feat: add remote pull and push

lib/viewmodels/bar_screen_view_model.dart

@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:flutter/foundation.dart';
 import 'package:sentry_flutter/sentry_flutter.dart';
 
@@ -5,15 +7,29 @@ import '../models/payment_method.dart';
 import '../models/bar_tab.dart';
 import '../models/product.dart';
 import '../models/tab_item.dart';
+import '../models/remote_command.dart';
 import '../services/bar_tab_service.dart';
 import '../services/product_service.dart';
 import 'inventory_view_model.dart';
+import 'remote_sync_view_model.dart';
 
 class BarScreenViewModel extends ChangeNotifier {
   final BarTabService barTabService;
   final InventoryViewModel inventory;
+  final RemoteSyncViewModel remoteSyncViewModel;
 
-  BarScreenViewModel({required this.barTabService, required this.inventory});
+  BarScreenViewModel({
+    required this.barTabService,
+    required this.inventory,
+    required this.remoteSyncViewModel,
+  }) {
+    _eventSubscription = remoteSyncViewModel.syncService.events.listen(_onRemoteEvent);
+  }
+
+  StreamSubscription<RemoteSyncEvent>? _eventSubscription;
+
+  RemoteSyncEvent? _lastRemoteEvent;
+  RemoteSyncEvent? get lastRemoteEvent => _lastRemoteEvent;
 
   List<BarTab> _tabs = [];
   String? _selectedTabId;
@@ -42,6 +58,24 @@ class BarScreenViewModel extends ChangeNotifier {
     }
   }
 
+  void _onRemoteEvent(RemoteSyncEvent event) {
+    _lastRemoteEvent = event;
+    notifyListeners();
+    if (event.type == RemoteSyncEventType.tabClosedRemotely) {
+      _reloadTabs();
+    }
+  }
+
+  void clearRemoteEvent() {
+    _lastRemoteEvent = null;
+  }
+
+  @override
+  void dispose() {
+    _eventSubscription?.cancel();
+    super.dispose();
+  }
+
   Future<void> ensureLoaded() async {
     if (_hasLoaded || _isLoading) return;
 
@@ -72,6 +106,11 @@ class BarScreenViewModel extends ChangeNotifier {
     }
   }
 
+  Future<void> loadAndSync() async {
+    await load();
+    await remoteSyncViewModel.syncNow();
+  }
+
   void selectTab(String tabId) {
     _selectedTabId = tabId;
     notifyListeners();