feat: add policy pages

app/(app)/u/[handle]/page.tsx

@@ -0,0 +1,28 @@
+/**
+ * /u/[handle] — public profile, Posts tab (default).
+ *
+ * Server shell that exists for two reasons:
+ *
+ *   1. Export `generateMetadata` so direct shares of this URL
+ *      (https://prabhupadasays.org/u/<handle>) get a rich OG card
+ *      pointing at /api/og/profile/<handle>. The layout and the body
+ *      below are client components; only this file is server.
+ *   2. Mount the client tree (<PostsGrid />), which reads the
+ *      ProfileContext provided by the parent layout for the post-grid
+ *      hrefs and renders the feed.
+ */
+
+import type { Metadata } from "next";
+import { PostsGrid } from "./posts-grid";
+import { metadataForHandle } from "./profile-og";
+
+type Props = { params: Promise<{ handle: string }> };
+
+export async function generateMetadata({ params }: Props): Promise<Metadata> {
+  const { handle } = await params;
+  return metadataForHandle(handle);
+}
+
+export default function PublicProfilePage({ params }: Props) {
+  return <PostsGrid params={params} />;
+}