Replace old notification handlers with smart reminder system

- Add TaskReminderLog to AutoMigrate (table was missing)
- Remove HandleTaskReminder and HandleOverdueReminder registrations
- Register HandleSmartReminder which uses frequency-aware scheduling
  and tracks sent reminders to prevent duplicates

The old handlers sent ALL overdue tasks daily regardless of age.
Smart reminder tapers off (daily for 3 days, then every 3 days, stops at 14).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

cmd/worker/main.go

@@ -134,8 +134,7 @@ func main() {
 
 	// Create Asynq mux and register handlers
 	mux := asynq.NewServeMux()
-	mux.HandleFunc(jobs.TypeTaskReminder, jobHandler.HandleTaskReminder)
+	mux.HandleFunc(jobs.TypeSmartReminder, jobHandler.HandleSmartReminder)
-	mux.HandleFunc(jobs.TypeOverdueReminder, jobHandler.HandleOverdueReminder)
 	mux.HandleFunc(jobs.TypeDailyDigest, jobHandler.HandleDailyDigest)
 	mux.HandleFunc(jobs.TypeSendEmail, jobHandler.HandleSendEmail)
 	mux.HandleFunc(jobs.TypeSendPush, jobHandler.HandleSendPush)
@@ -144,18 +143,13 @@ func main() {
 	// Start scheduler for periodic tasks
 	scheduler := asynq.NewScheduler(redisOpt, nil)
 
-	// Schedule task reminder notifications (runs every hour to support per-user custom times)
+	// Schedule smart reminder notifications (runs every hour to support per-user custom times)
-	// The job handler filters users based on their preferred notification hour
+	// Replaces old task reminder and overdue reminder with frequency-aware system
-	if _, err := scheduler.Register("0 * * * *", asynq.NewTask(jobs.TypeTaskReminder, nil)); err != nil {
+	// Uses TaskReminderLog to prevent duplicate notifications
-		log.Fatal().Err(err).Msg("Failed to register task reminder job")
+	if _, err := scheduler.Register("0 * * * *", asynq.NewTask(jobs.TypeSmartReminder, nil)); err != nil {
+		log.Fatal().Err(err).Msg("Failed to register smart reminder job")
 	}
-	log.Info().Str("cron", "0 * * * *").Int("default_hour", cfg.Worker.TaskReminderHour).Msg("Registered task reminder job (runs hourly for per-user times)")
+	log.Info().Str("cron", "0 * * * *").Int("default_hour", cfg.Worker.TaskReminderHour).Msg("Registered smart reminder job (runs hourly for per-user times)")
-
-	// Schedule overdue reminder (runs every hour to support per-user custom times)
-	if _, err := scheduler.Register("0 * * * *", asynq.NewTask(jobs.TypeOverdueReminder, nil)); err != nil {
-		log.Fatal().Err(err).Msg("Failed to register overdue reminder job")
-	}
-	log.Info().Str("cron", "0 * * * *").Int("default_hour", cfg.Worker.OverdueReminderHour).Msg("Registered overdue reminder job (runs hourly for per-user times)")
 
 	// Schedule daily digest (runs every hour to support per-user custom times)
 	// The job handler filters users based on their preferred notification hour

internal/database/database.go

@@ -144,6 +144,7 @@ func Migrate() error {
 		&models.NotificationPreference{},
 		&models.APNSDevice{},
 		&models.GCMDevice{},
+		&models.TaskReminderLog{}, // Smart reminder tracking
 
 		// Subscription tables
 		&models.SubscriptionSettings{},