feat(web): Last.fm client lib + top-artists/albums + mb release-group routes

web/src/app/api/mb/release-group/route.ts

@@ -0,0 +1,21 @@
+import { searchReleaseGroup } from "@/lib/musicbrainz";
+
+export async function GET(request: Request) {
+  const url = new URL(request.url);
+  const artist = url.searchParams.get("artist");
+  const album = url.searchParams.get("album");
+  if (!artist || !artist.trim() || !album || !album.trim()) {
+    return Response.json({ error: "artist and album are required" }, { status: 400 });
+  }
+
+  let match;
+  try {
+    match = await searchReleaseGroup(artist.trim(), album.trim());
+  } catch {
+    return Response.json({ error: "MusicBrainz unavailable" }, { status: 502 });
+  }
+  if (!match) {
+    return Response.json({ error: "no match" }, { status: 404 });
+  }
+  return Response.json(match);
+}