A 429 panel whose cooldown recomputes from an absolute target instant, so a suspended tab wakes up to the right number — auto-unlock with milestone-only announcements and no auto-retry, remaining quota with icon/word/outline urgency, consecutive-backoff labelling and an upgrade CTA.
npx shadcn@latest add @zyeon/rate-limit-noticeZyeon UI limits how often it can be asked, and Rate Limit Notice hasn't had its turn. Its source will show here once it has.