/**
 * WP1 — Slide parser. Deck source → Deck AST.
 *
 * Pure functions only (no DOM, no network). Implements DESIGN.md §4–§5:
 *   - split the source into slides at `<!-- slide … -->` markers,
 *   - parse a leading `<!-- deck … -->` block into DeckConfig,
 *   - expand a preset alias (or parse a raw row/col split grammar) into a
 *     fully-expanded LayoutNode tree (the layout engine never sees a preset
 *     name — the parser owns expansion, §5.4.1),
 *   - parse region bodies (`<!-- @name -->`), reserved regions
 *     (`@notes` / `@footer` / `@float`), per-slide options, the leading-h2
 *     title, and the heading lint rules (§5.2).
 */
import type { Deck } from './types.js';
export declare function parseDeck(source: string): Deck;