/**
 * 工具函数
 */
/**
 * 深度合并对象
 */
export declare function deepMerge(target: any, source: any): any;
/**
 * 生成唯一ID
 */
export declare function generateId(): string;
/**
 * 防抖函数
 */
export declare function debounce<T extends (...args: any[]) => any>(func: T, wait: number): (...args: Parameters<T>) => void;
/**
 * 节流函数
 */
export declare function throttle<T extends (...args: any[]) => any>(func: T, limit: number): (...args: Parameters<T>) => void;
/**
 * 格式化文件大小
 */
export declare function formatFileSize(bytes: number): string;
/**
 * 验证坐标是否有效
 */
export declare function isValidCoordinate(lon: number, lat: number): boolean;
/**
 * 计算两点间距离（米）
 */
export declare function calculateDistance(lon1: number, lat1: number, lon2: number, lat2: number): number;