added login

lib/app/app.dart

@@ -3,7 +3,9 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 
 import '../core/constants/app_constants.dart';
 import '../core/router/app_router.dart';
+import '../core/theme/app_colors.dart';
 import '../core/theme/app_theme.dart';
+import '../presentation/auth/providers/auth_controller.dart';
 import '../presentation/sync/providers/sync_controller.dart';
 
 class NearlePosApp extends ConsumerWidget {
@@ -15,6 +17,18 @@ class NearlePosApp extends ConsumerWidget {
     // behind it. Nothing on screen depends on this having finished.
     ref.watch(syncBootstrapProvider);
 
+    // This one *is* awaited. Re-opening a stored session is a keystore read —
+    // a few milliseconds — and building the router before it lands would show
+    // an already-signed-in terminal the login screen and then snatch it away.
+    final restored = ref.watch(sessionBootstrapProvider);
+
+    if (restored.isLoading) {
+      return const MaterialApp(
+        debugShowCheckedModeBanner: false,
+        home: ColoredBox(color: AppColors.background),
+      );
+    }
+
     return MaterialApp.router(
       title: AppConstants.appName,
       debugShowCheckedModeBanner: false,