Add submit button click handler in Book Now page to manage login dialog display

app/(pages)/book-now/page.tsx

@@ -88,6 +88,7 @@ export default function BookNowPage() {
   const [error, setError] = useState<string | null>(null);
   const [showLoginDialog, setShowLoginDialog] = useState(false);
 
+  // Handle submit button click
   const handleSubmit = async (e: React.FormEvent) => {
     e.preventDefault();
     // Open login dialog instead of submitting directly