/**
 * Normalizes HTML into a lowercase, punctuation-free, single-spaced token string
 * for search indexing/matching. From alerts' cleanHTML; builds on stripHtmlTags
 * so tag removal stays single-sourced.
 * @param {string} html - The HTML string to clean.
 * @returns {string} The cleaned, normalized text.
 */
export declare const cleanHTML: (html: string) => string;
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