Function resolveDownloadTarget

resolveDownloadTarget(
    opts: {
        file: FileEntry;
        getFileUrl: (file: FileEntry) => Promise<string | null>;
        handlers?: DownloadHandler[];
        onError?: (handlerName: string, error: unknown) => void;
        signal?: AbortSignal;
    },
): Promise<DownloadTarget | undefined>
Decide what to save for one file: a handler's conversion when one claims the file and succeeds, otherwise the stored file itself.

A handler that throws or declines never costs the user their download — the stored file is the fallback in both cases. onError reports the throw so a consumer can log it.
Parameters
- opts: {
      file: FileEntry;
      getFileUrl: (file: FileEntry) => Promise<string | null>;
      handlers?: DownloadHandler[];
      onError?: (handlerName: string, error: unknown) => void;
      signal?: AbortSignal;
  }
Returns Promise<DownloadTarget | undefined>
- Defined in file-manager/utils/downloadHandlers.ts:53