import type { PageModel } from '../editor/store.js';
/**
 * Sibling states of one screen are a host declaration: pages that share a
 * scenario belong together (see `editor/screenStateGroups.ts`). The core never
 * infers membership from names, routes, or canvas proximity, so a screen
 * without a scenario simply has no siblings to flip to.
 */
export interface ScreenStateMember {
    page: PageModel;
    screenId: string;
    /** The declared state label; an undeclared state is the default one. */
    label: string;
    /** Host-declared kind of the state branch (overlay, badge, layout, …), presentation only. */
    kind?: string;
    current: boolean;
}
export interface ScreenStateGroup {
    /** The shared scenario declaration. */
    key: string;
    /** The default member's name, or the first declared member's. */
    name: string;
    members: readonly ScreenStateMember[];
}
export declare const isScreenPage: (page: PageModel) => boolean;
export declare const screenStateLabel: (page: PageModel) => string;
/**
 * The declared states of the screen `screenId` belongs to, default state first
 * and then in declaration order. Hidden siblings (other runtimes or conditions)
 * are left out; the current state always stays. Returns null when the screen
 * is unknown or declares no scenario.
 */
export declare function screenStateGroup(pages: readonly PageModel[], screenId: string, isVisible?: (page: PageModel) => boolean): ScreenStateGroup | null;