Fix duplicate alarm bug where updating schedule time created multiple
schedules in database, violating "one notification per day" contract.
Plugin Changes:
- Use stable scheduleId "daily_notification" instead of timestamp-based IDs
- Delete all existing notification schedules before creating new one
- Cancel alarms in AlarmManager before database deletion
- Add detailed logging for cleanup operations
- Make scheduleDailyReminder delegate to scheduleDailyNotification
Test Harness Changes:
- Make TEST 2 fail when alarm count > 1 after schedule update
- Make TEST 2 fail when alarm count > 1 after recovery
- Add clear failure messages explaining "one per day" violation
- Add final verdict section with detailed failure summary
Results:
- Before: 2-3 alarms, 2 schedules in DB, "Pending: 2" in UI
- After: 1 alarm, 1 schedule in DB, "Pending: 1" in UI
- TEST 2 now correctly passes with proper validation
This ensures that updating schedule time maintains exactly one alarm
per day, preventing duplicate notifications and database bloat.
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