export declare function escapeHtml(str: string): string;
export declare function formatDate(date: string | Date): string;
export declare function extractFilename(component: string): string;
export declare function calculateMetrics<T extends Record<string, any>>(items: T[], keyExtractors: Record<string, (item: T) => string>): Record<string, Record<string, number>>;
export declare function createProgressBar(current: number, total: number, width?: number): string;
export declare function delay(ms: number): Promise<void>;
export declare function validateUrl(url: string): boolean;
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