Managed calendars now treat reminders as a calendar-level setting instead of the
seed-once-per-event model, matching how these homogeneous birthday/anniversary
calendars are actually used.
- New per-type "Reminders" control in the Contact special dates section. Changing
it persists the per-calendar all-day override (so new events match) AND
re-applies the set to *all existing events* in that calendar
(CalendarDataSource.applyManagedCalendarReminders → SpecialDatesSyncEngine
.applyReminders), encoding each event's all-day offset from its own date.
- Settings → Notifications: the contact-date calendars no longer offer a
per-calendar override row; they show a link that jumps to the Contact special
dates section (managedCalendarIds now in SettingsUiState).
Tests cover applyReminders (override persisted + bulk-apply invoked, and None
clears). lint + unit tests + assembleDebug green.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>