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/computer-control/progress.md

@@ -92,14 +92,11 @@ Linux x64 和 Linux arm64。
 
 ### P0：右侧没有浏览器实时画面，已修复
 
-浏览器窗口默认使用 `show: false`，但 BrowserService 现在从模型实际操作的同一
-会话捕获页面帧，并通过受限 IPC 发送状态、当前 URL 和约 220KB 的 JPEG 画面。右侧工作栏
-新增“浏览器”页签；活动对话启动浏览器时会自动打开该页签，并显示创建中、
-加载中、操作中、用户交互中、就绪、失败和已停止状态。用户可点击“交互”打开
-同一会话的子窗口辅助 Agent；交互时主窗口暂时禁用，关闭时先刷新最终画面再将
-浏览器窗口最小化，页面和会话继续保留。用户也可明确关闭当前对话的浏览器会话。
-当前实现按导航、快照、点击、输入、选择、返回和截图操作刷新画面，而不是创建
-第二个预览浏览器，因此显示内容与模型受控页面一致。
+早期版本通过同一浏览器会话的 JPEG 帧提供预览。当前工作栏直接嵌入 Agent 操作的原生
+`WebContentsView`，不再自动截图或传输预览帧，也不再用独立交互窗口阻塞主界面。
+页面显示、标签页归属、失败重试和显式截图的当前规则统一见
+[浏览器多实例技术设计](../assistant-workbar/browser-tabs-technical-design.md)；
+该路径的最新验证证据见[工作栏进度](../assistant-workbar/progress.md)。
 
 ### 已实现：浏览器工具栏