/** The feedback flip every copy control shares. `copied` follows a real, awaited write. A rejection is
 *  reported as `failed`, not raised: the clipboard is denied on insecure origins and behind prompts, and
 *  an escaped rejection reached only the console. The timer clears on unmount, since a control can vanish
 *  mid-beat. `copied` and `failed` are never both true; a second press restarts the beat. */
export declare function useCopyFeedback(resetMs?: number): {
    copied: boolean;
    failed: boolean;
    run: (write: () => void | Promise<void>) => Promise<void>;
};