- Drop btnCancel element and all JS show/hide call sites across
boot.js, messages.js, sessions.js, ui.js (superseded by single
primary action button)
- Remove .cancel-btn CSS rules including mobile media-query override
- Route updateSendBtn() title/aria-label through t() with English
fallbacks; add composer_send/queue/interrupt/steer/stop keys to all
7 locales (en, ru, es, de, zh, zh-Hant, ko)
- Branch disabled-state tooltip on reason: clarify lock, compression
running, or idle-empty, each with its own i18n key
- Update test_sprint10 / test_sprint36 to reflect single-button model:
assert btnSend present and id="btnCancel" absent; replace
test_hides_cancel_button with test_clears_composer_status
9d5480565f
