TODO

1. Light/Dark
2. Change font
3. Summary & Read More & Picture Preview (Optional)
4. Password protection for some posts
5. KaTeX support
6. Home Logo
7. 404 page
8. TOC on right side in Post page
9. Add Moments page
10. medium-zoom / fancybox
11. Multi Language
12. Tag & Category
13. Content collection support for Archive page
14. Update code theme
15. Improve heading display and support anchor links