refactor(calendar): remove deprecated reminder components

apps/lib/core/notifications/local_notification_service.dart

@@ -4,7 +4,6 @@ import 'dart:convert';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter_local_notifications/flutter_local_notifications.dart';
-import 'package:shared_preferences/shared_preferences.dart';
 import 'package:timezone/data/latest.dart' as tz_data;
 import 'package:timezone/timezone.dart' as tz;
 
@@ -12,8 +11,6 @@ import 'reminder_notification_callbacks.dart';
 import '../../features/calendar/data/models/schedule_item_model.dart';
 import '../../features/calendar/reminders/models/reminder_action.dart';
 import '../../features/calendar/reminders/models/reminder_payload.dart';
-import '../../features/calendar/reminders/reminder_action_dedupe_store.dart';
-import '../../features/calendar/reminders/reminder_overlap_policy.dart';
 
 typedef ReminderNotificationActionHandler =
     Future<void> Function({
@@ -38,9 +35,7 @@ class LocalNotificationService {
   static const String _actionSnooze = 'snooze10m';
 
   final FlutterLocalNotificationsPlugin _plugin;
-  final ReminderOverlapPolicy _overlapPolicy;
   final ReminderPermissionFallbackTracker? _permissionFallbackTracker;
-  ReminderActionDedupeStore? _dedupeStore;
   bool _initialized = false;
   bool _canDeliverSystemNotification = true;
   ReminderNotificationActionHandler? _actionHandler;
@@ -50,12 +45,8 @@ class LocalNotificationService {
 
   LocalNotificationService({
     FlutterLocalNotificationsPlugin? plugin,
-    ReminderOverlapPolicy? overlapPolicy,
-    ReminderActionDedupeStore? dedupeStore,
     ReminderPermissionFallbackTracker? permissionFallbackTracker,
   }) : _plugin = plugin ?? FlutterLocalNotificationsPlugin(),
-       _overlapPolicy = overlapPolicy ?? const ReminderOverlapPolicy(),
-       _dedupeStore = dedupeStore,
        _permissionFallbackTracker = permissionFallbackTracker;
 
   void bindActionHandler(ReminderNotificationActionHandler handler) {
@@ -128,19 +119,9 @@ class LocalNotificationService {
         >();
     await iosImpl?.requestPermissions(alert: true, badge: true, sound: true);
 
-    await _ensureDedupeStore();
-
     _initialized = true;
   }
 
-  Future<void> _ensureDedupeStore() async {
-    if (_dedupeStore != null) {
-      return;
-    }
-    final prefs = await SharedPreferences.getInstance();
-    _dedupeStore = ReminderActionDedupeStore(prefs);
-  }
-
   Future<void> _refreshAndroidNotificationAvailability() async {
     if (defaultTargetPlatform != TargetPlatform.android) {
       return;
@@ -166,8 +147,9 @@ class LocalNotificationService {
     }
 
     final now = DateTime.now();
-    final fireAt = _overlapPolicy.resolveFirstFireAt(event, now: now);
-    if (fireAt == null) {
+    final reminderMinutes = event.metadata?.reminderMinutes ?? 0;
+    final fireAt = event.startAt.subtract(Duration(minutes: reminderMinutes));
+    if (fireAt.isBefore(now)) {
       await cancelEventReminder(event.id);
       return;
     }
@@ -225,31 +207,21 @@ class LocalNotificationService {
   ) async {
     await initialize();
     await _refreshAndroidNotificationAvailability();
-    if (!_canDeliverSystemNotification) {
-      _clearAllInAppFallbackTimers();
-      final now = DateTime.now();
-      final groups = _overlapPolicy.groupByMinute(events, now: now);
-      for (final group in groups) {
-        if (group.isAggregate) {
-          await _scheduleInAppAggregateFallback(group.events, group.fireAt);
-          continue;
-        }
-        await _scheduleInAppFallbackRemindersFrom(
-          event: group.events.first,
-          firstFireAt: group.fireAt,
+    for (final event in events) {
+      if (!_canDeliverSystemNotification) {
+        final reminderMinutes = event.metadata?.reminderMinutes ?? 0;
+        final fireAt = event.startAt.subtract(
+          Duration(minutes: reminderMinutes),
         );
-      }
-      return;
-    }
-
-    final now = DateTime.now();
-    final groups = _overlapPolicy.groupByMinute(events, now: now);
-    for (final group in groups) {
-      if (group.isAggregate) {
-        await _scheduleAggregateReminder(group.events, group.fireAt);
+        if (fireAt.isAfter(DateTime.now())) {
+          await _scheduleInAppFallbackRemindersFrom(
+            event: event,
+            firstFireAt: fireAt,
+          );
+        }
         continue;
       }
-      await upsertEventReminder(group.events.first);
+      await upsertEventReminder(event);
     }
   }
 
