Merge reply-chain documents into AI requests

src/common/attachment-visibility.ts

@@ -3,3 +3,7 @@ import type {StoredAttachment} from "../model/stored-attachment";
 export function filterUserVisibleStoredAttachments(attachments: StoredAttachment[]): StoredAttachment[] {
     return attachments.filter(attachment => attachment.scope !== "internal_artifact");
 }
+
+export function filterUserInputStoredAttachments(attachments: StoredAttachment[]): StoredAttachment[] {
+    return attachments.filter(attachment => attachment.scope === "user_input" || attachment.scope === undefined);
+}