Folds in three rounds of requirement evolution:
* Pause/resume on window close (was stop-and-report-partial).
* ETA preview pill at compose / edit time so the operator sees
whether their chosen window will fit before scheduling.
* Interactive paused-run banner with Resume / Cancel buttons on the
detail page; pause notification deep-links to it.
Helper relocations:
* windowEndAt() moves to packages/shared so both bot fire-reminder
and the web ETA pill can import the same calculator.
Plan grows from 8 to 10 tasks: adds Task 9 (run-eta + RunEtaPill,
TDD) and Task 10 (resume/cancel actions + PausedRunBanner).
Acceptance gains two paused-flow smoke tests.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
yiekheng
082a70db06