@@ -693,21 +665,6 @@ class LocalNotificationService {
       return;
     }
 
-    final dedupeStore = _dedupeStore;
-    if (dedupeStore != null) {
-      final notificationId = response.id?.toString() ?? payload.eventId;
-      final fireTimeBucket =
-          payload.fireTimeBucket ??
-          (payload.startAt.millisecondsSinceEpoch ~/
-              const Duration(minutes: 1).inMilliseconds);
-      final actionExecutionId =
-          '$notificationId|${action.value}|$fireTimeBucket';
-      final isNew = await dedupeStore.markIfNew(actionExecutionId);
-      if (!isNew) {
-        return;
-      }
-    }
-
     await handler(action: action, payload: payload);
   }
 }

apps/lib/core/notifications/reminder_notification_callbacks.dart

@@ -5,8 +5,6 @@ import 'package:flutter/foundation.dart';
 import 'package:flutter_local_notifications/flutter_local_notifications.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
-import '../../features/calendar/reminders/reminder_cold_start_queue.dart';
-
 typedef ReminderNotificationResponseHandler =
     Future<void> Function(NotificationResponse response);
 
@@ -15,8 +13,6 @@ class ReminderNotificationCallbacks {
       'calendar_reminder_pending_notification_responses_v1';
   static ReminderNotificationResponseHandler? _responseHandler;
   static Future<void> _pendingStorageLock = Future<void>.value();
-  static final ReminderColdStartQueue _coldStartQueue =
-      ReminderColdStartQueue();
 
   @visibleForTesting
   static Future<void> resetForTest() async {
@@ -106,38 +102,35 @@ class ReminderNotificationCallbacks {
 
       final remaining = <String>[];
       for (final raw in pending) {
-        _coldStartQueue.enqueue(() async {
-          Map<String, dynamic> parsed;
-          try {
-            parsed = Map<String, dynamic>.from(jsonDecode(raw) as Map);
-          } catch (_) {
-            return;
-          }
+        Map<String, dynamic> parsed;
+        try {
+          parsed = Map<String, dynamic>.from(jsonDecode(raw) as Map);
+        } catch (_) {
+          continue;
+        }
 
-          final id = parsed['id'] as int?;
-          final actionId = parsed['actionId'] as String?;
-          final payload = parsed['payload'] as String?;
-          final typeIndex = (parsed['type'] as int?) ?? 0;
-          final input = parsed['input'] as String?;
-          final type = NotificationResponseType.values[typeIndex.clamp(0, 1)];
+        final id = parsed['id'] as int?;
+        final actionId = parsed['actionId'] as String?;
+        final payload = parsed['payload'] as String?;
+        final typeIndex = (parsed['type'] as int?) ?? 0;
+        final input = parsed['input'] as String?;
+        final type = NotificationResponseType.values[typeIndex.clamp(0, 1)];
 
-          try {
-            await handler(
-              NotificationResponse(
-                id: id,
-                actionId: actionId,
-                payload: payload,
-                input: input,
-                notificationResponseType: type,
-              ),
-            );
-          } catch (_) {
-            remaining.add(raw);
-          }
-        });
+        try {
+          await handler(
+            NotificationResponse(
+              id: id,
+              actionId: actionId,
+              payload: payload,
+              input: input,
+              notificationResponseType: type,
+            ),
+          );
+        } catch (_) {
+          remaining.add(raw);
+        }
       }
 
-      await _coldStartQueue.replay();
       if (remaining.isEmpty) {
         await prefs.remove(_pendingKey);
         return;