/**
 * @oxpulse/chat-widget — Shared floating-picker dismiss + focus-trap wiring.
 *
 * Deduplicated from EmojiPicker and ProductPicker (#203) — the two had
 * byte-identical ~60-line clones of the outside-pointerdown dismiss, the
 * Escape + Tab focus-trap (same `'input, button:not([disabled])'` selector
 * + shift-tab wrap), and the abort-signal wiring, alongside the
 * already-shared `computeFloatingPosition`. This single helper serves both.
 *
 * Behavior is identical to the inlined originals — every existing
 * emoji-picker AND product-picker test (dismiss / focus-trap / escape /
 * outside-click / abort) stays green.
 */
export interface FloatingDismissOptions {
    /** Called when an outside pointerdown / Escape / abort dismisses the picker. */
    onHide: () => void;
    /** Element to restore focus to on Escape (read at dismiss time, before
     *  onHide nulls the picker's internal reference). */
    getRestoreFocusEl: () => HTMLElement | null;
    /** Optional abort signal — when aborted, the picker is dismissed via onHide. */
    signal?: AbortSignal;
}
/**
 * Install outside-pointerdown dismiss + Escape/Tab focus-trap + abort
 * listener on a floating picker element anchored to `anchorEl`.
 *
 * @returns A teardown function that removes every installed listener —
 *          call it from the picker's hide/remove path.
 */
export declare function useFloatingDismiss(pickerEl: HTMLElement, anchorEl: HTMLElement, opts: FloatingDismissOptions): () => void;
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