Fix Exit: restart to fresh AuthScreen (re-evaluates registered+session); import AuthScreen

lib/settings_screen.dart

@@ -1,7 +1,7 @@
-import 'dart:io';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:login_vault_app/auth_service.dart';
+import 'package:login_vault_app/auth_screen.dart';
 import 'package:login_vault_app/theme_provider.dart';
 
 /// Settings: change app password, switch theme (dark/system), session timeout,
@@ -214,12 +214,15 @@ class _SettingsScreenState extends State<SettingsScreen> {
             title: const Text('Keluar (Exit)'),
             onTap: () async {
               await widget.auth.closeSession();
-              Navigator.of(context).popUntil((r) => r.isFirst);
-              if (Platform.isAndroid) {
-                SystemNavigator.pop();
-              } else {
-                exit(0);
-              }
+              // restart to a fresh AuthScreen (re-evaluates registered +
+              // session state) instead of just popping back to Dashboard.
+              if (!mounted) return;
+              Navigator.of(context).pushAndRemoveUntil(
+                MaterialPageRoute(
+                  builder: (_) => AuthScreen(auth: widget.auth),
+                ),
+                (r) => false,
+              );
             },
           ),
         ],