/**
 * Auto-layout pass for ContainerElement. Walks a slide's elements list,
 * finds the container by id, and rewrites the position (and optionally
 * size, when align=stretch) of every child id listed in childIds.
 *
 * This is the same algorithm the editor uses; running it in the presenter
 * keeps embedded JSONs visually identical to what the user authored, and
 * gives us a single source of truth for layout math.
 */
import type { CanvasElement } from '../types';
export declare function relayoutContainer(elements: CanvasElement[], containerId: string): CanvasElement[];
export declare function relayoutAllContainers(elements: CanvasElement[]): CanvasElement[];