fix: emit ParticipantDisconnected before disposing handles

Author: LautaroPetaccio

packages/livekit-rtc/src/room.ts

@@ -382,14 +382,15 @@ export class Room extends (EventEmitter as new () => TypedEmitter<RoomCallbacks>
       if (participant) {
         this.remoteParticipants.delete(participant.identity);
         participant.info.disconnectReason = ev.value.disconnectReason;
+        // Emit before disposing so listeners can still access trackPublications.
+        this.emit(RoomEvent.ParticipantDisconnected, participant);
         // Dispose each track publication's FfiHandle to prevent FD leaks.
         // Without this, rapid participant disconnections accumulate undisposed
         // native handles since nothing else triggers their cleanup.
         for (const [, publication] of participant.trackPublications) {
           publication.ffiHandle.dispose();
         }
         participant.trackPublications.clear();
-        this.emit(RoomEvent.ParticipantDisconnected, participant);
       } else {
         log.warn(`RoomEvent.ParticipantDisconnected: Could not find participant`);
       }