Visual fixes

ViewModels/MainWindowViewModel.cs

@@ -4,6 +4,7 @@ using CommunityToolkit.Mvvm.Input;
 using CommunityToolkit.Mvvm.Messaging;
 using System.Collections.ObjectModel;
 using System.Threading.Tasks;
+using Avalonia.Controls;
 using GazpromApp.Models;
 
 namespace GazpromApp.ViewModels;
@@ -42,4 +43,11 @@ public partial class MainWindowViewModel : ViewModelBase
     
     [ObservableProperty]
     private bool _isLineVisible;
+
+    public MainWindowViewModel()
+    {
+        if (Design.IsDesignMode)
+            Points = [new PointViewModel(new Point()) { Name = "Name test", Description = "Description test" }];
+        else Points = [];
+    }
 }