first implementation finished

app/lib/main.dart

@@ -1,20 +1,91 @@
 import 'package:flutter/material.dart';
+import 'package:home_widget/home_widget.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:kagi_bang_bang/core/logger.dart';
+import 'package:kagi_bang_bang/core/providers.dart';
+import 'package:kagi_bang_bang/features/search_browser/domain/services/session.dart';
+import 'package:kagi_bang_bang/features/settings/data/repositories/settings_repository.dart';
+import 'package:kagi_bang_bang/presentation/hooks/on_initialization.dart';
 
-void main() {
-  runApp(const MainApp());
+class _ErrorObserver extends ProviderObserver {
+  const _ErrorObserver();
+
+  @override
+  void providerDidFail(
+    ProviderBase<Object?> provider,
+    Object error,
+    StackTrace stackTrace,
+    ProviderContainer container,
+  ) {
+    logger.e('Provider $provider threw $error at $stackTrace');
+  }
 }
 
-class MainApp extends StatelessWidget {
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+
+  await HomeWidget.setAppGroupId('BANG_BANG');
+
+  // if (!kIsWeb && defaultTargetPlatform == TargetPlatform.android) {
+  //   await InAppWebViewController.setWebContentsDebuggingEnabled(kDebugMode);
+  // }
+
+  runApp(
+    ProviderScope(
+      observers: const [_ErrorObserver()],
+      child: HookConsumer(
+        builder: (context, ref, child) {
+          useOnInitialization(
+            () async {
+              final settings =
+                  await ref.read(settingsRepositoryProvider.future);
+
+              if (settings.incognitoMode) {
+                await ref.read(sessionServiceProvider.notifier).clearAllData();
+              }
+
+              if (settings.kagiSession case final String session) {
+                await ref
+                    .read(sessionServiceProvider.notifier)
+                    .setKagiSession(session);
+              }
+
+              ref.read(sessionServiceProvider.notifier).initializationDone();
+            },
+          );
+
+          return const MainApp();
+        },
+      ),
+    ),
+  );
+}
+
+class MainApp extends HookConsumerWidget {
   const MainApp({super.key});
 
   @override
-  Widget build(BuildContext context) {
-    return const MaterialApp(
-      home: Scaffold(
-        body: Center(
-          child: Text('Hello World!'),
-        ),
+  Widget build(BuildContext context, WidgetRef ref) {
+    final isInitialized = ref.watch(sessionServiceProvider);
+    final router = ref.watch(routerProvider);
+
+    if (!isInitialized) {
+      return const Center(
+        child: CircularProgressIndicator(),
+      );
+    }
+
+    return MaterialApp.router(
+      debugShowCheckedModeBanner: false,
+      theme: ThemeData(
+        useMaterial3: true,
+        brightness: Brightness.dark,
+        // colorScheme: ColorScheme.fromSeed(
+        //   seedColor: const Color(0xFFFFB319),
+        //   brightness: Brightness.dark,
+        // ),
       ),
+      routerConfig: router,
     );
   }
 }