- Add explicit overflow: visible to main pane
- Add height: auto to main pane
- Ensure three-pane container doesn't constrain height
- Force styles to override any inherited overflow
- Convert mobile hamburger and highlights buttons to Tailwind
- Migrate mobile backdrop to Tailwind utilities
- Remove 60+ lines of CSS from app.css and sidebar.css
- Maintain responsive behavior and z-index layering
- Keep dynamic color support for highlight button