fix: prioritize realtime reminder archive with cold-start fallback

apps/lib/features/calendar/reminders/reminder_action_executor.dart

@@ -1,5 +1,7 @@
 import 'dart:math';
 
+import 'package:flutter/widgets.dart';
+
 import '../data/services/calendar_service.dart';
 import '../../../core/notifications/local_notification_service.dart';
 import 'models/reminder_action.dart';
@@ -11,16 +13,23 @@ class ReminderActionExecutor {
   final LocalNotificationService _notificationService;
   final ReminderOutboxStore _outboxStore;
   final Random _random;
+  final bool Function() _isAppActive;
 
   ReminderActionExecutor({
     required CalendarService calendarService,
     required LocalNotificationService notificationService,
     required ReminderOutboxStore outboxStore,
     Random? random,
+    bool Function()? isAppActive,
   }) : _calendarService = calendarService,
        _notificationService = notificationService,
        _outboxStore = outboxStore,
-       _random = random ?? Random();
+       _random = random ?? Random(),
+       _isAppActive =
+           isAppActive ??
+           (() =>
+               WidgetsBinding.instance.lifecycleState ==
+               AppLifecycleState.resumed);
 
   Future<void> handleAction({
     required ReminderAction action,
@@ -86,6 +95,11 @@ class ReminderActionExecutor {
   }
 
   Future<void> _archiveEvent(String eventId, ReminderAction action) async {
+    if (_isAppActive()) {
+      await _calendarService.archiveEvent(eventId);
+      return;
+    }
+
     final opId =
         '${DateTime.now().millisecondsSinceEpoch}-${_random.nextInt(1 << 32)}';
     final outboxItem = ReminderOutboxItem(
@@ -96,11 +110,5 @@ class ReminderActionExecutor {
       occurredAt: DateTime.now(),
     );
     await _outboxStore.enqueue(outboxItem);
-    try {
-      await _calendarService.archiveEvent(eventId);
-      await _outboxStore.markDone(opId);
-    } catch (error) {
-      await _outboxStore.markRetry(opId, error.toString());
-    }
   }
 }