- [x] Fix markdown cheatsheet modal 500 error — missing `require_once bootstrap.php` in `app/public/admin/markdown-cheatsheet-fragment.php`
- [x] Add `padding-bottom` to `.md-cheatsheet-dialog` so last table row isn't flush against dialog edge
- [x] Add independent scrollbar for TOC in charte/licence/apropos + admin pages (max-height + overflow-y: auto on .toc desktop)