use callback instead of global key

lib/main.dart

@@ -3,7 +3,6 @@ import 'package:maid/config/theme.dart';
 import 'package:maid/pages/home_page.dart';
 
 final maidAppKey = GlobalKey<MaidAppState>();
-final homePageKey = GlobalKey<MaidHomePageState>();
 
 void main() {
   runApp(MaidApp(key: maidAppKey));
@@ -38,7 +37,7 @@ class MaidAppState extends State<MaidApp> {
       debugShowCheckedModeBanner: false,
       title: 'Maid',
       theme: MaidTheme.theme,
-      home: MaidHomePage(key: homePageKey, title: 'Maid'),
+      home: const MaidHomePage(title: 'Maid'),
     );
   }
 }