PartsInquiry/doc/database_documentation.md

## partsinquiry 数据库文档

更新日期：2025-09-27（对齐远程线上库结构；提醒：`backend/db/db.sql` 尚未覆盖 VIP 相关表，请勿直接依赖本地脚本）

说明：本文件根据远程库 mysql.tonaspace.com 中 `partsinquiry` 的实际结构生成，字段/索引/外键信息以线上为准。如需执行结构变更，请通过 MysqlMCP，并在成功后更新此文档和 `backend/db/db.sql`。差异概览：
- ✅ 线上已存在 `vip_users`、`vip_price`、`vip_recharges`、`attachments` 表；`backend/db/db.sql` 仍缺少对应建表语句。
- ✅ 线上 `admins` 表存储平台管理员，管理端接口通过 `AdminAuthInterceptor` 校验。
- ❌ `global_skus` 及配件审核体系仅部分表有数据，审批流程仍在试运行阶段。
 - ✅ 新增“模板化配件参数”相关结构：`part_templates`、`part_template_params`；为 `products` 与 `part_submissions` 增加 `template_id` 与 `dedupe_key`，并建立唯一与辅助索引。

### shops
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT | 店铺/租户ID |
| name | VARCHAR(100) | NOT NULL |  | 店铺名称 |
| status | TINYINT UNSIGNED | NOT NULL | 1 | 状态：1启用 0停用 |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| deleted_at | DATETIME | YES |  |  |

字段说明：
- id: 主键，自增
- name: 店铺名称
- status: 店铺状态（1启用/0停用）
- created_at/updated_at: 创建/更新时间
- deleted_at: 逻辑删除时间

### users
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT | 用户ID |
| shop_id | BIGINT UNSIGNED | NOT NULL |  | 所属店铺 |
| phone | VARCHAR(32) | YES |  | 手机号 |
| email | VARCHAR(128) | YES |  | 邮箱 |
| name | VARCHAR(64) | NOT NULL |  | 姓名 |
| role | VARCHAR(32) | NOT NULL | staff | 角色：owner/staff/finance/... |
| password_hash | VARCHAR(255) | YES |  | 密码哈希（若采用短信登录可为空） |
| status | TINYINT UNSIGNED | NOT NULL | 1 | 状态：1启用 0停用 |
| is_owner | TINYINT(1) | NOT NULL | 0 | 是否店主 |
（字段已调整：移除 `is_platform_admin`，平台管理员改为独立表 `admins`）
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| deleted_at | DATETIME | YES |  |  |

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_users_shop` (`shop_id`) - UNIQUE: `uk_users_phone` (`phone`) - UNIQUE: `ux_users_shop_phone` (`shop_id`,`phone`) - UNIQUE: `ux_users_email` (`email`)

字段说明：
- shop_id: 归属店铺
- role: 角色标识字符串
- is_owner: 是否店主标记
- 平台管理员：请参见 `admins` 表
### admins
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT | 管理员ID |
| username | VARCHAR(64) | NOT NULL |  | 登录名/展示名 |
| phone | VARCHAR(32) | YES |  | 手机号 |
| password_hash | VARCHAR(255) | YES |  | 密码哈希 |
| status | TINYINT UNSIGNED | NOT NULL | 1 | 状态：1启用 0停用 |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| deleted_at | DATETIME | YES |  |  |

说明：平台管理员不隶属店铺，不具备店铺资源（店铺/配件）归属，仅用于管理端功能。

**Indexes**: - PRIMARY KEY: `id` - UNIQUE: `ux_admins_username` (`username`) - UNIQUE: `ux_admins_phone` (`phone`)
- 其余同名含义

### user_identities
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT |  |
| shop_id | BIGINT UNSIGNED | NOT NULL |  |  |
| user_id | BIGINT UNSIGNED | NOT NULL |  |  |
| provider | ENUM('wechat_mp','wechat_app') | NOT NULL |  | 身份提供方：小程序/APP |
| openid | VARCHAR(64) | NOT NULL |  |  |
| unionid | VARCHAR(64) | YES |  |  |
| nickname | VARCHAR(64) | YES |  |  |
| avatar_url | VARCHAR(512) | YES |  |  |
| last_login_at | DATETIME | YES |  |  |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |

说明：当前 `user_identities` 仅支持微信身份；短信登录采用 `users.phone` 作为全局唯一身份，不新增 identity 记录。

### sms_codes
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT | |
| phone | VARCHAR(32) | NOT NULL |  | 手机号 |
| scene | VARCHAR(32) | NOT NULL | login | 场景，默认为 login |
| code_hash | CHAR(64) | NOT NULL |  | 验证码哈希（SHA-256）|
| salt | CHAR(32) | NOT NULL |  | 加盐字符串 |
| expire_at | DATETIME | NOT NULL |  | 过期时间 |
| status | TINYINT UNSIGNED | NOT NULL | 0 | 0=active,1=used,2=expired,3=blocked |
| fail_count | TINYINT UNSIGNED | NOT NULL | 0 | 错误次数 |
| ip | VARCHAR(45) | YES |  | 发送IP |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP | |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP | |

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_phone_created_at` (`phone`,`created_at`) - KEY: `idx_phone_scene_status` (`phone`,`scene`,`status`) - KEY: `idx_expire_at` (`expire_at`) - KEY: `idx_ip_created_at` (`ip`,`created_at`)

