feat: Implement expandable tag sections with "Show More/Less" functionality on the agent home screen.

lib/features/auth/presentation/screens/verify_2fa_screen.dart

@@ -18,6 +18,7 @@ class _Verify2faScreenState extends ConsumerState<Verify2faScreen> {
   final List<FocusNode> _focusNodes = List.generate(6, (_) => FocusNode());
   final TextEditingController _backupController = TextEditingController();
   bool _useBackupCode = false;
+  bool _isSubmitting = false;
 
   @override
   void dispose() {
@@ -69,13 +70,17 @@ class _Verify2faScreenState extends ConsumerState<Verify2faScreen> {
   }
 
   void _submit() {
+    if (_isSubmitting) return;
+
     if (_useBackupCode) {
       final code = _backupController.text.trim();
       if (code.isEmpty) return;
+      _isSubmitting = true;
       ref.read(authProvider.notifier).verifyBackupCode(code);
     } else {
       final code = _otpCode;
       if (code.length != 6) return;
+      _isSubmitting = true;
       ref.read(authProvider.notifier).verifyTwoFactor(code);
     }
   }
@@ -90,11 +95,14 @@ class _Verify2faScreenState extends ConsumerState<Verify2faScreen> {
     final authState = ref.watch(authProvider);
     final isLoading = authState.status == AuthStatus.loading;
 
-    // Navigate to home when authentication succeeds
+    // Navigate to home when authentication succeeds, reset submit lock on error
     ref.listen<AuthState>(authProvider, (previous, next) {
       if (next.status == AuthStatus.authenticated) {
         context.go('/home');
       }
+      if (next.status != AuthStatus.loading) {
+        _isSubmitting = false;
+      }
     });
 
     return Scaffold(