/**
 * Shared TUI extension surface state (header/footer widgets, status slots).
 */
export declare class TuiExtensionSurface {
    readonly headerWidgets: Map<string, string[]>;
    readonly footerWidgets: Map<string, string[]>;
    readonly statusSlots: Map<string, string>;
    getHeaderLines(): string[];
    getFooterLines(): string[];
    getStatusParts(): string[];
}
