test(shared): buildMainchainSummary + 4 个 workbench route/hook 补 119 个单元测试（Lane D #1764 第十批）

[DeliciousBuding]

Summary

延续 #1765–#1778，落地 Lane D 前端测试补债 (#1764) 第十批：给 1 个纯逻辑模块 + 4 个 workbench hook 补 119 个单元测试。不改任何产品代码。

为什么选它

• mainchain/buildMainchainSummary.ts（176 行）：mainchain 摘要构建纯逻辑，此前零覆盖。
• useWorkbenchAgentsRoute/useWorkbenchDocsRoute：与既有 contacts/projects route 测试同模式，补齐 route 层。
• useWorkbenchPanelLayout/useWorkbenchProfileChrome：面板布局与 profile chrome 交互状态，此前零覆盖。

覆盖范围

• buildMainchainSummary（+53）：9 态空输入、平台 surface（web/desktop/mobile）、supervisor label 回退链、worker 优先级、路由/事件计数矩阵、edgeRunId/runtime 优先级、evidence 覆盖
• agents/docs route（+29）：mockData 默认值、realDataMode guard、空选择 no-op、save/delete 短路、状态快照语义、草稿语义
• panelLayout/profileChrome（+37）：localStorage 恢复（含非法值）、拖拽/键盘 resize 阈值、workspace-pressure 自动折叠、DM 三分支、头像 plan、深链

Test plan

• vitest run 新文件 — 119/119 通过
• tsc --noEmit 全包 0 错误
• CI 前端测试 job 通过

关联

• 里程碑：简化做减法 · Simplify & Slim Down (Do not dispatch agent tasks with the HTTP request context #100)
• Lane D 测试补债：[P1] 前端测试补债：shared/workbench 核心 store/hook/util 单元测试 #1764（第十批）
• real_tested=true：纯逻辑 + renderHook（无 mock 组件库）

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📥 Commits

Reviewing files that changed from the base of the PR and between 36299d7 and 2262de3.

📒 Files selected for processing (5)

• app/shared/src/workbench/mainchain/buildMainchainSummary.test.ts
• app/shared/src/workbench/useWorkbenchAgentsRoute.test.ts
• app/shared/src/workbench/useWorkbenchDocsRoute.test.ts
• app/shared/src/workbench/useWorkbenchPanelLayout.test.ts
• app/shared/src/workbench/useWorkbenchProfileChrome.test.ts

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