- BackupSchedule model + schedule_service: next-run calc (hourly/daily/weekly,
UTC), background scheduler loop (lifespan), run-one with retention pruning
(keep newest N per stack on the destination), backup_failed notify event.
- routers/schedules.py: schedules CRUD + run-now; registered in main.py.
- Frontend: api/schedules.ts + Settings → Scheduled backups (list with next/last
run + status, enable/disable, run-now, delete; add form with stack/destination/
frequency/time/weekday/retention/volumes).
Rough-verified only (per request): py_compile, frontend tsc build, app import
(95 routes), next-run math sanity. Full live run to be tested after deploy.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>