字段说明：
- provider: wechat_mp（小程序）、wechat_app（APP）
- openid/unionid: 微信身份标识

### vip_users
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT | |
| shop_id | BIGINT UNSIGNED | NOT NULL |  | 店铺 |
| user_id | BIGINT UNSIGNED | NOT NULL |  | 用户 |
| is_vip | TINYINT(1) | NOT NULL | 1 | 是否VIP（1是 0否） |
| status | TINYINT UNSIGNED | NOT NULL | 0 | 启用状态：1启用 0停用（审核通过后启用） |
| expire_at | DATETIME | YES |  | 到期时间 |
| remark | VARCHAR(255) | YES |  | 备注/审核说明 |
| reviewer_id | BIGINT UNSIGNED | YES |  | 审核人 |
| reviewed_at | DATETIME | YES |  | 审核时间 |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP | |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP | |

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_vu_shop_user` (`shop_id`,`user_id`) - KEY: `idx_vu_shop_status` (`shop_id`,`status`)
**Foreign Keys**: - `fk_vu_shop`: `shop_id` → `shops(id)` - `fk_vu_user`: `user_id` → `users(id)` - `fk_vu_reviewer`: `reviewer_id` → `users(id)`

### vip_price
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| price | DECIMAL(10,2) | NOT NULL |  | 全局价格（仅一条记录） |

说明：该表为全局配置表，仅包含一条记录用于表示当前 VIP 单月价格。

### vip_recharges
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT | 充值记录ID |
| shop_id | BIGINT UNSIGNED | NOT NULL |  | 店铺ID |
| user_id | BIGINT UNSIGNED | NOT NULL |  | 用户ID |
| price | DECIMAL(10,2) | NOT NULL |  | 本次充值价格（元） |
| duration_days | INT | NOT NULL |  | 本次续期天数 |
| expire_from | DATETIME | YES |  | 生效前到期时间（可空） |
| expire_to | DATETIME | NOT NULL |  | 生效后到期时间 |
| channel | VARCHAR(32) | NOT NULL | oneclick | 渠道（oneclick/…） |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP | 创建时间 |

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_vr_shop` (`shop_id`) - KEY: `idx_vr_user` (`user_id`)
**Foreign Keys**: - `fk_vr_shop`: `shop_id` → `shops(id)` - `fk_vr_user`: `user_id` → `users(id)`
### normal_admin_audits（普通管理员申请/审批审计日志）
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT | |
| shop_id | BIGINT UNSIGNED | NOT NULL |  | 店铺 |
| user_id | BIGINT UNSIGNED | NOT NULL |  | 用户 |
| action | ENUM('apply','approve','reject','revoke','expire') | NOT NULL |  | 操作类型 |
| remark | VARCHAR(255) | YES |  | 备注 |
| operator_admin_id | BIGINT UNSIGNED | YES |  | 平台管理员ID（apply时可空） |
| previous_role | VARCHAR(32) | YES |  | 变更前角色 |
| new_role | VARCHAR(32) | YES |  | 变更后角色 |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP | 创建时间 |

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_naudit_shop_time` (`shop_id`,`created_at`) - KEY: `idx_naudit_user_time` (`user_id`,`created_at`)
**Foreign Keys**: - `fk_naudit_shop`: `shop_id` → `shops(id)` - `fk_naudit_user`: `user_id` → `users(id)` - `fk_naudit_admin`: `operator_admin_id` → `admins(id)`


### wechat_sessions
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT |  |
| provider | ENUM('wechat_mp','wechat_app') | NOT NULL |  |  |
| openid | VARCHAR(64) | NOT NULL |  |  |
| session_key | VARCHAR(128) | NOT NULL |  |  |
| expires_at | DATETIME | NOT NULL |  |  |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |

字段说明：
- session_key/expires_at: 会话密钥与过期时间

### system_parameters
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT |  |
| shop_id | BIGINT UNSIGNED | NOT NULL |  |  |
| user_id | BIGINT UNSIGNED | NOT NULL |  | 创建/最后修改人 |
| key | VARCHAR(64) | NOT NULL |  | 参数键 |
| value | JSON | NOT NULL |  | 参数值（JSON） |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |

字段说明：
- key/value: 键/值（JSON）

### product_units（含全局字典约定）
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT |  |
| shop_id | BIGINT UNSIGNED | NOT NULL |  |  |
| user_id | BIGINT UNSIGNED | NOT NULL |  |  |
| name | VARCHAR(16) | NOT NULL |  |  |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| deleted_at | DATETIME | YES |  |  |

字段说明（product_units）：
- name: 单位名称，如 件/个/箱

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_units_shop` (`shop_id`) - UNIQUE: `ux_units_shop_name` (`shop_id`,`name`)

全局字典约定（方案A）：
- 以 `shop_id=0` 作为“全局字典库”的承载店铺（不对应真实租户）。
- 单位接口 `/api/product-units` 始终返回 `shop_id=0` 的记录；新建/修改/删除仅写入 `shop_id=0`。
- 兼容历史：不强制迁移既有数据，各店已有单位保留。
**Foreign Keys**: - `fk_units_shop`: `shop_id` → `shops(id)` ON UPDATE NO ACTION ON DELETE NO ACTION - `fk_units_user`: `user_id` → `users(id)` ON UPDATE NO ACTION ON DELETE NO ACTION

