Big commit

src/app/features/shell/title-bar.component.ts

@@ -77,6 +77,9 @@ export class TitleBarComponent {
 
   logout() {
     this._showMenu.set(false);
+    // Disconnect from signaling server – this broadcasts "user_left" to all
+    // servers the user was a member of, so other users see them go offline.
+    this.webrtc.disconnect();
     try {
       localStorage.removeItem('metoyou_currentUserId');
     } catch {}