{"name":"R2 MP3 Player API - 纯预签名URL版本","version":"3.0","mode":"direct-r2-cdn-only","endpoints":{"POST /api/login":"用户登录（Cookie模式）","POST /api/login-token":"用户登录（Token模式，推荐）","POST /api/logout":"用户登出","GET /api/verify":"验证登录状态","POST /api/register":"用户注册","GET /api/users":"获取用户列表（管理员）","GET /api/online-stats":"获取在线人数统计","POST /api/hash-password":"密码哈希生成工具（调试用）","GET /api/mp3-list":"获取音乐列表（含预签名URL）","GET /api/recordings":"获取新版资料库录音列表（可按 year 筛选）","GET /api/search-direct":"直接搜索接口","GET /api/transcript-search":"按录音聚合的文字稿搜索","POST /api/presigned-url":"生成预签名URL","POST /api/transcript":"获取结构化文字稿片段","POST /api/transcription":"获取音频转录文本","POST /api/transcription-url":"获取转录文件预签名URL","POST /api/summary-url":"获取AI总结文件预签名URL","POST /api/download-url":"生成下载预签名URL（强制下载）","GET /api/guestbook":"获取留言板列表","POST /api/guestbook":"添加留言到留言板","GET /api/health":"健康检查"}}