feat: 实现客户端换货系统(client-exchange-system)
新增完整换货生命周期管理:后台发起 → 客户端填收货信息 → 后台发货 → 确认完成(含可选全量迁移) → 旧资产转新再销售 后台接口(7个): - POST /api/admin/exchanges(发起换货) - GET /api/admin/exchanges(换货列表) - GET /api/admin/exchanges/:id(换货详情) - POST /api/admin/exchanges/:id/ship(发货) - POST /api/admin/exchanges/:id/complete(确认完成+可选迁移) - POST /api/admin/exchanges/:id/cancel(取消) - POST /api/admin/exchanges/:id/renew(旧资产转新) 客户端接口(2个): - GET /api/c/v1/exchange/pending(查询换货通知) - POST /api/c/v1/exchange/:id/shipping-info(填写收货信息) 核心能力: - ExchangeOrder 模型与状态机(1待填写→2待发货→3已发货→4已完成,1/2可取消→5) - 全量迁移事务(11张表:钱包、套餐、标签、客户绑定等) - 旧资产转新(generation+1、状态重置、新钱包、历史隔离) - 旧 CardReplacementRecord 表改名为 legacy,is_replaced 过滤改为查新表 - 数据库迁移:000085 新建 tb_exchange_order,000086 旧表改名
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openspec/changes/client-exchange-system/specs/device/spec.md
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openspec/changes/client-exchange-system/specs/device/spec.md
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## MODIFIED Requirements
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### Requirement: 设备换货状态语义扩展
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系统 SHALL 将 `asset_status=3` 定义为“已换货”,用于标记已被换出的旧设备资产。
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#### Scenario: 换货完成后旧设备标记
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- **WHEN** H5 确认完成且旧资产为设备
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- **THEN** 系统 MUST 将旧设备 `asset_status` 更新为 `3`
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---
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### Requirement: 设备转新重置规则
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系统 SHALL 在 H7 转新时对设备执行以下重置:
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- `generation = generation + 1`
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- `asset_status = 1`(在库)
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- 清空累计充值与首充触发相关状态
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- 清除个人客户绑定关系
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- 创建新空钱包并与新代际设备关联
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#### Scenario: 转新后设备可重新销售
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- **WHEN** 对已换货设备执行转新
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- **THEN** 系统 MUST 使该设备进入新代际并恢复在库可售
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