Saving and sorting - Book update

lib/main.dart

@@ -2,28 +2,35 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart'; // Import for SystemChrome
 import 'screens/home_screen.dart';
 
-void main() {
+void main() async {
   WidgetsFlutterBinding.ensureInitialized();
-  
+
+  // Lock orientation to portrait only
+  await SystemChrome.setPreferredOrientations([
+    DeviceOrientation.portraitUp,
+    DeviceOrientation.portraitDown,
+  ]);
+
   // Set system UI overlay style globally for the app
   SystemChrome.setSystemUIOverlayStyle(
     SystemUiOverlayStyle(
-      statusBarColor: Colors.grey[900], // Set status bar color (top bar)
-      systemNavigationBarColor: Colors.grey[900], // Set navigation bar color
-      systemNavigationBarIconBrightness: Brightness.light, // Set navigation icon color to light
+      statusBarColor: Colors.grey[900],
+      systemNavigationBarColor: Colors.grey[900],
+      systemNavigationBarIconBrightness: Brightness.light,
     ),
   );
 
   runApp(const MyApp());
 }
 
+
 class MyApp extends StatelessWidget {
   const MyApp({super.key});
 
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: 'App with Calendar',
+      title: 'SDK Muta',
       debugShowCheckedModeBanner: false,
       theme: ThemeData(
         colorScheme: ColorScheme.fromSeed(seedColor: Colors.white),