feat: Refactor code structure and optimize performance across multiple modules

mobile-apps/staff-app/lib/features/sign_up/signup_flow_screen.dart

@@ -0,0 +1,12 @@
+import 'package:auto_route/auto_route.dart';
+import 'package:flutter/material.dart';
+
+@RoutePage()
+class SignupFlowScreen extends StatelessWidget {
+  const SignupFlowScreen({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return const AutoRouter();
+  }
+}