feat: add url shortner

app/share/[code]/redirect-client.tsx

@@ -0,0 +1,16 @@
+"use client";
+
+import { useEffect } from "react";
+import { useRouter } from "next/navigation";
+
+// Client-side redirect: we deliberately don't use `redirect()` from
+// next/navigation on the server, because that returns a 307 before the OG
+// `<head>` is ever served. With `generateMetadata` + a 200 body, social-link
+// scrapers get the full OG card while real users still get redirected.
+export function RedirectClient({ to }: { to: string }) {
+  const router = useRouter();
+  useEffect(() => {
+    router.replace(to);
+  }, [router, to]);
+  return null;
+}