### global_skus
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT |  |
| name | VARCHAR(120) | NOT NULL |  | SKU名称 |
| brand | VARCHAR(64) | YES |  |  |
| model | VARCHAR(64) | YES |  |  |
| spec | VARCHAR(128) | YES |  |  |
| barcode | VARCHAR(32) | YES |  |  |
| unit_id | BIGINT UNSIGNED | YES |  |  |
| tags | JSON | YES |  |  |
| status | ENUM('published','offline') | NOT NULL | published |  |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| deleted_at | DATETIME | YES |  |  |

字段说明（global_skus）：
- name/brand/model/spec/barcode: SKU 基本属性
- unit_id: 对应的计量单位
- tags: 结构化标签 JSON
- status: 上架状态（published/offline）

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_global_skus_brand_model` (`brand`,`model`) - UNIQUE: `ux_global_skus_barcode` (`barcode`)
**Foreign Keys**: - `fk_globalsku_unit`: `unit_id` → `product_units(id)` ON UPDATE NO ACTION ON DELETE NO ACTION

### product_categories（含全局字典约定）
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT |  |
| shop_id | BIGINT UNSIGNED | NOT NULL |  |  |
| user_id | BIGINT UNSIGNED | NOT NULL |  |  |
| name | VARCHAR(64) | NOT NULL |  |  |
| parent_id | BIGINT UNSIGNED | YES |  |  |
| sort_order | INT | NOT NULL | 0 |  |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| deleted_at | DATETIME | YES |  |  |

字段说明（product_categories）：
- parent_id: 父分类，可为空
- sort_order: 排序

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_categories_shop` (`shop_id`) - KEY: `idx_categories_parent` (`parent_id`) - UNIQUE: `ux_categories_shop_name` (`shop_id`,`name`)

全局字典约定（方案A）：
- 类别接口 `/api/product-categories` 始终返回 `shop_id=0` 的记录；新建/修改/删除仅写入 `shop_id=0`。
- 历史上各店铺已存在的基础项，后续逐步收敛至 `shop_id=0` 字典；为兼容引用，暂不强制删除。
**Foreign Keys**: - `fk_categories_shop`: `shop_id` → `shops(id)` ON UPDATE NO ACTION ON DELETE NO ACTION - `fk_categories_user`: `user_id` → `users(id)` ON UPDATE NO ACTION ON DELETE NO ACTION - `fk_categories_parent`: `parent_id` → `product_categories(id)` ON UPDATE NO ACTION ON DELETE NO ACTION

### products
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT |  |
| shop_id | BIGINT UNSIGNED | NOT NULL |  |  |
| user_id | BIGINT UNSIGNED | NOT NULL |  |  |
| name | VARCHAR(120) | NOT NULL |  | 供全文检索 |
| category_id | BIGINT UNSIGNED | YES |  |  |
| unit_id | (已移除) |  |  |  |
| template_id | BIGINT UNSIGNED | YES |  | 关联的模板 |
| brand | VARCHAR(64) | YES |  |  |
| model | VARCHAR(64) | YES |  |  |
| spec | VARCHAR(128) | YES |  |  |
| origin | VARCHAR(64) | YES |  |  |
| barcode | VARCHAR(32) | YES |  |  |
| dedupe_key | VARCHAR(512) | YES |  | 去重键（规范化后计算） |
| alias | VARCHAR(120) | YES |  |  |
| is_blacklisted | TINYINT(1) | NOT NULL | 0 | 黑名单标记（管理端可控） |
| description | TEXT | YES |  |  |
| global_sku_id | BIGINT UNSIGNED | YES |  |  |
| safe_min | DECIMAL(18,3) | YES |  |  |
| safe_max | DECIMAL(18,3) | YES |  |  |
| search_text | TEXT | YES |  | 供全文检索的聚合字段（名称/品牌/型号/规格/别名） |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| deleted_at | DATETIME | YES |  |  |

字段说明（products）：
- category_id/unit_id/global_sku_id: 归属分类/单位/全局SKU
- safe_min/safe_max: 安全库存上下限
- search_text: 聚合检索字段（触发器维护）

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_products_shop` (`shop_id`) - KEY: `idx_products_category` (`category_id`) - KEY: `idx_products_template` (`template_id`) - KEY: `idx_products_dedupe` (`dedupe_key`) - KEY: `idx_products_shop_blacklist` (`shop_id`,`is_blacklisted`) - FULLTEXT: `ft_products_search` (`name`,`brand`,`model`,`spec`,`search_text`) - UNIQUE: `ux_products_shop_barcode` (`shop_id`,`barcode`) - UNIQUE: `ux_products_template_name_model` (`template_id`,`name`,`model`)
**Foreign Keys**: - `fk_products_shop`: `shop_id` → `shops(id)` - `fk_products_user`: `user_id` → `users(id)` - `fk_products_category`: `category_id` → `product_categories(id)` - `fk_products_template`: `template_id` → `part_templates(id)` - `fk_products_globalsku`: `global_skus(id)`

