Refactor code structure and remove redundant changes

app/not-found.tsx

@@ -0,0 +1,18 @@
+import Link from 'next/link';
+
+export default function NotFound() {
+  return (
+    <div className="flex min-h-screen flex-col items-center justify-center p-24">
+      <div className="text-center">
+        <h2 className="text-2xl font-bold mb-4">404 - Page Not Found</h2>
+        <p className="text-gray-600 mb-4">Could not find the requested resource</p>
+        <Link
+          href="/"
+          className="bg-blue-500 hover:bg-blue-700 text-white font-bold py-2 px-4 rounded"
+        >
+          Return Home
+        </Link>
+      </div>
+    </div>
+  );
+}