fix login

lib/screens/login_screen.dart

@@ -11,7 +11,11 @@ import '../widgets/app_text_field.dart';
 import '../widgets/responsive_body.dart';
 
 class LoginScreen extends StatefulWidget {
-  const LoginScreen({super.key});
+  const LoginScreen({super.key, this.asRoot = false});
+
+  /// When true (cold start / auth gate), stay put on success so [AuthGate]
+  /// rebuilds into the shell. When false, pop with `true` for modal sign-in.
+  final bool asRoot;
 
   @override
   State<LoginScreen> createState() => _LoginScreenState();
@@ -43,7 +47,9 @@ class _LoginScreenState extends State<LoginScreen> {
         password: _passwordController.text,
       );
       if (!mounted) return;
-      Navigator.of(context).pop(true);
+      if (!widget.asRoot) {
+        Navigator.of(context).pop(true);
+      }
     } on ClientException catch (error) {
       if (!mounted) return;
       final message = error.response['message'] as String? ??
@@ -66,19 +72,25 @@ class _LoginScreenState extends State<LoginScreen> {
     final theme = Theme.of(context);
 
     return Scaffold(
-      appBar: AppBar(title: const Text('Sign in')),
+      appBar: AppBar(
+        title: const Text('Sign in'),
+        automaticallyImplyLeading: !widget.asRoot,
+      ),
       body: ResponsiveBody(
         child: ListView(
           padding: const EdgeInsets.fromLTRB(16, 24, 16, 32),
           children: [
             Text(
-              'Sync account',
+              widget.asRoot ? 'Welcome to $kAppName' : 'Sync account',
               style: theme.textTheme.headlineSmall,
             ),
             const SizedBox(height: 8),
             Text(
-              'Sign in to link this device with PocketBase. Labels, notes, '
-              'and bank transactions sync across your devices.',
+              widget.asRoot
+                  ? 'Sign in to sync labels, notes, and transactions across '
+                      'your devices. You can connect your bank afterward.'
+                  : 'Sign in to link this device with PocketBase. Labels, notes, '
+                      'and bank transactions sync across your devices.',
               style: theme.textTheme.bodyMedium?.copyWith(
                 color: theme.colorScheme.onSurfaceVariant,
               ),