Refactor code structure and remove redundant changes

app/loading.tsx

@@ -0,0 +1,10 @@
+export default function Loading() {
+  return (
+    <div className="flex min-h-screen items-center justify-center">
+      <div className="text-center">
+        <div className="h-32 w-32 animate-spin rounded-full border-b-2 border-t-2 border-gray-900"></div>
+        <p className="mt-4 text-lg">Loading...</p>
+      </div>
+    </div>
+  );
+}