/**
 * Purpose: Provides shared popup UI helper utilities for formatting and browser-page eligibility checks.
 * Why: Avoids duplicated UI utility logic across popup modules and keeps display behavior consistent.
 * Docs: docs/features/feature/browser-extension-enhancement/index.md
 */
/**
 * @fileoverview Popup UI Utilities
 * Helper functions for UI updates
 */
/**
 * Format bytes into human-readable file size
 */
export declare function formatFileSize(bytes: number): string;
export { isInternalUrl } from '../lib/internal-url.js';
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