### part_submissions（配件提交与审核）
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT | 提交ID |
| shop_id | BIGINT UNSIGNED | NOT NULL |  | 店铺 |
| user_id | BIGINT UNSIGNED | NOT NULL |  | 提交用户 |
| name | VARCHAR(255) | YES |  | 配件名称 |
| external_code | VARCHAR(255) | YES |  | 外部编码 |
| model_unique | VARCHAR(255) | NOT NULL |  | 规范化型号（唯一校验） |
| brand | VARCHAR(64) | YES |  | 品牌 |
| spec | VARCHAR(128) | YES |  | 规格 |
| unit_id | BIGINT UNSIGNED | YES |  | 单位 |
| category_id | BIGINT UNSIGNED | YES |  | 分类 |
| template_id | BIGINT UNSIGNED | YES |  | 模板 |
| attributes | JSON | YES |  | 参数JSON |
| images | JSON | YES |  | 图片URL数组JSON |
| size | VARCHAR(64) | YES |  | 兼容历史字段 |
| aperture | VARCHAR(64) | YES |  | 兼容历史字段 |
| compatible | VARCHAR(255) | YES |  | 兼容机型文本 |
| barcode | VARCHAR(32) | YES |  | 条码 |
| dedupe_key | VARCHAR(512) | YES |  | 去重键 |
| remark | TEXT | YES |  | 备注 |
| status | ENUM('pending','approved','rejected') | NOT NULL |  | 审核状态 |
| reviewer_id | BIGINT UNSIGNED | YES |  | 审核人 |
| product_id | BIGINT UNSIGNED | YES |  | 关联生成的商品ID |
| global_sku_id | BIGINT UNSIGNED | YES |  | 关联全局SKU |
| reviewed_at | DATETIME | YES |  | 审核时间 |
| review_remark | VARCHAR(255) | YES |  | 审核备注 |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| deleted_at | DATETIME | YES |  |  |

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_ps_template` (`template_id`) - KEY: `idx_ps_dedupe` (`dedupe_key`) - UNIQUE: `ux_ps_template_name_model` (`template_id`,`name`,`model_unique`)
**Foreign Keys**: - `fk_ps_template`: `template_id` → `part_templates(id)`

### product_aliases
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT |  |
| shop_id | BIGINT UNSIGNED | NOT NULL |  |  |
| user_id | BIGINT UNSIGNED | NOT NULL |  |  |
| product_id | BIGINT UNSIGNED | NOT NULL |  |  |
| alias | VARCHAR(120) | NOT NULL |  |  |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| deleted_at | DATETIME | YES |  |  |

字段说明（product_aliases）：
- alias: 商品别名（同义词）

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_product_alias_product` (`product_id`) - UNIQUE: `ux_product_alias` (`product_id`,`alias`)
**Foreign Keys**: - `fk_alias_shop`: `shop_id` → `shops(id)` - `fk_alias_user`: `user_id` → `users(id)` - `fk_alias_product`: `product_id` → `products(id)`

### product_images
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT |  |
| shop_id | BIGINT UNSIGNED | NOT NULL |  |  |
| user_id | BIGINT UNSIGNED | NOT NULL |  |  |
| product_id | BIGINT UNSIGNED | NOT NULL |  |  |
| url | VARCHAR(512) | NOT NULL |  |  |
| hash | VARCHAR(64) | YES |  | 内容哈希（去重） |
| sort_order | INT | NOT NULL | 0 |  |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |

字段说明（product_images）：
- url/hash: 图片地址/内容哈希
- sort_order: 展示顺序

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_product_images_product` (`product_id`) - UNIQUE: `ux_product_image_hash` (`product_id`,`hash`)
**Foreign Keys**: - `fk_pimg_shop`: `shop_id` → `shops(id)` - `fk_pimg_user`: `user_id` → `users(id)` - `fk_pimg_product`: `product_id` → `products(id)` ON DELETE CASCADE

### part_templates（配件模板）
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT | 模板ID |
| category_id | BIGINT UNSIGNED | NOT NULL |  | 绑定分类 |
| name | VARCHAR(120) | NOT NULL |  | 配件名 |
| model_rule | VARCHAR(255) | YES |  | 型号规则（说明/正则，可空） |
| status | TINYINT UNSIGNED | NOT NULL | 1 | 1启用 0停用 |
| created_by_admin_id | BIGINT UNSIGNED | YES |  | 创建管理员 |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| deleted_at | DATETIME | YES |  | 软删标记 |

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_pt_category` (`category_id`) - KEY: `idx_pt_status` (`status`) - KEY: `idx_pt_admin` (`created_by_admin_id`) - KEY: `idx_part_templates_deleted_at` (`deleted_at`)
**Foreign Keys**: - `fk_pt_category`: `category_id` → `product_categories(id)` - `fk_pt_admin`: `created_by_admin_id` → `admins(id)`

### part_template_params（模板参数字段）
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT |  |
| template_id | BIGINT UNSIGNED | NOT NULL |  | 所属模板 |
| field_key | VARCHAR(64) | NOT NULL |  | 参数键（字母/下划线） |
| field_label | VARCHAR(120) | NOT NULL |  | 参数名（展示） |
| type | ENUM('string','number','boolean','enum','date') | NOT NULL |  | 参数类型 |
| required | TINYINT(1) | NOT NULL | 0 | 是否必填 |
| unit | VARCHAR(32) | YES |  | 单位（文本） |
| enum_options | JSON | YES |  | 枚举项（type=enum） |
| searchable | TINYINT(1) | NOT NULL | 0 | 参与检索 |
| fuzzy_searchable | TINYINT(1) | NOT NULL | 0 | 可模糊查询（仅数值型） |
| fuzzy_tolerance | DECIMAL(18,6) | YES |  | 容差；NULL 使用平台默认 |
| dedupe_participate | TINYINT(1) | NOT NULL | 0 | 参与去重键 |
| sort_order | INT | NOT NULL | 0 |  |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_ptp_template` (`template_id`) - KEY: `idx_ptp_sort` (`template_id`,`sort_order`) - UNIQUE: `ux_ptp_field_key` (`template_id`,`field_key`)
**Foreign Keys**: - `fk_ptp_template`: `template_id` → `part_templates(id)` ON DELETE CASCADE

