import { CanvasRetrieve } from '../../../../types/openapi';
/**
 * Decide whether an incoming `activeCanvas` prop update requires a deep state refresh
 * (re-cloning content.data, replacing sections, resetting canvas history) versus a
 * cheap top-level shallow merge.
 *
 * Returns true when the canvas identity, content (including overrides and home_page),
 * or sections have changed — i.e. anything that feeds the rendered slide tree. Returns
 * false when only top-level metadata/tags/flags have changed, in which case the existing
 * shallow merge in `updateActiveCanvasProperties` is safe (and preserves canvas-history
 * undo state).
 *
 * Fixes PIT-5927: stale slide content flashes before fresh fetch lands because
 * `canvasContent.value`/`sectionComponentOverrides.value`/`canvasHomePage.value` are only
 * re-derived by `setActiveCanvas`, not by `updateActiveCanvasProperties`.
 */
export declare const needsDeepRefresh: (prev: CanvasRetrieve | null, next: CanvasRetrieve) => boolean;