import { RefObject } from 'react';
/**
 * Escape closes a dropdown inside the assistant panel — and closes ONLY it.
 *
 * ★★★ WHY CAPTURE. Both dropdowns used to listen on `window` in the bubble
 * phase. `window` is the LAST node an event reaches, so the panel's own
 * shortcut hook — on `document`, also bubbling — always ran first, saw focus
 * inside the panel, found no full-surface overlay open, and closed the WHOLE
 * assistant. One press dismissed a dropdown and destroyed the streaming turn,
 * the draft and the attachments; this handler then ran on an unmounted
 * component. Capture on `document` reaches this node ahead of every bubble
 * listener on it, whatever order they registered in — the only placement that
 * reliably wins.
 *
 * ★★★ WHY IT IS STILL SCOPED TO FOCUS. Consuming Escape unconditionally while
 * open is the same mistake pointing the other way: the dropdown stays mounted
 * when focus leaves it without a click (open it from the keyboard, Tab to the
 * transcript toggle, press Enter), and it would then swallow an Escape meant
 * for the layer the user actually opened last, closing a menu they cannot even
 * see. So the key is taken only while focus is still inside the menu or on its
 * trigger — the same containment question `focusIsInsidePanel` answers for the
 * panel, and the same one this component's outside-click handler already asks.
 *
 * ★ `stopPropagation`, NOT `stopImmediatePropagation`: stopping in the capture
 * phase already prevents every bubble listener from seeing the key. The
 * immediate variant would additionally kill unrelated capture listeners on
 * `document`, which are none of a dropdown's business.
 *
 * Shared by `AssistantMoreMenu` and `AssistantAttachmentButton` so the rule
 * lives in one place — the two copies had drifted into being identical
 * comment-for-comment, which is a third copy waiting to happen.
 */
export declare function useDropdownEscape(open: boolean, menuRef: RefObject<HTMLElement | null>, buttonRef: RefObject<HTMLElement | null>, close: () => void): void;
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