### product_prices
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| product_id | BIGINT UNSIGNED | NOT NULL |  |  |
| shop_id | BIGINT UNSIGNED | NOT NULL |  |  |
| user_id | BIGINT UNSIGNED | NOT NULL |  |  |
| purchase_price | DECIMAL(18,2) | NOT NULL | 0.00 |  |
| retail_price | DECIMAL(18,2) | NOT NULL | 0.00 |  |
| wholesale_price | DECIMAL(18,2) | NOT NULL | 0.00 |  |
| big_client_price | DECIMAL(18,2) | NOT NULL | 0.00 |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |

字段说明（product_prices）：
- purchase_price: 当前进价（用于近似毛利）
- retail/wholesale/big_client_price: 售价列

**Indexes**: - PRIMARY KEY: `product_id` - KEY: `idx_prices_shop` (`shop_id`)
**Foreign Keys**: - `fk_prices_product`: `product_id` → `products(id)` ON DELETE CASCADE - `fk_prices_shop`: `shop_id` → `shops(id)` - `fk_prices_user`: `user_id` → `users(id)`

### inventories
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| product_id | BIGINT UNSIGNED | NOT NULL |  |  |
| shop_id | BIGINT UNSIGNED | NOT NULL |  |  |
| user_id | BIGINT UNSIGNED | NOT NULL |  |  |
| quantity | DECIMAL(18,3) | NOT NULL | 0.000 |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |

字段说明（inventories）：
- quantity: 当前库存数量（按商品一行聚合）

**Indexes**: - PRIMARY KEY: `product_id` - KEY: `idx_inventories_shop` (`shop_id`)
**Foreign Keys**: - `fk_inv_product`: `product_id` → `products(id)` ON DELETE CASCADE - `fk_inv_shop`: `shop_id` → `shops(id)` - `fk_inv_user`: `user_id` → `users(id)`

### customers
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT |  |
| shop_id | BIGINT UNSIGNED | NOT NULL |  |  |
| user_id | BIGINT UNSIGNED | NOT NULL |  |  |
| name | VARCHAR(120) | NOT NULL |  |  |
| phone | VARCHAR(32) | YES |  | 座机 |
| address | VARCHAR(255) | YES |  | 送货地址 |
| mobile | VARCHAR(32) | YES |  | 手机 |
| contact_name | VARCHAR(64) | YES |  | 联系人 |
| price_level | ENUM('零售价','批发价','大单报价') | NOT NULL | 零售价 | 默认售价列（中文存储） |
| status | TINYINT UNSIGNED | NOT NULL | 1 |  |
| ar_opening | DECIMAL(18,2) | NOT NULL | 0.00 | 期初应收 |
| remark | VARCHAR(255) | YES |  |  |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| deleted_at | DATETIME | YES |  |  |

字段说明（customers）：
- price_level: 默认售价列（中文存储：零售价/批发价/大单报价）
- ar_opening: 期初应收

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_customers_shop` (`shop_id`) - KEY: `idx_customers_phone` (`phone`) - KEY: `idx_customers_mobile` (`mobile`)
**Foreign Keys**: - `fk_customers_shop`: `shop_id` → `shops(id)` - `fk_customers_user`: `user_id` → `users(id)`

### suppliers
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT |  |
| shop_id | BIGINT UNSIGNED | NOT NULL |  |  |
| user_id | BIGINT UNSIGNED | NOT NULL |  |  |
| name | VARCHAR(120) | NOT NULL |  |  |
| contact_name | VARCHAR(64) | YES |  | 联系人 |
| mobile | VARCHAR(32) | YES |  | 手机 |
| phone | VARCHAR(32) | YES |  | 电话 |
| address | VARCHAR(255) | YES |  | 经营地址 |
| status | TINYINT UNSIGNED | NOT NULL | 1 |  |
| ap_opening | DECIMAL(18,2) | NOT NULL | 0.00 | 期初应付 |
| ap_payable | DECIMAL(18,2) | NOT NULL | 0.00 | 当前应付（实时维护） |
| remark | VARCHAR(255) | YES |  |  |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| deleted_at | DATETIME | YES |  |  |

字段说明（suppliers）：
- ap_opening/ap_payable: 期初应付/当前应付

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_suppliers_shop` (`shop_id`) - KEY: `idx_suppliers_phone` (`phone`) - KEY: `idx_suppliers_mobile` (`mobile`)
**Foreign Keys**: - `fk_suppliers_shop`: `shop_id` → `shops(id)` - `fk_suppliers_user`: `user_id` → `users(id)`

### accounts
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT |  |
| shop_id | BIGINT UNSIGNED | NOT NULL |  |  |
| user_id | BIGINT UNSIGNED | NOT NULL |  |  |
| name | VARCHAR(64) | NOT NULL |  |  |
| type | ENUM('cash','bank','alipay','wechat','other') | NOT NULL | cash |  |
| bank_name | VARCHAR(64) | YES |  | 银行名称（type=bank 可用） |
| bank_account | VARCHAR(64) | YES |  | 银行账号（type=bank 可用） |
| balance | DECIMAL(18,2) | NOT NULL | 0.00 |  |
| status | TINYINT UNSIGNED | NOT NULL | 1 |  |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| deleted_at | DATETIME | YES |  |  |

字段说明（accounts）：
- type: 账户类型（cash/bank/alipay/wechat/other）
- bank_name/bank_account: 银行账户信息（type=bank 时使用）

