completed migrating data scope from user to workspace

lib/routes.dart

@@ -29,6 +29,7 @@ import 'package:qpay/screens/profile_screen.dart';
 import 'package:qpay/screens/receipt/receipt_screen.dart';
 import 'package:qpay/screens/recipient/recipients_screen.dart';
 import 'package:qpay/screens/splash_screen.dart';
+import 'package:qpay/screens/workspaces/workspace_screen.dart';
 
 /// Tracks whether the splash animation is complete so that
 /// GoRouter's redirect can show the splash first, then release
@@ -135,9 +136,10 @@ GoRouter buildRouter() {
           return authState.requireAuth(path);
         }
 
-        // Splash → original route or home.
+        // Splash → workspace selector (which may auto-redirect to home
+        // if only one workspace exists).
         if (path == '/splash') {
-          return splashState.intendedRoute ?? '/';
+          return '/workspace';
         }
       }
 
@@ -153,12 +155,13 @@ GoRouter buildRouter() {
       ShellRoute(
         builder: (context, state, child) {
           final location = GoRouterState.of(context).uri.toString();
-          if (location.startsWith('/onboarding/')) {
+          if (location.startsWith('/onboarding/') || location == '/workspace') {
             return child;
           }
           return ScaffoldWithNavBar(child: child);
         },
         routes: [
+          GoRoute(path: '/workspace', builder: (context, state) => const WorkspaceScreen()),
           GoRoute(path: '/', builder: (context, state) => const HomeScreen()),
           GoRoute(
             path: '/home',
@@ -229,8 +232,7 @@ GoRouter buildRouter() {
           ),
           GoRoute(
             path: '/groups/create-from-file',
-            builder: (context, state) =>
-                const CreateGroupFromFileScreen(),
+            builder: (context, state) => const CreateGroupFromFileScreen(),
           ),
           GoRoute(
             path: '/groups/:groupId',