/**
 * Shared UI factory helpers.
 */
import type { App } from '../../App';
import type { Group } from '../../shapes/Group';
/** Live canvas UI palette (synced from app theme). */
export declare function UI(): import("../resolveCanvasTheme").UiCanvasTheme;
export declare function createGroup(app: App, type: string, props: Record<string, unknown>, extra?: Record<string, unknown>): Group;
/** Shared canvas surface chrome — consistent radius, border, shadow across UI components */
export declare function canvasSurface(app: App, width: number, height: number, opts?: {
    radius?: number;
    elevated?: boolean;
}): import("../..").RoundedRect;