Refactor code structure for improved readability and maintainability

apps/landing/src/app.tsx

@@ -1,5 +1,6 @@
 import { ThemeProvider } from '@repo/ui/provider';
 import { Button } from '@repo/ui/components';
+import LandingSample from './features/public-content/presentation/LandingSample';
 
 export default function App() {
   return (
@@ -31,7 +32,11 @@ export default function App() {
             ✅ @repo/ui workspace link verified — Button component rendered successfully.
           </p>
         </div>
+      <div className="p-8">
+      <h1 className="text-2xl font-bold mb-4">Enterprise Web App</h1>
+      <LandingSample />
       </div>
+    </div>
     </ThemeProvider>
   );
 }