Add "Snooze" and "Dismiss" action buttons to reminder notifications.
The app is otherwise pure provider-broadcast (the Etar model): the calendar
provider fires EVENT_REMINDER and we post the notification, then mark the
CalendarAlerts row fired. A snoozed reminder has no provider backing — its
row is already fired — so snooze self-schedules an exact alarm to re-show
the same notification, while primary delivery is left unchanged.
- ReminderActionReceiver (not exported): SNOOZE cancels + schedules a
re-show, DISMISS cancels, SHOW (the alarm) re-posts so it can be snoozed
or dismissed again.
- ReminderSnoozeScheduler: setExactAndAllowWhileIdle, with an inexact
allow-while-idle fallback if exact alarms are revoked (API 31-32).
- ReminderNotifier: two actions + cancel().
- snoozeMinutes pref (default 10) in Settings -> Notifications, OptionPicker
presets 5/10/15/30/60.
- Manifest: USE_EXACT_ALARM + SCHEDULE_EXACT_ALARM (maxSdk 32) + receiver.
- New ic_notification_snooze/_dismiss drawables, duration plurals, en+de
strings, snooze-pref tests.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
