{"name":"混凝土台账小程序 API","version":"1.0.0","endpoints":["POST   /api/login              - 微信登录","GET    /api/projects           - 获取工程列表","POST   /api/projects           - 新建工程","PUT    /api/projects/:id       - 更新工程","DELETE /api/projects/:id       - 删除工程","POST   /api/projects/join      - 通过邀请码加入","POST   /api/projects/:id/invite-code - 生成邀请码","GET    /api/ledger/:type       - 拉取台账数据","POST   /api/ledger/:type/sync  - 批量同步台账数据","DELETE /api/ledger/:type/:id   - 软删除记录","POST   /api/upload             - 上传文件","GET    /api/health             - 健康检查"]}