import type { CodeViewScrollTarget } from "@pierre/diffs";import { useCallback, useEffect, useRef, useState } from "react"; interface FileRevealHandle {  getInstance(): object | undefined;  scrollTo(target: CodeViewScrollTarget): void;} // Wait for a mounted viewer and expanded rows, then apply each tree click once.// Keep scope stable until the diff or external file selection changes.export function useCodeViewFileReveal<TScope>(viewer: FileRevealHandle | null, scope: TScope) {  const [request, setRequest] = useState<{ fileKey: string; scope: TScope } | null>(null);  const handledRequest = useRef<typeof request>(null);   useEffect(() => {    if (request === null || handledRequest.current === request) return;    if (request.scope !== scope) {      handledRequest.current = request;      return;    }    if (!viewer?.getInstance()) return;     viewer.scrollTo({ type: "item", id: request.fileKey, align: "start" });    handledRequest.current = request;  }, [request, scope, viewer]);   return useCallback((fileKey: string) => setRequest({ fileKey, scope }), [scope]);}