feat(seo): add sitemap generator

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

@@ -1,18 +1,23 @@
 /**
  * /u/[handle] — public profile, Posts tab (default).
  *
- * Server shell that exists for two reasons:
+ * Server shell that exists for three 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.
+ *   2. Emit server-rendered ProfilePage/Person JSON-LD so crawlers + LLMs
+ *      can resolve the profile (the layout is a client component and
+ *      fetches the profile after hydration, too late for crawlers).
+ *   3. Mount the client tree (<PostsGrid />), which reads the
+ *      ProfileContext provided by the parent layout.
  */
 
 import type { Metadata } from "next";
+import { bff } from "@/lib/bff";
+import { JsonLd } from "@/components/seo/json-ld";
+import { profileJsonLd } from "@/lib/jsonld";
 import { PostsGrid } from "./posts-grid";
 import { metadataForHandle } from "./profile-og";
 
@@ -23,6 +28,32 @@ export async function generateMetadata({ params }: Props): Promise<Metadata> {
   return metadataForHandle(handle);
 }
 
-export default function PublicProfilePage({ params }: Props) {
-  return <PostsGrid params={params} />;
+export default async function PublicProfilePage({ params }: Props) {
+  const { handle } = await params;
+
+  let person: object | null = null;
+  try {
+    const profile = await bff<{
+      handle: string;
+      name: string;
+      avatar_url?: string | null;
+    }>(`/u/${encodeURIComponent(handle)}`, { revalidate: 60 });
+    if (profile) {
+      person = profileJsonLd({
+        path: `/u/${profile.handle}`,
+        name: profile.name,
+        handle: profile.handle,
+        image: profile.avatar_url ?? null,
+      });
+    }
+  } catch {
+    // Profile unavailable — skip JSON-LD rather than fail the page.
+  }
+
+  return (
+    <>
+      {person ? <JsonLd data={person} /> : null}
+      <PostsGrid params={params} />
+    </>
+  );
 }