Integrate data sources per chat thread & store them with the chat

app/MindWork AI Studio/Chat/ChatThread.cs

@@ -1,4 +1,5 @@
 using AIStudio.Settings;
+using AIStudio.Settings.DataModel;
 
 namespace AIStudio.Chat;
 
@@ -27,6 +28,16 @@ public sealed record ChatThread
     /// </summary>
     public string SelectedProfile { get; set; } = string.Empty;
 
+    /// <summary>
+    /// Is this chat thread using data sources?
+    /// </summary>
+    public bool UseDataSources { get; set; }
+
+    /// <summary>
+    /// The data source options for this chat thread.
+    /// </summary>
+    public DataSourceOptions DataSourceOptions { get; set; } = new();
+
     /// <summary>
     /// The name of the chat thread. Usually generated by an AI model or manually edited by the user.
     /// </summary>