added warning and improved error handling

app/MindWork AI Studio/Components/ChatComponent.razor.cs

@@ -81,7 +81,6 @@ public partial class ChatComponent : MSGComponentBase, IAsyncDisposable
     private Guid loadedParameterWorkspaceId = Guid.Empty;
     private Guid foregroundChatId = Guid.Empty;
     private int workspaceHeaderSyncVersion;
-    private CancellationTokenSource? cancellationTokenSource;
     private HashSet<FileAttachment> chatDocumentPaths = [];
     private string tokenCount = "0";
     private string TokenCountMessage => $"{this.T("Estimated amount of tokens:")} {this.tokenCount}";

app/MindWork AI Studio/Components/DataSourceCloudEmbeddingWarning.razor

@@ -0,0 +1,9 @@
+@inherits MSGComponentBase
+
+<MudAlert Severity="Severity.Warning" Variant="Variant.Outlined" Dense="@true" Class="mb-3">
+    <MudText Typo="Typo.body2">
+        @this.WarningText
+    </MudText>
+</MudAlert>
+
+<MudTextSwitch Value="@this.UserAcknowledged" ValueChanged="@this.UserAcknowledgedChanged" Label="@T("I confirm that I have read and understood the above")" LabelOn="@T("Yes, please send my data to the external embedding provider")" LabelOff="@T("No, I will choose another embedding")" Validation="@this.Validation"/>

app/MindWork AI Studio/Components/DataSourceCloudEmbeddingWarning.razor.cs

@@ -0,0 +1,52 @@
+using AIStudio.Settings.DataModel;
+
+using Microsoft.AspNetCore.Components;
+
+namespace AIStudio.Components;
+
+public partial class DataSourceCloudEmbeddingWarning : MSGComponentBase
+{
+    [Parameter]
+    public DataSourceType DataSourceType { get; set; }
+
+    [Parameter]
+    public string SourcePath { get; set; } = string.Empty;
+
+    [Parameter]
+    public bool UserAcknowledged { get; set; }
+
+    [Parameter]
+    public EventCallback<bool> UserAcknowledgedChanged { get; set; }
+
+    [Parameter]
+    public Func<bool, string?> Validation { get; set; } = _ => null;
+
+    private string WarningText
+    {
+        get
+        {
+            var subject = this.GetSubjectText();
+            return string.Format(
+                T("Warning: The selected embedding provider is not self-hosted. Creating embeddings can cost money and may need to run multiple times, for example after errors or file changes. {0} will be sent to an external third party. MindWork AI Studio has no control over what that third party does with the data after it is sent."),
+                subject);
+        }
+    }
+
+    private string GetSubjectText()
+    {
+        if (string.IsNullOrWhiteSpace(this.SourcePath))
+            return this.DataSourceType switch
+            {
+                DataSourceType.LOCAL_DIRECTORY => T("All files in this folder and its subfolders"),
+                DataSourceType.LOCAL_FILE => T("The selected file"),
+                _ => T("The selected data")
+            };
+
+        return this.DataSourceType switch
+        {
+            DataSourceType.LOCAL_DIRECTORY => string.Format(T("All files in the folder '{0}' and its subfolders"), this.SourcePath),
+            DataSourceType.LOCAL_FILE => string.Format(T("The file '{0}'"), this.SourcePath),
+            _ => string.Format(T("The data source '{0}'"), this.SourcePath)
+        };
+    }
+}