Complete refactor to clean up project

lib/app.dart

@@ -0,0 +1,23 @@
+import 'package:flutter/material.dart';
+
+import 'features/auth/login_page.dart';
+
+/// Global route observer for tracking navigation events.
+///
+/// Used by pages that need to respond to navigation changes
+final RouteObserver<ModalRoute> routeObserver = RouteObserver<ModalRoute>();
+
+/// The main Sheetless application widget.
+class SheetlessApp extends StatelessWidget {
+  const SheetlessApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Sheetless',
+      theme: ThemeData(useMaterial3: true, colorSchemeSeed: Colors.blue),
+      home: const LoginPage(),
+      navigatorObservers: [routeObserver],
+    );
+  }
+}