Remove website Telegram login countdown

lib/screens/mapflow_shell.dart

@@ -297,8 +297,6 @@ class _TelegramLoginScreen extends StatefulWidget {
 
 class _TelegramLoginScreenState extends State<_TelegramLoginScreen> {
   final _api = MapflowApi();
-  Timer? _countdownTimer;
-  DateTime? _loginExpiresAt;
   var _loading = false;
   var _message = '';
 
@@ -311,12 +309,6 @@ class _TelegramLoginScreenState extends State<_TelegramLoginScreen> {
     }
   }
 
-  @override
-  void dispose() {
-    _countdownTimer?.cancel();
-    super.dispose();
-  }
-
   Future<void> _startLogin() async {
     setState(() {
       _loading = true;
@@ -324,15 +316,8 @@ class _TelegramLoginScreenState extends State<_TelegramLoginScreen> {
     });
     final login = await _api.startTelegramBotLogin();
     telegram_session.openExternalUrl(login.botUrl);
-    _countdownTimer?.cancel();
-    _countdownTimer = Timer.periodic(const Duration(seconds: 1), (_) {
-      if (mounted) {
-        setState(() {});
-      }
-    });
     setState(() {
       _loading = false;
-      _loginExpiresAt = login.expiresAt;
       _message = '';
     });
   }
@@ -343,26 +328,11 @@ class _TelegramLoginScreenState extends State<_TelegramLoginScreen> {
       _message = '';
     });
     final session = await _api.completeTelegramBotLogin(token);
-    _countdownTimer?.cancel();
     telegram_session.saveMapflowSessionToken(session.sessionToken);
     widget.onAuthenticated();
     telegram_session.reloadApp();
   }
 
-  String get _remainingText {
-    final expiresAt = _loginExpiresAt;
-    if (expiresAt == null) {
-      return '';
-    }
-    final seconds = expiresAt.difference(DateTime.now()).inSeconds;
-    if (seconds <= 0) {
-      return '00:00';
-    }
-    final minutes = seconds ~/ 60;
-    final rest = (seconds % 60).toString().padLeft(2, '0');
-    return '$minutes:$rest';
-  }
-
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -382,16 +352,6 @@ class _TelegramLoginScreenState extends State<_TelegramLoginScreen> {
                 ),
                 const SizedBox(height: 24),
                 TelegramLoginButton(onPressed: _startLogin, loading: _loading),
-                if (_remainingText.isNotEmpty) ...[
-                  const SizedBox(height: 12),
-                  Text(
-                    _remainingText,
-                    style: Theme.of(context).textTheme.titleMedium?.copyWith(
-                      fontWeight: FontWeight.w800,
-                      letterSpacing: 0,
-                    ),
-                  ),
-                ],
                 if (_message.isNotEmpty) ...[
                   const SizedBox(height: 14),
                   Text(