Use BetterAdvancedImage to fix load stream errors

Also:
- fixes design time preview
- deletes cm-info file on file deletion

StabilityMatrix.Avalonia/DesignData/DesignData.cs

@@ -151,6 +151,8 @@ public static class DesignData
                     {
                         FilePath = "~/Models/Lora/electricity-light.safetensors",
                         Title = "Auroral Background",
+                        PreviewImagePath = "https://image.civitai.com/xG1nkqKTMzGDvpLrqFT7WA/" +
+                                           "78fd2a0a-42b6-42b0-9815-81cb11bb3d05/00009-2423234823.jpeg",
                         ConnectedModel = new ConnectedModelInfo
                         {
                             VersionName = "Lightning Auroral",
@@ -170,7 +172,7 @@ public static class DesignData
                         FilePath = "~/Models/Lora/model.safetensors",
                         Title = "Some model"
                     },
-                }
+                },
             },
             new(settingsManager, downloadService, modelFinder)
             {
@@ -186,6 +188,11 @@ public static class DesignData
                 }
             }
         };
+        
+        CheckpointsPageViewModel.CheckpointFolders[0].DisplayedCheckpointFiles =
+            CheckpointsPageViewModel.CheckpointFolders[0].CheckpointFiles;
+        CheckpointsPageViewModel.CheckpointFolders[1].DisplayedCheckpointFiles =
+            CheckpointsPageViewModel.CheckpointFolders[1].CheckpointFiles;
 
         CheckpointBrowserViewModel.ModelCards = new 
             ObservableCollection<CheckpointBrowserCardViewModel>

StabilityMatrix.Avalonia/ViewModels/CheckpointFile.cs

@@ -39,10 +39,12 @@ public partial class CheckpointFile : ViewModelBase
     /// </summary>
     [ObservableProperty]
     private string title = string.Empty;
-    
-    public string? PreviewImagePath { get; set; }
-    public Bitmap? PreviewImage { get; set; }
-    public bool IsPreviewImageLoaded => PreviewImage != null;
+
+    /// <summary>
+    /// Path to preview image. Can be local or remote URL.
+    /// </summary>
+    [ObservableProperty]
+    private string? previewImagePath;
 
     [ObservableProperty]
     private ConnectedModelInfo? connectedModel;
@@ -75,6 +77,18 @@ public partial class CheckpointFile : ViewModelBase
         }
     }
 
+    private string GetConnectedModelInfoFilePath()
+    {
+        if (string.IsNullOrEmpty(FilePath))
+        {
+            throw new InvalidOperationException(
+                "Cannot get connected model info file path when FilePath is empty");
+        }
+        var modelNameNoExt = Path.GetFileNameWithoutExtension(FilePath);
+        var modelDir = Path.GetDirectoryName(FilePath) ?? "";
+        return Path.Combine(modelDir, $"{modelNameNoExt}.cm-info.json");
+    }
+
     [RelayCommand]
     private async Task DeleteAsync()
     {
@@ -89,6 +103,14 @@ public partial class CheckpointFile : ViewModelBase
                 {
                     await Task.Run(() => File.Delete(PreviewImagePath));
                 }
+                if (ConnectedModel != null)
+                {
+                    var cmInfoPath = GetConnectedModelInfoFilePath();
+                    if (File.Exists(cmInfoPath))
+                    {
+                        await Task.Run(() => File.Delete(cmInfoPath));
+                    }
+                }
             }
             catch (IOException ex)
             {
@@ -169,16 +191,6 @@ public partial class CheckpointFile : ViewModelBase
         if (ConnectedModel?.ModelId == null) return;
         ProcessRunner.OpenUrl($"https://civitai.com/models/{ConnectedModel.ModelId}");
     }
-    
-    // Loads image from path
-    private async Task LoadPreviewImage()
-    {
-        if (PreviewImagePath == null) return;
-        await Dispatcher.UIThread.InvokeAsync(() =>
-        {
-            PreviewImage = new Bitmap(File.OpenRead(PreviewImagePath));
-        });
-    }
 
     /// <summary>
     /// Indexes directory and yields all checkpoint files.
@@ -226,7 +238,6 @@ public partial class CheckpointFile : ViewModelBase
             if (previewImage != null)
             {
                 checkpointFile.PreviewImagePath = files[previewImage];
-                checkpointFile.LoadPreviewImage().SafeFireAndForget();
             }
 
             yield return checkpointFile;

StabilityMatrix.Avalonia/ViewModels/CheckpointsPageViewModel.cs

@@ -67,12 +67,13 @@ public partial class CheckpointsPageViewModel : PageViewModelBase
     public override async Task OnLoadedAsync()
     {
         DisplayedCheckpointFolders = CheckpointFolders;
-        if (Design.IsDesignMode) return;
 
         // Set UI states
         IsImportAsConnected = settingsManager.Settings.IsImportAsConnected;
         SearchFilter = string.Empty;
-
+        
+        if (Design.IsDesignMode) return;
+        
         IsLoading = CheckpointFolders.Count == 0;
         IsIndexing = CheckpointFolders.Count > 0;
         await IndexFolders();

StabilityMatrix.Avalonia/Views/CheckpointsPage.axaml

@@ -101,9 +101,10 @@
                                                 TextWrapping="WrapWithOverflow"
                                                 IsVisible="{Binding IsConnectedModel}" />
                                             <!--  Image  -->
-                                            <Image
+                                            <controls:BetterAdvancedImage
                                                 Margin="0,0,0,4"
-                                                Source="{Binding PreviewImage}"
+                                                CornerRadius="4"
+                                                Source="{Binding PreviewImagePath}"
                                                 Stretch="Uniform"
                                                 IsVisible="{Binding IsConnectedModel}" />
                                         </StackPanel>