- The learner's own typed Other answer now renders INSIDE the options
container in the answered card, styled exactly like its selected
siblings (border-primary bg-accent) — it is an option, not a loose
quote floating outside the list. Quotes keep the learner's words.
- The thinking field submits with ⌘↵ on macOS, Ctrl↵ elsewhere
(metaKey || ctrlKey — the Gmail convention, same handler on every
platform). Plain Enter stays a newline: the field is for dumping.
A quiet "⌘/Ctrl + ↵ submits" hint sits next to Submit for
discoverability (text mode keeps Enter-to-submit, no hint).