Add mobile-specific navigation pattern to resolve catch-22 UX issue where
users couldn't see documents without scrolling but didn't know to scroll.
Changes:
- Add mobile CSS to toggle between sidebar and document viewer
- Add back button to return to document list on mobile
- Add document-active body class to manage navigation state
- Update GitHub repository links to correct URL
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
41a13ad43e