fixed warnings

lib/views/login/pages/login_desktop_page.dart

@@ -9,9 +9,38 @@ import '../../../core/utils/size_config.dart';
 import '../../../view_models/auth_view_model.dart';
 import '../widgets/widgets.dart';
 
-class LoginDesktopPage extends StatelessWidget {
+class LoginDesktopPage extends StatefulWidget {
   const LoginDesktopPage({super.key});
 
+  @override
+  State<LoginDesktopPage> createState() => _LoginDesktopPageState();
+}
+
+class _LoginDesktopPageState extends State<LoginDesktopPage> {
+  late final AuthViewModel viewModel;
+
+  @override
+  void initState() {
+    super.initState();
+    viewModel = context.read<AuthViewModel>();
+    viewModel.addListener(_viewModelListener);
+  }
+
+  void _viewModelListener() {
+    if (viewModel.loggedInUser != null) {
+      HomeRouteData().go(context);
+    } else if (viewModel.errorMessage != null) {
+      ScaffoldMessenger.of(context)
+          .showSnackBar(SnackBar(content: Text(viewModel.errorMessage!)));
+    }
+  }
+
+  @override
+  void dispose() {
+    viewModel.removeListener(_viewModelListener);
+    super.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     SizeConfig.init(context);
@@ -55,7 +84,6 @@ class LoginDesktopPage extends StatelessWidget {
                         borderRedus: 12,
                       ),
                       SizedBox(height: 32.0.h()),
-
                       if (viewModel.isLoading)
                         BaseButton(
                           isEnabled: false,
@@ -65,25 +93,11 @@ class LoginDesktopPage extends StatelessWidget {
                       else
                         BaseButton(
                           isEnabled: viewModel.isLoginEnabled,
-                          onPressed:
-                              viewModel.isLoginEnabled
-                                  ? () async {
-                                    await viewModel.login();
-                                    if (viewModel.loggedInUser != null) {
-                                      HomeRouteData().go(context);
-                                    } else if (viewModel.errorMessage != null) {
-                                      ScaffoldMessenger.of(
-                                        context,
-                                      ).showSnackBar(
-                                        SnackBar(
-                                          content: Text(
-                                            viewModel.errorMessage!,
-                                          ),
-                                        ),
-                                      );
-                                    }
-                                  }
-                                  : null,
+                          onPressed: () async {
+                            if (viewModel.isLoginEnabled) {
+                              await viewModel.login();
+                            }
+                          },
                         ),
                     ],
                   );