feat: Implement optimistic UI for agent availability toggle, add email and phone visibility toggles, and improve the logout process with immediate socket disconnection and best-effort API calls.

lib/features/auth/presentation/providers/auth_provider.dart

@@ -103,12 +103,15 @@ class AuthNotifier extends StateNotifier<AuthState> {
   }
 
   Future<void> logout() async {
-    state = state.copyWith(status: AuthStatus.loading);
-    // Disconnect socket before logout
+    // Disconnect socket immediately
     SocketService().disconnect();
-    // Unregister FCM token before clearing auth
-    await PushNotificationService().unregister();
-    await _repository.logout();
+    // Attempt FCM unregister and API logout (best-effort, don't block)
+    try {
+      await PushNotificationService().unregister();
+    } catch (_) {}
+    try {
+      await _repository.logout();
+    } catch (_) {}
     state = const AuthState();
   }