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_accounts_shop` (`shop_id`) - UNIQUE: `ux_accounts_shop_name` (`shop_id`,`name`)
**Foreign Keys**: - `fk_accounts_shop`: `shop_id` → `shops(id)` - `fk_accounts_user`: `user_id` → `users(id)`

### sales_orders
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT |  |
| shop_id | BIGINT UNSIGNED | NOT NULL |  |  |
| user_id | BIGINT UNSIGNED | NOT NULL |  | 创建人 |
| customer_id | BIGINT UNSIGNED | YES |  |  |
| order_no | VARCHAR(32) | NOT NULL |  |  |
| order_time | DATETIME | NOT NULL |  |  |
| status | ENUM('draft','approved','returned','void') | NOT NULL | draft |  |
| amount | DECIMAL(18,2) | NOT NULL | 0.00 | 应收合计 |
| paid_amount | DECIMAL(18,2) | NOT NULL | 0.00 | 已收合计 |
| remark | VARCHAR(255) | YES |  |  |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| deleted_at | DATETIME | YES |  |  |

字段说明（sales_orders）：
- status: 单据状态（draft/approved/returned/void）
- amount/paid_amount: 应收/已收合计

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_sales_shop_time` (`shop_id`,`order_time`) - KEY: `idx_sales_customer` (`customer_id`) - UNIQUE: `ux_sales_order_no` (`shop_id`,`order_no`)
**Foreign Keys**: - `fk_sales_shop`: `shop_id` → `shops(id)` - `fk_sales_user`: `user_id` → `users(id)` - `fk_sales_customer`: `customer_id` → `customers(id)`

### sales_order_items
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT |  |
| order_id | BIGINT UNSIGNED | NOT NULL |  |  |
| product_id | BIGINT UNSIGNED | NOT NULL |  |  |
| quantity | DECIMAL(18,3) | NOT NULL |  |  |
| unit_price | DECIMAL(18,2) | NOT NULL |  |  |
| discount_rate | DECIMAL(5,2) | NOT NULL | 0.00 | 折扣百分比0-100 |
| cost_price | DECIMAL(18,2) | NOT NULL | 0.00 | 记录生成单据时的成本单价 |
| cost_amount | DECIMAL(18,2) | NOT NULL | 0.00 | 成本金额 = 数量×成本单价 |
| amount | DECIMAL(18,2) | NOT NULL |  |  |

字段说明（sales_order_items）：
- quantity/unit_price/discount_rate/amount: 数量/单价/折扣%/行金额
- cost_price/cost_amount: 记录生成单据时的成本（用于利润分析）

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_soi_order` (`order_id`) - KEY: `idx_soi_product` (`product_id`)
**Foreign Keys**: - `fk_soi_order`: `order_id` → `sales_orders(id)` ON DELETE CASCADE - `fk_soi_product`: `product_id` → `products(id)`

### purchase_orders
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT |  |
| shop_id | BIGINT UNSIGNED | NOT NULL |  |  |
| user_id | BIGINT UNSIGNED | NOT NULL |  |  |
| supplier_id | BIGINT UNSIGNED | YES |  |  |
| order_no | VARCHAR(32) | NOT NULL |  |  |
| order_time | DATETIME | NOT NULL |  |  |
| status | ENUM('draft','approved','void','returned') | NOT NULL | draft |  |
| amount | DECIMAL(18,2) | NOT NULL | 0.00 | 应付合计 |
| paid_amount | DECIMAL(18,2) | NOT NULL | 0.00 | 已付合计 |
| remark | VARCHAR(255) | YES |  |  |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| deleted_at | DATETIME | YES |  |  |

字段说明（purchase_orders/purchase_order_items）：
- 与销售单结构类似，含应付与明细

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_purchase_shop_time` (`shop_id`,`order_time`) - KEY: `idx_purchase_supplier` (`supplier_id`) - UNIQUE: `ux_purchase_order_no` (`shop_id`,`order_no`)
**Foreign Keys**: - `fk_purchase_shop`: `shop_id` → `shops(id)` - `fk_purchase_user`: `user_id` → `users(id)` - `fk_purchase_supplier`: `supplier_id` → `suppliers(id)`

### purchase_order_items
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT |  |
| order_id | BIGINT UNSIGNED | NOT NULL |  |  |
| product_id | BIGINT UNSIGNED | NOT NULL |  |  |
| quantity | DECIMAL(18,3) | NOT NULL |  |  |
| unit_price | DECIMAL(18,2) | NOT NULL |  |  |
| amount | DECIMAL(18,2) | NOT NULL |  |  |

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_poi_order` (`order_id`) - KEY: `idx_poi_product` (`product_id`)
**Foreign Keys**: - `fk_poi_order`: `order_id` → `purchase_orders(id)` ON DELETE CASCADE - `fk_poi_product`: `product_id` → `products(id)`

### payments
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT |  |
| shop_id | BIGINT UNSIGNED | NOT NULL |  |  |
| user_id | BIGINT UNSIGNED | NOT NULL |  |  |
| biz_type | ENUM('sale','purchase','other') | NOT NULL |  |  |
| biz_id | BIGINT UNSIGNED | YES |  | 业务表ID：sales_orders/purchase_orders/other_transactions |
| account_id | BIGINT UNSIGNED | NOT NULL |  |  |
| direction | ENUM('in','out') | NOT NULL |  | 收款/付款 |
| amount | DECIMAL(18,2) | NOT NULL |  |  |
| pay_time | DATETIME | NOT NULL |  |  |
| remark | VARCHAR(255) | YES |  |  |
| category | VARCHAR(64) | YES |  | 分类 key（主要用于其他收支） |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |

