feat: improve desktop runtime and user diagnostics

[Luhaozhu]

Summary / 概述

• Sync the generated CE tree through upstream commit c78827cd, retaining the pending desktop 0.2.2 reliability fixes already included in this PR.
• Complete the local desktop runtime on Windows and macOS: install persistent-memory dependencies, provision native Git Bash on Windows, use the active virtualenv Python, translate workspace paths safely, and terminate subprocess trees correctly across platforms.
• Add ownership-scoped detail data for personal tool, skill, and sub-agent logs, plus a typed frontend detail drawer with nested steps and internal calls.
• Improve first-run setup with stable viewport scrolling, inline save errors, and consistent logout confirmation without WebView overlay flashes.
• Expand CE desktop CI and regression coverage for Windows dependency resolution, memory installation, Bash discovery, path rewriting, and process limits.

The user-visible result is a more complete local desktop installation, safer cross-platform script execution, inspectable personal agent activity, and a smoother onboarding/logout flow.

Related issue / 关联 Issue

No linked issue.

Type of change / 变更类型

• 📖 Documentation (document/**, README*.md)
• 🧩 Example / sample (examples/**)
• 🔧 Repo meta (CI, templates, .github/**)
• Other (please describe / 请说明): maintainer-generated CE sync of desktop, backend, frontend, and regression-test changes

Checklist / 检查项

• My change only touches non-generated paths (docs / examples / repo meta). 仅改动非生成路径。（本 PR 是维护者从上游确定性派生的 CE 同步，包含生成代码。）
• Links and code snippets were verified. 链接与代码片段已验证。（本次未修改文档链接或示例。）
• For bilingual docs, I updated both document/en/** and document/zh-CN/** where applicable. 双语文档已同步更新（如适用）。（本次不涉及文档。）
• I read CONTRIBUTING.md. 我已阅读贡献指南。

Validation / 验证

• Clean CE release derivation passed copy, transform, required-runtime, forbidden-artifact, brand, license, import, pytest-collection, frontend-build, and cleanup gates.
• Backend targeted tests: 21 passed.
• Desktop Node script tests: 15 passed.
• Desktop Rust tests: 16 passed.
• Frontend production build and i18n validation passed.
• ESLint on all modified frontend TypeScript files passed with 0 errors and 1 pre-existing warning; the repository-wide lint remains blocked by unrelated baseline violations.
• git diff --check passed for both the upstream and generated CE changes.