/**
 * Hook to check if the terminal has focus.
 *
 * Uses DECSET 1004 focus reporting - the terminal sends escape sequences
 * when it gains or loses focus. These are handled automatically
 * by Ink and filtered from useInput.
 *
 * @returns true if the terminal is focused (or focus state is unknown)
 */
export declare function useTerminalFocus(): boolean;
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