feat: Initialize Flutter app with authentication and scheduling features

- Removed TypeScript configuration file (tsconfig.json).
- Added Flutter plugin dependencies for secure storage.
- Implemented main application structure with routing for login, profile, and schedule screens.
- Developed LoginScreen with authentication logic and user feedback.
- Created ProfileScreen to display user profile information and logout functionality.
- Built ScheduleScreen to show weekly work schedule with navigation controls.
- Integrated AuthService for handling authentication, token storage, and API interactions.
- Updated pubspec.yaml with necessary dependencies for the Flutter project.

lib/screens/profile_screen.dart

@@ -0,0 +1,31 @@
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+
+import '../services/auth_service.dart';
+
+class ProfileScreen extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    final auth = Provider.of<AuthService>(context);
+    final profile = auth.profile;
+    return Scaffold(
+      appBar: AppBar(title: Text('Profil')),
+      body: Center(
+        child: profile == null ? Text('Nincs profil') : Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            Text(profile['FullName'] ?? '', style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold)),
+            SizedBox(height: 8),
+            Text('UserID: ${profile['UserID'] ?? ''}'),
+            SizedBox(height: 16),
+            Row(mainAxisSize: MainAxisSize.min, children: [
+              ElevatedButton(onPressed: () async { await auth.logout(); Navigator.pushReplacementNamed(context, '/'); }, child: Text('Kijelentkezés')),
+              SizedBox(width: 12),
+              ElevatedButton(onPressed: () async { await auth.loadProfile(); }, child: Text('Frissít'))
+            ])
+          ],
+        ),
+      ),
+    );
+  }
+}