Date: 2026-01-09 00:00 Summary: Added a Bootstrap static home page with nav, collapsible sidebar, cards, and footer.
[question] 增加静态首页，以bootstrap+js+html作为技术栈，适配h5和pc，布局为导航，具备sidebar（可点击隐藏），顶部菜单，底部footer，内容区为工具分类成列卡片。分类类别名称在sidebar
[try to solve]
Added a Bootstrap 5 static home page in public/index.html for mobile and desktop:
- Fixed top nav (with search)
- Collapsible category sidebar; collapses after category click on mobile
- Content area: category card grids (sample categories/placeholders)
- Footer
[actions]
- Created
public/index.html