import { Span } from '../types';
/**
 * Constructs an absolute URL for a resource image span.
 *
 * This is needed because span.description often contains relative paths (e.g., "/assets/image.png")
 * which work in browsers but fail in Electron apps running on different ports.
 *
 * @param span - The span object containing resource information
 * @returns Absolute URL string if it can be constructed, null otherwise
 */
export declare function getResourceImageUrl(span: Span): string | null;