/openemoji/catalog reads the set's openemoji.json (every Unicode emoji,
drawn or not) and filters by name and CLDR keyword, group, subgroup,
skin tone (keyboard-style swap), Emoji version and status, with sort,
tile size, URL-synced filters, paged rendering and a detail panel
(codepoints, tone family, copy, PNG/SVG downloads, keyword chips).
Spec: an entry without files is listed, not drawn.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
