Fixed prompt injection warnings waiting for other actions to finish (#1053)

app/MindWork AI Studio/Chat/ListFileAttachmentExtensions.cs

@@ -3,4 +3,16 @@ namespace AIStudio.Chat;
 public static class ListFileAttachmentExtensions
 {
     public static bool ContainsImages(this List<FileAttachment> attachments) => attachments.Any(attachment => attachment.IsImage);
+
+    /// <summary>
+    /// Whether preparing the message for the AI may read a document through the runtime.
+    /// </summary>
+    /// <remarks>
+    /// Every attachment but a picture counts: its type is checked again with the latest rules
+    /// before it is read, cf. FileAttachment.Normalize, and may turn out to be a document then.
+    /// Checking that here would touch every file twice, which takes long on a network drive.
+    /// </remarks>
+    /// <param name="attachments">The attachments of the message.</param>
+    /// <returns>True when a document may be read.</returns>
+    public static bool MayContainDocuments(this List<FileAttachment> attachments) => attachments.Any(attachment => !attachment.IsImage);
 }