docs: integrate agent browser background debugging contract

.project-docs/30-worklog/task-history.md

@@ -4,6 +4,7 @@
 
 | Date | Task | Outcome | Docs Updated |
 |---|---|---|---|
+| 2026-09-27 | 合入浏览器切页与后台调试修复 | 快进合入 a52e747；切回对话不阻断工具，重复 open 不抢标签，隐藏截图不抢焦点；3 份外来文档保持 | architecture、domain、current-state、integration task |
 | 2026-09-14 | 合入用户级微信账号管理 | 已审查源快进到本地 main；多账号、可选目标、切换保留登录，原有 3 份文档保留 | 个人云平台 ADR、决策索引、架构、当前状态、本任务 |
 | 2026-09-04 | Land official Project Scaffold Plugin on local main | Fast-forwarded verified integration head `b92e7ba` onto local `main` while preserving three explicitly adopted historical task documents unchanged; no package, publication, deployment, or push was performed | current-state, landing task |
 | 2026-09-04 | Official Marketplace Project Scaffold integration | 将 `makelore.project-scaffold` 作为代码所有、随签名客户端交付的 bundled `skill_only` Plugin 接入 Account Library/项目启用/Agent 分配；官方 `.mjs` 不经过下载 artifact，下载包仍保持文本/图片 P0 限制 | ADR-008、current-state、architecture、domain、success criteria、integration task |