feat: Refactor code structure and optimize performance across multiple modules

mobile-apps/staff-app/lib/features/splash/presentation/splash_screen.dart

@@ -0,0 +1,17 @@
+import 'package:auto_route/auto_route.dart';
+import 'package:flutter/material.dart';
+
+@RoutePage()
+class SplashScreen extends StatefulWidget {
+  const SplashScreen({super.key});
+
+  @override
+  State<SplashScreen> createState() => _SplashScreenState();
+}
+
+class _SplashScreenState extends State<SplashScreen> {
+  @override
+  Widget build(BuildContext context) {
+    return Container();
+  }
+}