/**
 * Telegram 处理器工具函数
 *
 * 从 telegram.ts 提取的模块级纯函数。
 */
import type { PermissionDecision } from './telegram-types.js';
export declare function extractExtension(name: string): string;
export declare function mimeFromExtension(ext: string): string;
export declare function sanitizeFilename(name: string): string;
export declare function parsePermissionDecision(raw: string): PermissionDecision | null;
//# sourceMappingURL=telegram-utils.d.ts.map