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/messaging/data/socket_service.dart

@@ -18,6 +18,7 @@ class SocketService {
 
   io.Socket? _socket;
   bool _isConnected = false;
+  bool _intentionalDisconnect = false;
   String? _currentToken;
 
   // Stream controllers for events
@@ -52,6 +53,7 @@ class SocketService {
     if (_socket?.connected == true && _currentToken == token) return;
 
     _currentToken = token;
+    _intentionalDisconnect = false;
 
     // Strip /api/v1 from base URL for socket connection
     final apiUrl = AppConfig.apiBaseUrl;
@@ -82,7 +84,7 @@ class SocketService {
       _isConnected = false;
       _connectionController.add(false);
 
-      if (reason == 'io server disconnect') {
+      if (reason == 'io server disconnect' && !_intentionalDisconnect) {
         _log.w('Server rejected connection - token likely expired');
         _reconnectWithFreshToken();
       }
@@ -151,6 +153,7 @@ class SocketService {
   }
 
   void disconnect() {
+    _intentionalDisconnect = true;
     _socket?.disconnect();
     _socket?.dispose();
     _socket = null;