Review follow-up (Requirements Engineer, Leonie) — closes the unmet
acceptance row. The coach card's "press ?" tip rendered unconditionally, so
a touch-only tablet transcriber (no hardware keyboard) was told to press a
key they don't have. The hint is now gated behind a fine-pointer media
query ([@media(pointer:coarse)]:hidden); the cheatsheet itself only opens
via the "?" key, so it already never surfaces without a keyboard. Also bumps
the key cap from 11px to text-xs for the 60+ audience.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds a secondary keyboard hint to the existing coach footer row pointing
transcribers at the "?" cheatsheet, with a semantic <kbd>. Cross-references
the shortcuts introduced for the empty-state coach (#320).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
