/**
 * The route that boots a screen preview.
 *
 * `route` remains the product's canonical address for inventory, coverage, and
 * source identity. A host may expose a development-only routed entry that
 * prepares authentication or fixture state before rendering the same screen;
 * `previewRoute` names that entry without relabelling the product screen.
 */
export declare function resolvePreviewRoute(page: {
    route?: string | null;
    previewRoute?: string | null;
}): string | null;