refactor:完成变量表的重构添加，删除，更新

DMS.WPF/Services/ViewService/VariableViewService.cs

@@ -84,7 +84,7 @@ public class VariableViewService : IVariableViewService
         }
 
         var variableTable = _mapper.Map<VariableTable>(variableTableItem);
-        if (await _appCenterService.VariableTableManagementService.UpdateVariableTableAsync(variableTable) > 0)
+        if (await _appCenterService.VariableTableManagementService.UpdateAsync(variableTable) > 0)
         {
             // 更新数据库后会自动更新内存，无需额外操作
             return true;
@@ -93,35 +93,6 @@ public class VariableViewService : IVariableViewService
         return false;
     }
 
-    /// <summary>
-    /// 删除变量表。
-    /// </summary>
-    public async Task<bool> DeleteVariableTable(VariableTableItem variableTable, bool isDeleteDb = false)
-    {
-        if (variableTable == null)
-        {
-            return false;
-        }
-
-        if (isDeleteDb)
-        {
-            if (!await _appCenterService.VariableTableManagementService.DeleteVariableTableAsync(variableTable.Id))
-            {
-                return false;
-            }
-        }
-
-        // 删除与当前变量表关联的所有变量
-        foreach (var variable in variableTable.Variables)
-        {
-            _viewDataService.Variables.Remove(variable.Id);
-        }
-
-        // 删除变量表
-        _viewDataService.VariableTables.Remove(variableTable.Id);
-        variableTable.Device.VariableTables.Remove(variableTable);
-        return true;
-    }
 
     /// <summary>
     /// 添加变量。