/**
 * Browser-based image download for wiki sync.
 *
 * When copying docs across wiki spaces, the API media download returns 403.
 * This module downloads images via Playwright browser session using Feishu's
 * internal CDN, which uses session cookies for auth.
 *
 * Browser state is cached for headless reuse across sessions.
 */
import type { ImageData } from "../wiki/block-copy.js";
export declare function closeBrowser(): Promise<void>;
/**
 * Pre-download all images from source blocks via browser session.
 * Returns an ImageCache map: { file_token → { bytes, width, height, align, scale } }
 */
export declare function prefetchImages(sourceBlocks: Record<string, unknown>[], sourceNodeToken: string, opts?: {
    verbose?: boolean;
    browserState?: string;
}): Promise<Map<string, ImageData>>;
//# sourceMappingURL=image-transfer.d.ts.map