1 feat: 添加变量导入模板配置和工厂模式实现

2
    3 -
      在AppSettings中添加VariableImportTemplate配置项，用于设置变量导入的默认参数（IsActive、PollingIn
      terval、IsHistoryEnabled、HistoryDeadband）
    4 - 修改AppSettings.Load()方法，优化配置加载逻辑
    5 -
      实现IVariableItemViewModelFactory和VariableItemViewModelFactory，使用工厂模式创建VariableItemVie
      wModel实例
    6 - 在ImportOpcUaDialogViewModel中使用工厂创建VariableItemViewModel实例，以应用默认配置
    7 -
      在SettingViewModel和SettingView中添加变量导入设置界面和相关属性（VariablePollingInterval、Variab
      leIsActive、VariableIsHistoryEnabled、VariableHistoryDeadband）
    8 - 移除VariableItemViewModel构造函数中的轮询间隔默认值设置，改由工厂模式设置
    9 - 优化SplashViewModel中配置加载逻辑
   10 - 移除MainView.xaml.cs中已注释的代码
   11 - 调整VariableTableView.xaml的UI布局和菜单结构
   12 - 注册IVariableItemViewModelFactory服务

  这些修改主要实现了几个关键功能：
   1. 引入了工厂模式来创建VariableItemViewModel实例，确保所有新创建的变量项都应用默认配置
   2. 添加了变量导入模板设置，用户可以在设置界面自定义导入变量的默认属性
   3. 对相关UI进行了调整和优化

DMS.WPF/ViewModels/SettingViewModel.cs

@@ -135,19 +135,63 @@ public partial class SettingViewModel : ViewModelBase
         }
     }
     
-    public int DefaultPollingInterval
+    public int VariablePollingInterval
     {
-        get => _settings.DefaultPollingInterval;
+        get => _settings.VariableImportTemplate.PollingInterval;
         set
         {
-            if (_settings.DefaultPollingInterval != value)
+            if (_settings.VariableImportTemplate.PollingInterval != value)
             {
-                _settings.DefaultPollingInterval = value;
+                _settings.VariableImportTemplate.PollingInterval = value;
                 OnPropertyChanged();
                 _settings.Save();
             }
         }
     }
+    
+    public bool VariableIsActive
+    {
+        get => _settings.VariableImportTemplate.IsActive;
+        set
+        {
+            if (_settings.VariableImportTemplate.IsActive != value)
+            {
+                _settings.VariableImportTemplate.IsActive = value;
+                OnPropertyChanged();
+                _settings.Save();
+            }
+        }
+    }
+    
+    public bool VariableIsHistoryEnabled
+    {
+        get => _settings.VariableImportTemplate.IsHistoryEnabled;
+        set
+        {
+            if (_settings.VariableImportTemplate.IsHistoryEnabled != value)
+            {
+                _settings.VariableImportTemplate.IsHistoryEnabled = value;
+                OnPropertyChanged();
+                _settings.Save();
+            }
+        }
+    }
+    
+    public double VariableHistoryDeadband
+    {
+        get => _settings.VariableImportTemplate.HistoryDeadband;
+        set
+        {
+            if (_settings.VariableImportTemplate.HistoryDeadband != value)
+            {
+                _settings.VariableImportTemplate.HistoryDeadband = value;
+                OnPropertyChanged();
+                _settings.Save();
+            }
+        }
+    }
+
+
 
     [RelayCommand]
     private async Task TestConnection()