feat: unify execution and add workspace file imports

Remove Ask/Execute modes and general product tool approvals so requests use the selected runtime, enabled capabilities, and execution account permissions. Migrate retired application metadata while preserving user content.

Retire the Results page while retaining conversation images and stored artifacts. Add local and remote workspace file imports, timestamps and sorting, improve image discovery and saving, and refine workspace navigation and supervision responsiveness. Include the accompanying web-search changes, tests, probes, and product documentation.

Remote imports require an updated Agent. Existing artifacts are not automatically copied into project directories. Validation evidence and outstanding failures remain documented in feature progress files; no full test suite or real-model calls were rerun for this commit.

Release note: Run requests without switching work modes, import files into a selected local or remote workspace folder, sort workspace files by date, and keep using conversation images after removal of the Results page.

docs/features/office-document-editing/technical-design.md

@@ -164,9 +164,9 @@ ShareServer 托管固定版本的 GoodBuddy ONLYOFFICE 插件。插件只能：
 
 首期优先让插件通过 ShareServer 会话通道与 Desktop 交换事件，不给远端编辑页面添加通用
 Electron preload。ShareServer 只中继有界事件；Agent 请求仍由 Desktop 创建并经过现有
-Conversation、模型、Ask/Execute、取消和活动记录边界。
+Conversation、模型、能力范围、取消和活动记录边界。
 
-Ask 请求可以返回可复制的修改建议，但 Main 拒绝向插件下发写操作。只有 Execute 请求能够
+仅要建议的请求返回可复制文本，不下发编辑操作。修改请求
 取得绑定当前文档会话、revision 和选区的短期编辑 Grant；该 Grant 不包含源文件路径，也不能
 用于其他文档、文件工具或系统能力。