/**
 * @fileoverview Thumbnail card for a single attached file, showing an image preview or file-type icon.
 *
 * Renders a square preview tile with name/size for non-image files, or the image itself for image
 * attachments, overlaying upload status (spinner/error) and a hover-revealed remove button.
 */
import React from "react";
import { AttachedFile } from "../../types/research";
interface FilePreviewCardProps {
    file: AttachedFile;
    onRemove: (id: string) => void;
}
export declare const formatFileSize: (bytes: number) => string;
export declare const FilePreviewCard: React.FC<FilePreviewCardProps>;
export {};