# 文档索引

这份索引只做导航，不重复正文。

## 总览

- [工作区 README](../README.md)
- [文档中心](./README.md)
- [项目总览](./overview.md)
- [架构与请求流](./architecture.md)
- [稳定口径](./standards.md)

## 分领域文档

- [后端总说明](./backend/README.md)
- [后端路由](./backend/routing.md)
- [后端服务层](./backend/services.md)
- [后端命令](./backend/commands.md)
- [文件资产](./backend/files.md)
- [支付插件模板](./backend/payment-plugin-template.md)
- [支付运行时数据契约](./backend/payment-runtime-contract.md)
- [ePay 兼容层](./backend/compat.md)

- [前端总说明](./frontend/README.md)
- [管理后台前端](./frontend/admin.md)
- [商户后台前端](./frontend/mer.md)
- [收银台前端](./frontend/cashier.md)
- [菜单说明](./frontend/menu.md)

- [接口总说明](./api/README.md)
- [管理后台接口](./api/admin.md)
- [商户后台接口](./api/mer.md)
- [收银台与开放接口](./api/cashier.md)
- [ePay 兼容协议](./api/legacy/epay.md)

- [数据库总说明](./db/README.md)
- [数据表目录](./db/tables.md)
- [当前 DDL](./db/payment-middle-ddl.sql)

- [部署总说明](./deployment/README.md)
- [后端部署](./deployment/backend.md)
- [管理后台部署](./deployment/admin.md)
- [商户后台部署](./deployment/mer.md)
- [收银台部署](./deployment/cashier.md)
- [环境变量](./deployment/env.md)

## 项目 README

- [admin](../admin/README.md)
- [mer](../mer/README.md)
- [cashier](../cashier/README.md)
- [mpay](../mpay/README.md)

## 协作与记录

- [接手指南](./agent-handoff.md)
- [阶段计划](./plan.md)
- [常见问题](./faq.md)
- [变更记录](./changelog.md)

## 归档

- [旧版后端文档目录](../mpay/doc/INDEX.md)