Reminders never fire for a calendar hidden at system level, and nothing in
the app hints at it: the provider only schedules reminder alarms for
Calendars.VISIBLE=1, while Calendula filters with its own disabledCalendarIds
pref and parses isVisibleInSystem without ever using it.
Captures the decision to collapse to one model (the Settings → Calendars
toggle becomes Calendars.VISIBLE, the filter sheet stays app-local), the
verified provider behaviour behind it — including that VISIBLE is device-local
and that a non-`_id=` selection makes the provider skip its own
checkNextAlarm() reschedule — the narrowed migration, and what gets deleted.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Jean-Luc Makiola
97f650da14