/**
 * Gmail body format helpers.
 *
 * sanitizeEmailHtml — strips dangerous HTML from email bodies while preserving
 * visual structure (layout, inline styles, tables, images) needed for correct
 * rendering. Used for --format=sane-html.
 */
/**
 * Sanitize an HTML email body for safe rendering/storage.
 *
 * What is stripped:
 *   - <script>, <iframe>, <object>, <embed>, <form>, <input>, <button>
 *   - All event handler attributes (onclick, onload, onerror, …)
 *   - javascript: and data: URIs in href/src
 *   - <meta> and <link> tags (no external resource loading)
 *
 * What is kept:
 *   - All structural and formatting tags (div, p, table, span, …)
 *   - style attributes (needed for email layout — not executable)
 *   - class, id, align, width, height, bgcolor (common email layout attrs)
 *   - <a href> with http/https/mailto schemes only
 *   - <img src> with http/https/cid schemes (cid: for inline attachments)
 *   - Tables with colspan/rowspan/border/cellpadding
 *   - Legacy <font> and <center> tags (common in older email templates)
 */
export declare function sanitizeEmailHtml(html: string): string;
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