chore(wip): upgrade dependencies, begin refactor

frontend/lib/main.dart

@@ -1,26 +1,39 @@
+import 'package:anyway/presentation/pages/start.dart';
 import 'package:flutter/material.dart';
-
-import 'package:anyway/constants.dart';
-import 'package:anyway/utils/get_first_page.dart';
-import 'package:anyway/utils/load_trips.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:anyway/core/constants.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 
 
-void main() => runApp(const App());
+/// The app entry point.
+/// Initializes persistence, sets up dependency injection via ProviderScope,
+/// and determines which screen (login or main app) to show based on auth state.
+Future<void> main() async {
+  WidgetsFlutterBinding.ensureInitialized();
 
-// Some global variables
-final GlobalKey<ScaffoldMessengerState> rootScaffoldMessengerKey = GlobalKey<ScaffoldMessengerState>();
-final SavedTrips savedTrips = SavedTrips();
-// the list of saved trips is then populated implicitly by getFirstPage()
+  // initialize local persistence (shared preferences)
+  SharedPreferences prefs = await SharedPreferences.getInstance();
 
+  //  the app wrapped in ProviderScope
+  runApp(const ProviderScope(child: MyApp()));
+}
+
+class MyApp extends ConsumerWidget {
+  const MyApp({super.key});
 
-class App extends StatelessWidget {
-  const App({super.key});
 
   @override
-  Widget build(BuildContext context) => MaterialApp(
-    title: APP_NAME,
-    home: getFirstPage(),
-    theme: APP_THEME,
-    scaffoldMessengerKey: rootScaffoldMessengerKey
-  );
+  Widget build(BuildContext context, WidgetRef ref) {
+
+    return MaterialApp(
+      debugShowCheckedModeBanner: false,
+      title: APP_NAME,
+      theme: APP_THEME,
+      scaffoldMessengerKey: rootScaffoldMessengerKey,
+      home: const StartPage()
+
+      // TODO - set up routing
+      // onGenerateRoute: AppRouter.onGenerateRoute,
+    );
+  }
 }