refactor(*): 稳定期治理 - 收敛核心架构、错误语义并修复跨项目数据竞态

docs/index.md

@@ -47,6 +47,7 @@
 - [AI 审美批改画布插件](content/docs/plugins/ai-art-critique.mdx)
 - [功能](content/docs/overview/features.mdx)
 - [本地开发](content/docs/backend/local-development.mdx)
+- [HTTP API 合同](content/docs/backend/http-api.mdx)
 - [后端数据库](content/docs/backend/backend-database.mdx)
 - [代码地图](content/docs/backend/code-map.mdx)
 - [待办](content/docs/progress/todo.mdx)