added legacy and legacy_dashboard_shell modules

apps/mobile_app/lib/navigation/app_router.dart

@@ -1,4 +1,5 @@
 import 'package:auth/auth.dart';
+import 'package:legacy_dashboard_shell/legacy_dashboard_builder.dart';
 import 'package:dashboard_shell/dashboard_builder.dart';
 import 'package:flutter/material.dart';
 import 'package:get_it/get_it.dart';
@@ -17,7 +18,7 @@ late final GoRouter appRouter;
 void configureAppRouter() {
   appRouter = GoRouter(
     navigatorKey: rootNavigatorKey,
-    initialLocation: AppRoutes.splash,
+    initialLocation: AppRoutes.dashboardHub,
     debugLogDiagnostics: true,
     routes: [
       GoRoute(
@@ -25,11 +26,23 @@ void configureAppRouter() {
         name: 'splash',
         pageBuilder: SplashBuilder().buildPage,
       ),
-      GoRoute(
-        path: AppRoutes.hub,
-        name: 'hub',
-        pageBuilder: HubBuilder().buildPage,
+      StatefulShellRoute.indexedStack(
+        builder: (context, state, navShell) {
+          return LegacyDashboardBuilder().build(context, navShell);
+        },
+        branches: [
+          StatefulShellBranch(
+            routes: [
+              GoRoute(
+                path: AppRoutes.dashboardHub,
+                name: 'hub',
+                pageBuilder: const HubBuilder().buildPage,
+              ),
+            ],
+          ),
+        ],
       ),
+
       GoRoute(
         path: AppRoutes.login,
         name: 'login',