export const toArray = (value: any): any[] => {
    if (Array.isArray(value)) return value;
    if (value === undefined || value === null) return [];
    return String(value).split(',').map(v => v.trim()).filter(Boolean);
};

export const toNumber = (value: any): number | undefined => {
    if (value === undefined || value === null || value === '') return undefined;
    const n = Number(value);
    return Number.isFinite(n) ? n : undefined;
};