/**
 * Paste-from-Office cleanup. Word and Google Docs clipboard HTML carries
 * heavy proprietary markup — conditional comments, o:/w:/v: namespaced tags,
 * mso-* styles, and (in Word's case) lists faked as styled paragraphs. This
 * pre-pass normalizes that into plain HTML *before* the sanitizer runs, so
 * the schema receives real <ul>/<ol> structures instead of paragraph soup.
 */
/** Does this clipboard HTML come from Word, Outlook or Google Docs? */
export declare function isOfficeHtml(html: string): boolean;
/** Does this clipboard HTML come from Excel (or another spreadsheet)? */
export declare function isExcelHtml(html: string): boolean;
/** Normalizes Word/Google Docs clipboard HTML into plain semantic HTML. */
export declare function cleanOfficeHtml(html: string): string;