{"name":"Echo Backend API","version":"1.0.0","status":"running","endpoints":{"auth":{"login":"POST /api/auth/login - 发送验证码","verify":"PUT /api/auth/login - 验证登录","me":"GET /api/auth/me - 获取当前用户"},"topics":{"list":"GET /api/topics - 获取话题列表","create":"POST /api/topics - 创建话题"}}}