Moved all extension methods into extension blocks (#1155)

app/MindWork AI Studio/Chat/ListFileAttachmentExtensions.cs

@@ -2,17 +2,20 @@ 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);
+    extension(List<FileAttachment> attachments)
+    {
+        public bool ContainsImages() => 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>
+        /// <returns>True when a document may be read.</returns>
+        public bool MayContainDocuments() => attachments.Any(attachment => !attachment.IsImage);
+    }
 }