Add ACE-Step music generation to the studio and library.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/api/library/tracks/[id].delete.ts

@@ -0,0 +1,8 @@
+export default defineEventHandler(async (event) => {
+  const { owner } = assertLibraryOwner(event)
+  const id = String(getRouterParam(event, 'id') || '')
+  const track = getTrack(owner, id)
+  assertFolderAccess(event, track.folderId)
+  await deleteTrack(owner, id)
+  return { ok: true }
+})