sequenceDiagram participant actor_m-front-book as 预约下单 participant actor_m-admin-pending as 待确认 participant actor_m-admin-board as 预约看板 participant actor_m-admin-customer as 客户档案 participant actor_m-admin-pref as 老客户偏好 actor_m-front-book->>+actor_m-admin-pending: 提交订单 actor_m-admin-pending->>+actor_m-admin-board: 汇总待办 actor_m-admin-pending->>+actor_m-front-book: 返回确认 actor_m-admin-board->>+actor_m-admin-customer: 读档案 actor_m-admin-customer->>+actor_m-admin-pref: 偏好聚合 actor_m-admin-board->>+actor_m-admin-customer: 帮他约 actor_m-admin-customer->>+actor_m-admin-board: 返回档案