新增 mysql.md(t_ 表名与 migrate 流程),补全 /v1/music·square 与 admin 路由说明;description 与 AGENTS/rules 对齐 make test→lint 与 deploy 门禁,减少与 verify-before-done 重复。 Co-authored-by: Cursor <cursoragent@cursor.com>
Add HTTP /v1 MVC, TCP send path, groups with server-side member-avatar collage, object-storage upload, and friends/favorites around the architecture-v3 layout. Co-authored-by: Cursor <cursoragent@cursor.com>