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/logic-design.md

@@ -55,6 +55,9 @@
 工具清单隐藏不是最终授权边界。`callTool` 仍须重新验证 Runtime、工作模式、执行空间和父请求
 是否活动，以拒绝旧快照或伪造调用。
 
+FR-4 / FR-12 / US-B0：Ask 工作区搜索和读取不依赖知识库、联网搜索或委派开关，不需要
+切到 Execute 或额外批准。MCP 服务器失败也不改变本机只读工具的可用性。
+
 `output_read` 在直连模型拥有进程或 Subagent 服务时提供，Ask/Execute 均可用，不取决于
 本轮 Shell 可用性、是否允许再次委派或委派深度。读取只接受当前会话的句柄；其他 Runtime
 不注册该工具，调用边界同样拒绝。
@@ -148,6 +151,8 @@ type SubagentDelegateResult = {
 - 子级不能请求更高模式。
 - 子级使用父请求开始时的工具与能力快照；运行中设置变化不重写快照。
 - 子级调用 MCP、浏览器或知识能力时继续经过这些能力已有的作用域和生命周期边界。
+- FR-5 / FR-7 / US-C1：Execute 子级使用父请求的浏览器标签页，不另开标签页或改变所有权；
+  子级结束后父模型仍可继续操作该页，父请求继续负责其使用租约。
 - Execute 子级不弹出额外的“Subagent 执行授权”，也不获得父级没有的 MCP 分配。
 
 ## 9. 并发和顺序