import type { ChatMessage } from '../../types/ChatMessage';
import type { ChatParticipant } from '../../types/ChatParticipant';
/**
 * Builds a polished PDF representation of the provided chat.
 *
 * @param title - Title used in the PDF heading and metadata.
 * @param messages - Messages that should be included in the PDF export.
 * @param participants - Optional participant metadata to resolve sender names.
 * @returns Binary data for the generated PDF file.
 *
 * @private Internal helper used by `pdfSaveFormatDefinition`.
 */
export declare function buildChatPdf(title: string, messages: ReadonlyArray<ChatMessage>, participants?: ReadonlyArray<ChatParticipant>): Uint8Array;