export function formatDateOnly(date: Date) { const pad = (n: number) => String(n).padStart(2, '0') return `${date.getFullYear()}-${pad(date.getMonth() + 1)}-${pad(date.getDate())}` } export function formatDateTimeLocal(date: Date) { const pad = (n: number) => String(n).padStart(2, '0') return `${formatDateOnly(date)}T${pad(date.getHours())}:${pad(date.getMinutes())}` }