fix: complete runtime and workspace workflows

Restore Ask workspace reads and output paging without granting write access,
and let programming Subagents reuse their parent's browser page. Allocate
browser resources only when used, keep Agent pages aligned with workbar tabs,
recover released bindings, and remove unused automatic screenshot work.

Preserve inherited Runtime selections during remote usage persistence and
manual compression. Keep viable channel model fallbacks, display the actual
scheduled-task mode and Harness model source, and avoid rediscovery delays
when calling healthy MCP tools. Fix directory/history refresh, case-only
renames, rename-aware commit diffs, and FastGPT probe success reporting.

Add regression coverage and align feature documentation. The Agent-side
connection timeout fix requires deploying an updated Agent; existing Ask
read-only and Execute authorization boundaries remain unchanged.

Final validation: 3839 tests passed, 66 skipped; typecheck, lint, development
build, and diff checks passed. Isolated Electron UI/MCP workflows passed with
a loopback model fixture. Current-source Linux x64 Host checks passed with
three successful real model requests. Chromium loadURL rejection was not
reproduced in the UI; released-binding recovery has automated coverage.

Release note: 修复 Ask 读取项目文件、浏览器页面显示与恢复、文件管理及模型配置跟随中的不一致，并减少无用截图和 MCP 等待。定时任务显示实际工作模式，远程会话可正常保存继承 Runtime 的用量；远端连接超时修复需更新 Agent 后生效。

docs/features/knowledge-base/external-knowledge-technical-design.md

@@ -621,6 +621,15 @@ node scripts/external-knowledge-probe.mjs --extended --output=<report.json>
 Rerank、RAGFlow GraphRAG 和 Knowledge Compilation 检索。脚本只有固定 GET/POST 读取与
 检索端点，不实现或调用远端创建、更新、上传和删除。
 
+FastGPT 报告将请求成功与命中数量分开：HTTP 必须成功、业务 `code` 必须为 `200`，
+且 `data` 或 `data.list` 必须是数组，才记录 `success: true` 和 `count`。成功的空数组
+记录 `count: 0`；HTTP、业务、响应结构、JSON 解析或网络失败记录 `success: false` 与
+固定失败类别，不用零命中代替失败。目录失败时不继续调用详情和检索。
+`features.searchModes` 只包含基础检索实际成功的模式；`rerankProbed` 表示实际尝试，
+`rerankSucceeded` 单独表示成功。历史基线保留原始证据，不追填未观测的成功字段。
+`tests/external-knowledge-probe-fastgpt.test.ts` 使用内存 fetch fixture 运行真实 CLI，
+覆盖错误、成功零命中和非空结果，不连接外部知识服务。
+
 ### 14.7 CRUD 验收边界
 
 | 对象 | Create | Read | Update | Delete | 验收方式 |