fix route error

frontend/src/app/app.routes.ts

@@ -16,6 +16,13 @@ export const routes: Routes = [
     title: 'Register - Quiz Platform'
   },
 
+  // Guest routes
+  {
+    path: 'guest-welcome',
+    loadComponent: () => import('./shared/components/guest-welcome/guest-welcome').then(m => m.GuestWelcomeComponent),
+    title: 'Welcome - Quiz Platform'
+  },
+
   // TODO: Add more routes as components are created
   // - Home page (public)
   // - Dashboard (protected with authGuard)

frontend/src/app/features/auth/login/login.ts

@@ -142,7 +142,7 @@ export class LoginComponent {
     this.guestService.startSession().subscribe({
       next: () => {
         this.isStartingGuestSession.set(false);
-        this.router.navigate(['/categories']);
+        this.router.navigate(['/guest-welcome']);
       },
       error: () => {
         this.isStartingGuestSession.set(false);