Fixed sources of your own documents not reacting to a click

app/MindWork AI Studio/Tools/SourceGroup.cs

@@ -0,0 +1,8 @@
+namespace AIStudio.Tools;
+
+/// <summary>
+/// One group of a source list: a heading and the sources below it.
+/// </summary>
+/// <param name="Heading">The heading above the group.</param>
+/// <param name="Sources">The sources of the group, in the order they are shown.</param>
+public readonly record struct SourceGroup(string Heading, IReadOnlyList<NumberedSource> Sources);