Added an optional notice for AI-generated content (#884)

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

app/MindWork AI Studio/Tools/PandocExport.cs

@@ -20,6 +20,8 @@ public static class PandocExport
     /// This says nothing to the user: it reports what happened and lets the caller decide. A batch
     /// run over hundreds of documents would otherwise bury the user under notifications. Pandoc
     /// must be available, which PandocAvailabilityService.EnsureAvailabilityAsync takes care of.
+    /// The text is converted as it is: whether it ends with the notice that AI generated it is up
+    /// to the caller, which knows what the text is.
     /// </remarks>
     /// <param name="rustService">The Rust service, used to build the Pandoc call.</param>
     /// <param name="markdownText">The Markdown text to convert.</param>
@@ -113,6 +115,9 @@ public static class PandocExport
     /// </summary>
     /// <param name="rustService">The Rust service, used for the save dialog and for Pandoc.</param>
     /// <param name="pandocAvailability">Makes sure Pandoc is there and offers its installation.</param>
+    /// <param name="disclosureService">Ends the text with the notice that AI generated it, when that is
+    /// switched on. Null for content which never gets the notice, such as the answer of the prompt
+    /// optimizer, which is meant for another model.</param>
     /// <param name="dialogTitle">The title of the save dialog. The caller knows what the user is
     /// looking at, a chat message or the result of an assistant, so the caller names it.</param>
     /// <param name="format">The format to write. Must be a format which uses Pandoc.</param>
@@ -120,7 +125,7 @@ public static class PandocExport
     /// <param name="fileName">What the document is about, used to suggest a name in the save dialog.
     /// Null falls back to a generic name.</param>
     /// <returns>True, when the document was written.</returns>
-    public static async Task<bool> ToDocument(RustService rustService, PandocAvailabilityService pandocAvailability, string dialogTitle, FileExportFormat format, IContent markdownContent, string? fileName = null)
+    public static async Task<bool> ToDocument(RustService rustService, PandocAvailabilityService pandocAvailability, AIGeneratedContentDisclosureService? disclosureService, string dialogTitle, FileExportFormat format, IContent markdownContent, string? fileName = null)
     {
         if (!format.UsesPandoc() || format.ToFileTypeFilter() is not { } fileTypeFilter)
             throw new ArgumentOutOfRangeException(nameof(format), format, "Pandoc cannot write this format.");
@@ -136,6 +141,8 @@ public static class PandocExport
             return false;
         }
 
+        markdownText = disclosureService?.AddDisclosureToMarkdown(markdownText) ?? markdownText;
+
         var response = await rustService.SaveFile(dialogTitle, [fileTypeFilter], format.ToSuggestedFileName(fileName));
         if (response.UserCancelled)
         {