Per playtest feedback:
- Drop the per-challenge 'Plays:' line — redundant with the card column and the
event log (also removes the now-unused chPlays const).
- Drop the 'Attempted by … drag a card … assist' how-to paragraph; players know
the basics, and the challenge header already names who's challenged.
- Replace the 'Red/Black Obstacle · match to draw' tag with the original card in
the title (e.g. '5♣ — Loitering Mermaid'), and color the title by suit. The
left border already marks color; the dead .obstacle-color-tag CSS is removed.
Suit glyphs in the title use plain text symbols (not SUIT_EMOJI) so they take
the theme-aware suit color and stay readable on the dark panel. Verified in
light and dark.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>