feat(home): add Ver lista do Martin CTA, mints anonymous visitor guest

app/page.tsx

@@ -83,13 +83,24 @@ export default function HomePage() {
     );
   }
 
+  const onVisit = async () => {
+    await fetch('/api/public/visit', { method: 'POST', credentials: 'include' });
+    router.replace('/');
+  };
+
   return (
     <div className="min-h-screen flex items-center justify-center text-center px-6">
       <div className="max-w-xl">
         <h1 className="text-4xl font-bold mb-3">Lista de Presentes</h1>
-        <p className="text-lg text-gray-500">
+        <p className="text-lg text-gray-500 mb-6">
           Gerencie listas de presentes e convites com facilidade.
         </p>
+        <button
+          onClick={onVisit}
+          className="inline-flex items-center px-5 py-3 rounded-md bg-indigo-600 text-white font-medium hover:bg-indigo-700 transition cursor-pointer"
+        >
+          Ver lista do Martin
+        </button>
       </div>
     </div>
   );