The daily reminder job ran at a hardcoded 6 AM. Make the hour configurable:
- dailyWorker: resolveReminderHour() reads the global 'reminder_hour' setting
(clamp 0–23, default 6) as the single source for both the cron expression and
the next-run display; the task is stored so rescheduleDailyWorker() can restart
it live (defensively wrapped so a bad value can't take the worker down).
- notifications admin GET/PUT expose reminder_hour; PUT clamps, persists, and
live-reschedules the worker.
- Admin Email Notifications card: a "Reminder send time" select (account-wide).
It's a global setting by design — there's one shared daily job, so a per-user
hour would require an hourly-worker refactor (out of scope) and would otherwise
be a dead setting.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>