?? false;
+            const hasCamera = participant?.isCameraOn ?? wsStatus?.isCameraOn ?? false;
+            const isScreenSharing = participant?.isScreenSharing ?? wsStatus?.isScreenSharing ?? false;
 
             return (
               <div key={userId} className="flex items-center gap-2 px-2 py-0.5 rounded hover:bg-discord-modifier-hover transition-colors">