/**
 * 表单变更检查器
 * 用于手动检查表单对象是否发生实际变更
 */
export declare function useFormChangeWatcher<T extends Record<string, any>>(): {
    setInitialSnapshot: (formData: T) => void;
    checkFormChange: (newFormData?: T | null) => boolean;
    getInitialSnapshot: () => T | null;
    getFormDiff: (newFormData?: T | null) => Record<string, {
        old: any;
        new: any;
    }> | null;
};