- saved_lyrics 테이블 (id, title, text, prompt, created_at, updated_at) - GET /api/music/lyrics/library — 저장된 가사 목록 조회 - POST /api/music/lyrics/library — 가사 저장 - PUT /api/music/lyrics/library/:id — 가사 수정 - DELETE /api/music/lyrics/library/:id — 가사 삭제 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>