/**
 * Configuration for panel resizing and collapsing.
 *
 * - `collapseDirection` is always required — it determines which side the panel collapses to.
 * - Size constraints (`initialWidth`, `minWidth`, `maxWidth`) are all optional:
 *   - If none are set, the panel width is determined by its content.
 *   - If only `initialWidth` is set, the panel gets a fixed width with no drag resizing.
 *   - For drag resizing to work, at least 2 of the 3 size values must be provided so the resizer
 *     has a range to operate in.
 *   - When `minWidth` is omitted, `initialWidth` acts as the lower bound.
 *   - When `maxWidth` is omitted, `initialWidth` acts as the upper bound.
 */
export type PanelResizingSettings = {
    collapseDirection: 'left' | 'right';
    initialWidth?: number;
    minWidth?: number;
    maxWidth?: number;
};
export type PanelBorder = 'top' | 'right' | 'bottom' | 'left';
/**
 * Config for one `PageLayout` header chrome button. Set `active` only for toggles — it drives both
 * `aria-pressed` and the pressed background, and is omitted entirely for plain action buttons.
 */
export type PageLayoutAction = {
    active?: boolean;
    onClick: () => void;
};
/** Editor chrome — a fixed pair, so an editor never ships half of it. */
export type EditorControls = {
    panelsToggle: PageLayoutAction;
    close: PageLayoutAction;
};