/**
 * The feedback flip every copy control shares: after a write SETTLES the control
 * reports what happened for a beat, then returns to rest.
 *
 * Three rules live here rather than in each control. The confirmation follows a
 * REAL write — `run` awaits, and a rejected write never sets `copied`, so a
 * control never confirms a copy that did not happen. A rejected write is
 * REPORTED rather than raised: the clipboard is denied on a non-secure origin
 * and behind a permission prompt, both of them a press away, and a control that
 * let that rejection escape put "Clipboard: Write permission denied" in the
 * console and nothing at all in front of the reader — so the outcome becomes
 * `failed`, which the control says in the reader's own words. And the timer is
 * cleared on unmount, so a control that disappears mid-beat (a row scrolled out
 * of a register, a message bar that loses its actions) never sets state on an
 * unmounted tree.
 *
 * `copied` and `failed` are the two sides of ONE outcome and are never both
 * true: a second press while a beat is running restarts it on the new answer.
 */
export declare function useCopyFeedback(resetMs?: number): {
    copied: boolean;
    failed: boolean;
    run: (write: () => void | Promise<void>) => Promise<void>;
};