1. Session persists in GATHERING state. 2. Added inactive sessions purging, but it does not work.

frontend/src/services/websocket.ts

@@ -32,8 +32,8 @@ class WebSocketService {
 
         this.ws.onopen = () => {
             console.log('WebSocket connected');
-            // Directly send registration message on open
-            this.sendMessage({ type: 'REGISTER_CLIENT' });
+            // Send JOIN_SESSION message on open to inform the server of the client and session IDs
+            this.sendMessage({ type: 'JOIN_SESSION', payload: { clientId: this.currentClientId, sessionId: this.currentSessionId } });
 
             // Start heartbeat to keep connection alive
             this.heartbeatInterval = setInterval(() => {