test(web): 补 hooks 与 query 错误分支直测

[DeliciousBuding]

Summary

• 为 web 现存 hooks（useAuth / useWebAuth）补 vitest 直测：auto-login 成功/失败/卸载竞态、ensureAuth fail-closed（无 token / 仅 store authenticated）、token 读取。
• 为已删除的 useWorkbenchProjection / useHubIMSnapshot 补 successor 直测：空数据、signed-out、real-mode 空壳、断连后丢弃 stale contacts、reconnect last-read seq。
• query 层补 401/404/500 与无 token fail-closed：contactQueries 新测；agentQueries / projectQueries / executionTargetQueries 追加错误分支。
• transport 已由 refactor(front): transport 下沉 shared 单一实现 #1416 下沉 shared，本 PR 不重做；web 无 agentTeamQueries / edgeClient（desktop-only / 已删）。

覆盖

目标	状态
useAuth	直测
useWebAuth	直测（401 门控 / 断网 auto-login / 重连就绪）
useWorkbenchProjection	successor helpers 直测
useHubIMSnapshot	successor helpers 直测
contactQueries	401/404/500 + 无 token
agent/project/executionTarget queries	401/404/500

验证

• vitest 定向 8 files / 52 tests PASS
• git diff --check PASS
• typecheck：仓库既有 shared/react 解析噪声；本 PR 仅测试文件，无生产代码改动

风险

• 低：仅加测试，不改生产路径
• hooks 目录现仅剩 2 个文件；原 issue 的 8 hooks 中其余已在清理中删除，用 projection/IM successor 覆盖行为合同
• 未覆盖 desktop-only agentTeamQueries

Refs #1395

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📥 Commits

Reviewing files that changed from the base of the PR and between 159e621 and 4b5a135.

📒 Files selected for processing (8)

• app/web/src/api/agentQueries.test.ts
• app/web/src/api/contactQueries.test.ts
• app/web/src/api/executionTargetQueries.test.ts
• app/web/src/api/projectQueries.test.ts
• app/web/src/hooks/useAuth.test.ts
• app/web/src/hooks/useHubIMSnapshot.test.ts
• app/web/src/hooks/useWebAuth.test.tsx
• app/web/src/hooks/useWorkbenchProjection.test.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch test/web-hooks-coverage

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