字段说明（payments）：
- biz_type/biz_id: 业务来源及关联主键
- direction: in 收款 / out 付款
- account_id: 使用的结算账户
- category: 分类 key（主要用于其他收支；用于台账明细展示与统计）

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_payments_shop_time` (`shop_id`,`pay_time`) - KEY: `idx_payments_biz` (`biz_type`,`biz_id`)
**Foreign Keys**: - `fk_payments_shop`: `shop_id` → `shops(id)` - `fk_payments_user`: `user_id` → `users(id)` - `fk_payments_account`: `account_id` → `accounts(id)`

### inventory_movements
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT | |
| shop_id | BIGINT UNSIGNED | NOT NULL |  | |
| user_id | BIGINT UNSIGNED | NOT NULL |  | |
| product_id | BIGINT UNSIGNED | NOT NULL |  | |
| source_type | VARCHAR(32) | NOT NULL |  | 来源：sale/purchase/sale_return/purchase_return/adjust/audit |
| source_id | BIGINT UNSIGNED | YES |  | 来源表ID（可空） |
| qty_delta | DECIMAL(18,3) | NOT NULL |  | 数量增减，出库为负，入库为正 |
| amount_delta | DECIMAL(18,2) | YES |  | 金额增减（可空） |
| cost_price | DECIMAL(18,2) | YES |  | 业务发生时的成本单价（可空） |
| cost_amount | DECIMAL(18,2) | YES |  | 成本金额（可空） |
| reason | VARCHAR(64) | YES |  | 原因/类别 |
| tx_time | DATETIME | NOT NULL |  | 业务时间 |
| remark | VARCHAR(255) | YES |  |  |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_im_shop_time` (`shop_id`,`tx_time`) - KEY: `idx_im_product` (`product_id`)

### sales_return_orders
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT | |
| shop_id | BIGINT UNSIGNED | NOT NULL |  | |
| user_id | BIGINT UNSIGNED | NOT NULL |  | |
| customer_id | BIGINT UNSIGNED | YES |  |  |
| order_no | VARCHAR(32) | NOT NULL |  | |
| order_time | DATETIME | NOT NULL |  | |
| status | ENUM('approved','void') | NOT NULL | approved | |
| amount | DECIMAL(18,2) | NOT NULL | 0.00 | 退货金额合计 |
| paid_amount | DECIMAL(18,2) | NOT NULL | 0.00 | 已退/已收合计 |
| remark | VARCHAR(255) | YES |  | |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP | |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP | |
| deleted_at | DATETIME | YES |  | |

**Indexes**: - PRIMARY KEY: `id` - UNIQUE: `ux_sr_order_no` (`shop_id`,`order_no`) - KEY: `idx_sr_shop_time` (`shop_id`,`order_time`)
**Foreign Keys**: - `fk_sr_customer`: `customer_id` → `customers(id)` - `fk_sr_user`: `user_id` → `users(id)`

### sales_return_order_items
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT | |
| order_id | BIGINT UNSIGNED | NOT NULL |  | |
| product_id | BIGINT UNSIGNED | NOT NULL |  | |
| quantity | DECIMAL(18,3) | NOT NULL |  | |
| unit_price | DECIMAL(18,2) | NOT NULL |  | |
| discount_rate | DECIMAL(5,2) | NOT NULL | 0.00 | 折扣百分比0-100 |
| cost_price | DECIMAL(18,2) | NOT NULL | 0.00 | 退货时对应的成本单价 |
| cost_amount | DECIMAL(18,2) | NOT NULL | 0.00 | 成本金额 = 数量×成本单价 |
| amount | DECIMAL(18,2) | NOT NULL |  | 行金额 |

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_sroi_order` (`order_id`) - KEY: `idx_sroi_product` (`product_id`)
**Foreign Keys**: - `fk_sroi_order`: `order_id` → `sales_return_orders(id)` - `fk_sroi_product`: `product_id` → `products(id)`

### purchase_return_orders
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT | |
| shop_id | BIGINT UNSIGNED | NOT NULL |  | |
| user_id | BIGINT UNSIGNED | NOT NULL |  | |
| supplier_id | BIGINT UNSIGNED | YES |  | |
| order_no | VARCHAR(32) | NOT NULL |  | |
| order_time | DATETIME | NOT NULL |  | |
| status | ENUM('approved','void') | NOT NULL | approved | |
| amount | DECIMAL(18,2) | NOT NULL | 0.00 | 退货金额合计 |
| paid_amount | DECIMAL(18,2) | NOT NULL | 0.00 | 已付合计（退款/扣减） |
| remark | VARCHAR(255) | YES |  | |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP | |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP | |
| deleted_at | DATETIME | YES |  | |

**Indexes**: - PRIMARY KEY: `id` - UNIQUE: `ux_pr_order_no` (`shop_id`,`order_no`) - KEY: `idx_pr_shop_time` (`shop_id`,`order_time`)
**Foreign Keys**: - `fk_pr_supplier`: `supplier_id` → `suppliers(id)` - `fk_pr_user`: `user_id` → `users(id)`

