/**
 * Local-panel defaults in pixels, used only when no explicit preference exists.
 * Keep the existing desktop width until chat layout rolls out. Compact sizing is independent.
 * These are requested defaults, not measurements of an open panel.
 */
export declare function getPanelLayoutDefaults(): {
    panelWidth: number;
    compactPanelWidth: number;
    panelMinWidth: number;
};