feat: update async image view model

now accepting not path to image, but base64 encoded image data

GSS2.UI.Core/ViewModels/AsyncImageViewModel.cs

@@ -10,16 +10,16 @@ public partial class AsyncImageRecordViewModel : ViewModelBase
 {
     private static readonly SemaphoreSlim _semaphore = new(1, 1);
 
-    [ObservableProperty] public partial string Path { get; set; }
+    [ObservableProperty] public partial string? Data { get; set; }
     [ObservableProperty] public partial IImage? Image { get; set; }
-    [ObservableProperty] public partial bool IsLoading { get; set; } = true;
+    [ObservableProperty] public partial bool IsLoading { get; set; } = false;
 
-    public AsyncImageRecordViewModel(string path)
+    public AsyncImageRecordViewModel(string? data = null)
     {
-        Path = path;
+        Data = data;
     }
 
-    partial void OnPathChanged(string value) => _ = LoadAsync();
+    partial void OnDataChanged(string? value) => _ = LoadAsync();
 
     private async Task LoadAsync()
     {
@@ -27,17 +27,29 @@ public partial class AsyncImageRecordViewModel : ViewModelBase
 
         try
         {
-            var bitmap = await Task.Run(() => new Bitmap(Path));
-
-            await Dispatcher.UIThread.InvokeAsync(() =>
+            if (Data is not null)
             {
-                Image = bitmap;
-                IsLoading = false;
-            });
+                IsLoading = true;
+                byte[] imageBytes = Convert.FromBase64String(Data);
+                Bitmap bitmap;
+                using (var stream = new MemoryStream(imageBytes))
+                {
+                    bitmap = await Task.Run(() => new Bitmap(stream));
+                }
+
+                await Dispatcher.UIThread.InvokeAsync(() =>
+                {
+                    Image = bitmap;
+                    IsLoading = false;
+                });
+            }
+            else
+            {
+                Image = new WriteableBitmap(new Avalonia.PixelSize(1, 1), new Avalonia.Vector(96, 96), Avalonia.Platform.PixelFormat.Bgra8888, Avalonia.Platform.AlphaFormat.Premul);
+            }
         }
-        catch (Exception ex)
+        catch
         {
-            Console.Error.WriteLine($"Ошибка во время загрузки изображения:\n{ex.Message}\n{ex.StackTrace}");
             await Dispatcher.UIThread.InvokeAsync(() => IsLoading = false);
         }
         finally