2025-10-12
TOC addon links with ul structure
- Extensible ul list at bottom of right sidebar for addon links
- Comments link when Remarkbox enabled
- Fix header margin-top: 0 to remove default spacing
- Border-top separator for addon section
- Ready for additional links (Share, Print, etc)

2025-10-11
Dark mode implementation complete
- Default dark theme with light mode toggle
- Progressive enhancement (buttons hidden without JS)
- Fixed header with proper content padding
- UncloseAI button styling without !important
- Theme preference saved to localStorage
2025-10-11 - Remarkbox dark mode integration
2025-10-12 - Add 80px bottom margin to TOC addon links
