login loading

lib/features/auth/presentation/pages/login_page.dart

@@ -20,6 +20,7 @@ class _LoginPageState extends State<LoginPage> {
   List<BiometricType>? _availableBiometrics;
   String _authorized = "Not Authorized";
   bool _isAuthenticating = false;
+  bool _isSigningIn = false;
   _SupportState _supportState = _SupportState.unknown;
 
   var _obscurePassword = true;
@@ -43,10 +44,18 @@ class _LoginPageState extends State<LoginPage> {
     super.dispose();
   }
 
-  void _submit() {
+  Future<void> _submit() async {
     final form = _formKey.currentState;
     if (form == null || !form.validate()) return;
 
+    setState(() {
+      _isSigningIn = true;
+    });
+
+    await Future<void>.delayed(const Duration(seconds: 2));
+
+    if (!mounted) return;
+
     Navigator.of(context).pushReplacement(
       MaterialPageRoute(builder: (_) => const MainShell()),
     );
@@ -245,7 +254,7 @@ class _LoginPageState extends State<LoginPage> {
                         SizedBox(
                           width: double.infinity,
                           child: FilledButton(
-                            onPressed: _submit,
+                            onPressed: _isSigningIn ? null : _submit,
                             style: FilledButton.styleFrom(
                               backgroundColor: colorScheme.primary,
                               foregroundColor: Colors.white,
@@ -254,7 +263,18 @@ class _LoginPageState extends State<LoginPage> {
                                 borderRadius: BorderRadius.circular(18),
                               ),
                             ),
-                            child: const Text(
+                            child: _isSigningIn
+                                ? const SizedBox(
+                                    height: 20,
+                                    width: 20,
+                                    child: CircularProgressIndicator(
+                                      strokeWidth: 2.4,
+                                      valueColor: AlwaysStoppedAnimation<Color>(
+                                        Colors.white,
+                                      ),
+                                    ),
+                                  )
+                                : const Text(
                                     'Sign In',
                                     style: TextStyle(
                                       fontSize: 16,