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/direct-model-agent/user-stories.md

@@ -88,6 +88,7 @@ Given 直连模型在 TLS 建连、网络传输或单次请求超时时失败且
 
 Given 用户在 Ask 或 Execute 中处理本机项目，When 模型需要定位代码或读取大文件，Then
 它可以使用随包 ripgrep 搜索内容或列出文件，并按行分页读取命中位置，不要求用户预装 `rg`。
+Given Ask 未启用知识库、联网搜索或编程委派，Then 工作区搜索和读取仍可使用，不要求额外批准。
 
 ### US-B1 修改后运行验证
 
@@ -126,6 +127,8 @@ Given 用户选择 Ask，Then 补丁工具不出现在清单中且伪造调用
 
 Given 父直连模型正在处理复杂请求，When 它调用 `subagent_delegate` 并给出独立任务，
 Then 子级使用同一项目、模型连接和 Execute 能力完成工作，And 最终结果返回父模型综合。
+Given 父请求已有浏览器标签页，When 委派任务需要浏览器，Then 子级使用同一页；子级完成后，
+父模型仍可继续操作该页，不因子会话清理而关闭父页。
 
 ### US-C2 Ask 中只读委派