/**
 * Converts a markdown preview into the small HTML subset the inbox displays.
 *
 * Block structure is kept flat: a preview is one or two lines under a title, so list items and
 * quotes render as marked lines rather than as nested `<ul>`/`<blockquote>` boxes that would
 * fight the list item's layout.
 */
export declare function renderPreviewMarkdown(text: string): string;