Added a way to see the complete system prompt of a chat (#1001)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/MindWork AI Studio/Chat/SystemPromptPart.cs

@@ -0,0 +1,26 @@
+using AIStudio.Tools.ToolCallingSystem;
+
+namespace AIStudio.Chat;
+
+/// <summary>
+/// One part of the system prompt, as it stands in the text sent to the provider.
+/// </summary>
+/// <remarks>
+/// Recorded by ChatThread.BuildSystemPrompt while it assembles the text, so that whoever shows the
+/// prompt learns where each paragraph came from from the one place which decided it, instead of
+/// working it out again.
+/// </remarks>
+/// <param name="Kind">Where the part comes from.</param>
+/// <param name="Text">The text of the part, exactly as it stands in the system prompt.</param>
+public sealed record SystemPromptPart(SystemPromptPartKind Kind, string Text)
+{
+    /// <summary>
+    /// The name of the chat template or the profile the part comes from; empty for every other part.
+    /// </summary>
+    public string SourceName { get; init; } = string.Empty;
+
+    /// <summary>
+    /// The tools whose usage policy the part states; empty for every other part.
+    /// </summary>
+    public IReadOnlyList<ToolDefinition> Tools { get; init; } = [];
+}