interface UseToolApprovalReturn {
    pending: ToolApprovalRequest[];
    approve: (toolCallId: string) => Promise<void>;
    reject: (toolCallId: string, reason?: string) => Promise<void>;
    approveAll: () => Promise<void>;
    rejectAll: (reason?: string) => Promise<void>;
    isSubmitting: boolean;
    error: Error | null;
    clearError: () => void;
}