### purchase_return_order_items
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT | |
| order_id | BIGINT UNSIGNED | NOT NULL |  | |
| product_id | BIGINT UNSIGNED | NOT NULL |  | |
| quantity | DECIMAL(18,3) | NOT NULL |  | |
| unit_price | DECIMAL(18,2) | NOT NULL |  | |
| amount | DECIMAL(18,2) | NOT NULL |  | 行金额 |

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_proi_order` (`order_id`) - KEY: `idx_proi_product` (`product_id`)
**Foreign Keys**: - `fk_proi_order`: `order_id` → `purchase_return_orders(id)` - `fk_proi_product`: `product_id` → `products(id)`

### other_transactions
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT |  |
| shop_id | BIGINT UNSIGNED | NOT NULL |  |  |
| user_id | BIGINT UNSIGNED | NOT NULL |  |  |
| type | ENUM('income','expense') | NOT NULL |  |  |
| category | VARCHAR(64) | NOT NULL |  |  |
| counterparty_type | VARCHAR(32) | YES |  | customer/supplier/other |
| counterparty_id | BIGINT UNSIGNED | YES |  |  |
| account_id | BIGINT UNSIGNED | NOT NULL |  |  |
| amount | DECIMAL(18,2) | NOT NULL |  |  |
| tx_time | DATETIME | NOT NULL |  |  |
| remark | VARCHAR(255) | YES |  |  |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP |  |
| deleted_at | DATETIME | YES |  |  |

字段说明（other_transactions）：
- type/category: 收入/支出与分类
- counterparty_type/id: 往来单位（可空）

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_ot_shop_time` (`shop_id`,`tx_time`)

### consults
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT | 咨询ID |
| shop_id | BIGINT UNSIGNED | NOT NULL |  | 所属店铺 |
| user_id | BIGINT UNSIGNED | NOT NULL |  | 提问用户 |
| topic | VARCHAR(120) | NO |  | 主题（可空字符串） |
| message | TEXT | NO |  | 咨询内容 |
| status | ENUM('open','resolved','closed') | NO | open | 状态：未解决/已解决/关闭 |
| created_at | TIMESTAMP | NO | CURRENT_TIMESTAMP | 创建时间 |
| updated_at | TIMESTAMP | NO | CURRENT_TIMESTAMP | 更新时间 |

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_consult_shop_status` (`shop_id`,`status`) - KEY: `fk_consult_user` (`user_id`)
**Foreign Keys**: - `fk_consult_shop`: `shop_id` → `shops(id)` - `fk_consult_user`: `user_id` → `users(id)`

### consult_replies
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT | 回复ID |
| consult_id | BIGINT UNSIGNED | NOT NULL |  | 所属咨询 |
| user_id | BIGINT UNSIGNED | NOT NULL |  | 回复人（管理员） |
| content | TEXT | NOT NULL |  | 回复内容 |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP | 回复时间 |

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_cr_consult` (`consult_id`) - KEY: `fk_cr_user` (`user_id`)
**Foreign Keys**: - `fk_cr_consult`: `consult_id` → `consults(id)` - `fk_cr_user`: `user_id` → `users(id)`

```
**触发器**:
- `trg_consult_replies_ai`: AFTER INSERT ON `consult_replies` → 更新 `consults.status='resolved'` 且 `updated_at=NOW()`
```

### notices
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT | |
| title | VARCHAR(120) | NOT NULL |  | 标题 |
| content | VARCHAR(500) | NOT NULL |  | 内容（跑马灯/简讯） |
| tag | VARCHAR(32) | YES |  | 标签（如“活动”） |
| is_pinned | TINYINT(1) | NOT NULL | 0 | 是否置顶 |
| starts_at | DATETIME | YES |  | 生效开始时间（为空立即生效） |
| ends_at | DATETIME | YES |  | 生效结束时间（为空长期） |
| status | ENUM('draft','published','offline') | NOT NULL | published | 状态 |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP | |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP | |
| deleted_at | DATETIME | YES |  | 逻辑删除 |

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_notices_time` (`starts_at`,`ends_at`)

字段说明：
- 生效窗口：仅当 `status='published'` 且当前时间处于 `[starts_at, ends_at]` 区间（空表示不限制）时，前台 `/api/notices` 会返回；排序 `is_pinned DESC, created_at DESC`。
- 数据范围：平台全局公告（与租户无关）。如需“店铺公告”，需在该表增加 `shop_id` 并调整接口逻辑。

### email_codes
| Column Name | Data Type | Nullable | Default | Comment |
| ----------- | --------- | -------- | ------- | ------- |
| id | BIGINT UNSIGNED | NOT NULL | AUTO_INCREMENT | |
| email | VARCHAR(128) | NOT NULL |  | 邮箱 |
| scene | VARCHAR(32) | NOT NULL |  | 场景（login/register/…） |
| code_hash | VARCHAR(64) | NOT NULL |  | 验证码哈希（SHA-256） |
| salt | VARCHAR(64) | NOT NULL |  | 加盐字符串 |
| expire_at | DATETIME | NOT NULL |  | 过期时间 |
| status | TINYINT UNSIGNED | NOT NULL | 0 | 0=unused,1=used,2=expired |
| fail_count | INT | NOT NULL | 0 | 错误次数 |
| ip | VARCHAR(64) | YES |  | 发送IP |
| created_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP | |
| updated_at | TIMESTAMP | NOT NULL | CURRENT_TIMESTAMP | |

**Indexes**: - PRIMARY KEY: `id` - KEY: `idx_email_scene_created` (`email`,`scene`,`created_at`) - KEY: `idx_email_expire` (`expire_at`)