docs(product): integrate implemented community and teaching boundaries

.project-docs/20-architecture/module-map.md

@@ -1,5 +1,9 @@
 # Module Map
 
+## Community Collaboration · 2026-10-09
+
+社区协作只调整 src/components/account/PointWallet.tsx、Sidebar.tsx 的当前账号展示与 electron/api/routes/works-billing.ts 的拒绝提示，沿用原账务传输；不新增课程模块。具体设计见[协作边界](community-collaboration.md)。
+
 ## Source Layout
 
 | Path | Responsibility | Owner Notes |