Owner correction (2026-10-06): the floating chip clipped inside the
composer band. Replaced with the button morph: an EMPTY composer in
the between-problems pause renders a wide green 'Next problem' button
(bg-green-600 — the answered-card correct register, mono-caps label,
arrow glyph); typing anything returns the regular white send; busy
(steer/stop) outranks the morph. Click and Enter share the one
act() lane, so the button also teaches the Enter-on-empty behavior.
The wrapper div + chip are gone from chat.tsx; inputAppends widens
its record param to { messages; kind? } (the practice gate reads it
without a cast).
amosblomqvist
d1f085550b