Complete refactor to clean up project

lib/main.dart

@@ -1,49 +1,47 @@
-import 'dart:io';
-
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter_fullscreen/flutter_fullscreen.dart';
 import 'package:hive/hive.dart';
 import 'package:logging/logging.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:pdfrx/pdfrx.dart';
-import 'package:flutter_fullscreen/flutter_fullscreen.dart';
 
-import 'login_page.dart';
+import 'app.dart';
 
-final RouteObserver<ModalRoute> routeObserver = RouteObserver<ModalRoute>();
+/// Application entry point.
+///
+/// Performs platform-specific initialization before running the app
 Future<void> main() async {
-  Logger.root.level = Level.ALL; // defaults to Level.INFO
+  WidgetsFlutterBinding.ensureInitialized();
+
+  await _initializeLogging();
+  await _initializePlugins();
+
+  runApp(const SheetlessApp());
+}
+
+/// Configures the logging system.
+Future<void> _initializeLogging() async {
+  Logger.root.level = Level.ALL;
   Logger.root.onRecord.listen((record) {
     debugPrint('${record.level.name}: ${record.time}: ${record.message}');
     if (record.error != null) {
       debugPrint('${record.error}');
     }
   });
+}
 
-  // setup for flutter_fullscreen
-  WidgetsFlutterBinding.ensureInitialized(); // Needs to be initialized first, otherwise app gets stuck in splash screen
+/// Initializes platform-specific plugins and services.
+Future<void> _initializePlugins() async {
+  // Fullscreen support
   await FullScreen.ensureInitialized();
 
-  pdfrxFlutterInitialize(); // Needed especially for web
+  // PDF rendering (especially needed for web)
+  pdfrxFlutterInitialize();
 
+  // Local storage (not supported on web)
   if (!kIsWeb) {
-    Directory dir = await getApplicationDocumentsDirectory();
-    Hive.init(dir.path); // Needed only if not web
-  }
-
-  runApp(const MyApp());
-}
-
-class MyApp extends StatelessWidget {
-  const MyApp({super.key});
-
-  @override
-  Widget build(BuildContext context) {
-    return MaterialApp(
-      title: 'Sheetless',
-      theme: ThemeData(useMaterial3: true, primarySwatch: Colors.blue),
-      home: const LoginPage(),
-      navigatorObservers: [routeObserver],
-    );
+    final dir = await getApplicationDocumentsDirectory();
+    Hive.init(dir.path);
   }
 }