Block a user
feat(ui): present page-action editors as sheets on mobile
feat(nav): give admins a mobile entry point to the admin area
fix(collections): make per-card remove buttons usable on touch
fix(manga): show force-resync result on mobile, not just desktop
feat(reader): surface brightness on desktop, not just the mobile sheet
refactor(ui): fold the 36px header/search buttons into IconButton
refactor(ui): extract shared IconButton from duplicated .icon-btn copies