/**
 * Draggable bubble utility.
 *
 * Attaches pointer-based drag behavior to a fixed-position bubble element.
 * Persists the drag offset in localStorage so the position survives page
 * navigations and transfers between the lightweight and full bubbles.
 */
interface DraggableOptions {
    /** Element that initiates the drag (defaults to the target element itself) */
    handle?: HTMLElement;
    /**
     * Fired after the element settles at a new position: initial restore
     * from localStorage, drag end, and viewport resize re-clamp. The chat
     * widget uses this to recompute the panel's opening direction so the
     * panel always extends into whichever side of the viewport has more
     * room (see `usePanelAnchor` in `ui/ChatRoot.tsx`).
     */
    onPositionChange?: () => void;
}
interface DragHandle {
    destroy: () => void;
}
/**
 * Make a fixed-position element draggable.
 *
 * @param el       The element to reposition via translate3d.
 * @param opts.handle             Optional drag handle element (e.g. bubble
 *                                inside a container). Pointer events listen
 *                                on the handle; transform applies to `el`.
 *                                Defaults to `el` itself.
 * @param opts.onPositionChange   Called after the element settles —
 *                                initial restore, drag end, and viewport
 *                                resize re-clamp. Used by the chat widget
 *                                to recompute the panel's opening
 *                                direction.
 *
 * - Restores persisted position from localStorage on attach.
 * - Persists position on drag end (and on resize when the clamp had to
 *   correct an out-of-bounds value, so the next page load is consistent).
 * - Distinguishes click from drag via a 5px movement threshold.
 *   When dragged, the subsequent `click` event on the handle is suppressed once.
 * - Re-clamps on viewport resize.
 */
export declare function makeDraggable(el: HTMLElement, opts?: DraggableOptions): DragHandle;
export {};