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/model-connections/README.md

@@ -12,6 +12,10 @@ Provider 要求的附加元数据；GoodBuddy 只在直连链路或 Runtime 明
 | [技术设计](./technical-design.md) | 契约、持久化、合并优先级、Runtime 支持矩阵和验证 |
 | [功能进度](./progress.md) | 已验证实现、剩余工作和验证证据 |
 
+模型连接选择准确性也在本目录维护：技术设计第 8 节定义通道直连回退修复，
+UI 设计末节定义 Harness 来源标签和公开设置展示；Harness 的实际解析顺序由其
+[技术设计](../deepseek-harness/technical-design.md#121-配置来源)唯一维护。
+
 本次改动是现有模型连接的有界扩展，不新增独立业务对象或工作流，因此不单独建立 PRD、
 User Stories 和逻辑设计；本页定义产品边界，技术设计定义唯一的请求合并规则。