chore: add dev script - #666

- Bump version to 1.9.0 in package.json, package-lock.json, .opencode/package.json
- Add v1.9.0 changelog with 212 commits covering selective install architecture,
  6 new agents, 15+ new skills, session/state infrastructure, observer fixes,
  12 language ecosystems, and community contributions
- Update README with v1.9.0 release notes and complete agents tree (27 agents)
- Add pytorch-build-resolver to AGENTS.md agent table
- Update documentation counts to 27 agents, 109 skills, 57 commands
- Update version references in zh-CN README
- All 1421 tests passing, catalog counts verified

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…rding-copy]

在初版「空状态欢迎文案」基础上,随 user 真机迭代完成首页 home 完整视觉定稿:
- 引导文案从空状态分支提为常驻顶部(有无最近项目都显示),Switch→Show
- 换上 DeskFoX.Ai 品牌 wordmark SVG(新 fork 组件 deskfox-wordmark.tsx,半透明 0.5)
- 标题加粗 + 中灰 anomalyco#666、副标题一行、标题文案精简为「你的专属 AI 助理已就绪」
- 钢蓝 #7295C4 实心 CTA「打开文件夹」(色取自 logo),常驻、居中、43px 高
- 列宽固定 552px 居中;去掉「最近项目」头部重复打开按钮
- i18n key home.empty.*→home.welcome.*,全 17 语言;品牌色走 index.css 自有 CSS 变量(R3)

根容器改 flex items-center 修 inline-flex 按钮居中;标题用显式 anomalyco#666(主题把 --text-base 覆成近黑)。
CDP 实测:按钮/标题居中、标题灰度、CTA 尺寸均符合预期。i18n 测试 15 绿 / typecheck 通过。

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>