/**
 * Sanitize HTML content to prevent XSS attacks.
 * Uses DOMPurify with a safe default configuration.
 */
export declare function sanitizeHtml(html: string): string;
/**
 * Sanitize HTML for WYSIWYG editor output.
 * More permissive than sanitizeHtml, but still safe.
 */
export declare function sanitizeWysiwygHtml(html: string): string;
/**
 * Strip all HTML tags, returning plain text.
 * Useful for text-only contexts.
 */
export declare function stripHtml(html: string): string;
