import type { File } from "expo-file-system"; let tempFileSequence = 0; /** * Replaces a file's contents through a sibling temp file and an overwriting * rename, so an interrupted write (app restart, process death) never leaves a * truncated document at the final path. Each write stages through its own * temp file so concurrent writers to the same destination cannot move or * clobber each other's staging file mid-flight. */export async function writeFileAtomically(file: File, contents: string): Promise<void> {  const { File: FileConstructor } = await import("expo-file-system");  tempFileSequence += 1;  const temp = new FileConstructor(file.parentDirectory, `${file.name}.${tempFileSequence}.tmp`);  temp.create({ intermediates: true, overwrite: true });  temp.write(contents);  temp.moveSync(file, { overwrite: true });}