fix: crash lors deconnexion LiveKit (destructuring undefined)

- LiveKitClient.emit('disconnected') envoie maintenant {reason}
- AudioBridge gere disconnected avec data optionnel (data?.reason)
- Corrige TypeError Cannot destructure property 'reason' of undefined
- Permet reload AudioBridge sans crash serveur

server/bridge/AudioBridge.js

@@ -311,7 +311,8 @@ export class AudioBridge extends EventEmitter {
       console.log('✓ LiveKit connecté');
     });
 
-    this.liveKitClient.on('disconnected', ({ reason }) => {
+    this.liveKitClient.on('disconnected', (data) => {
+      const reason = data?.reason || 'unknown';
       console.warn('⚠️  LiveKit déconnecté:', reason);
       this.stats.errors.network++;
     });

server/bridge/LiveKitClient.js

@@ -143,10 +143,10 @@ export class LiveKitClient extends EventEmitter {
     });
 
     // Déconnexion
-    this.room.on(RoomEvent.Disconnected, () => {
-      console.log('⚠ Room déconnectée');
+    this.room.on(RoomEvent.Disconnected, (reason) => {
+      console.log('⚠ Room déconnectée:', reason);
       this.isConnected = false;
-      this.emit('disconnected');
+      this.emit('disconnected', { reason: reason || 'unknown' });
     });
 
     // Participants
@@ -331,7 +331,7 @@ export class LiveKitClient extends EventEmitter {
       this.isConnected = false;
       this.remoteParticipants.clear();
       console.log('✓ Déconnecté de LiveKit');
-      this.emit('disconnected');
+      this.emit('disconnected', { reason: 'manual' });
     }
   }