Add Persian date input and refine admin category/check screens.

Introduce shared PersianDateInput with jalali utilities and align categories and check management views with updated form patterns.

src/utils/jalali.ts

@@ -0,0 +1,110 @@
+import { jalaaliMonthLength, toGregorian, toJalaali } from 'jalaali-js'
+
+const persianDigits = '۰۱۲۳۴۵۶۷۸۹'
+
+function toPersianDigits(input: string): string {
+  return input.replace(/\d/g, (d) => persianDigits[Number(d)]!)
+}
+
+export const JALALI_MONTH_NAMES = [
+  'فروردین',
+  'اردیبهشت',
+  'خرداد',
+  'تیر',
+  'مرداد',
+  'شهریور',
+  'مهر',
+  'آبان',
+  'آذر',
+  'دی',
+  'بهمن',
+  'اسفند',
+] as const
+
+export const JALALI_WEEKDAY_NAMES = ['ش', 'ی', 'د', 'س', 'چ', 'پ', 'ج'] as const
+
+export interface JalaliDate {
+  jy: number
+  jm: number
+  jd: number
+}
+
+export function parseISODate(iso: string): Date {
+  const match = iso.trim().match(/^(\d{4})-(\d{2})-(\d{2})/)
+  if (match) {
+    return new Date(Number(match[1]), Number(match[2]) - 1, Number(match[3]))
+  }
+
+  const parsed = new Date(iso)
+  if (Number.isNaN(parsed.getTime())) {
+    return new Date(NaN)
+  }
+
+  return new Date(parsed.getFullYear(), parsed.getMonth(), parsed.getDate())
+}
+
+export function toISODate(date: Date): string {
+  const year = date.getFullYear()
+  const month = String(date.getMonth() + 1).padStart(2, '0')
+  const day = String(date.getDate()).padStart(2, '0')
+  return `${year}-${month}-${day}`
+}
+
+export function toJalali(date: Date): JalaliDate {
+  const { jy, jm, jd } = toJalaali(date.getFullYear(), date.getMonth() + 1, date.getDate())
+  return { jy, jm, jd }
+}
+
+export function fromJalali(jy: number, jm: number, jd: number): Date {
+  const { gy, gm, gd } = toGregorian(jy, jm, jd)
+  return new Date(gy, gm - 1, gd)
+}
+
+export function isoToJalali(iso: string): JalaliDate | null {
+  if (!iso) return null
+  return toJalali(parseISODate(iso))
+}
+
+export function jalaliToISO(jy: number, jm: number, jd: number): string {
+  return toISODate(fromJalali(jy, jm, jd))
+}
+
+export function formatJalaliDate(jy: number, jm: number, jd: number): string {
+  const month = String(jm).padStart(2, '0')
+  const day = String(jd).padStart(2, '0')
+  return toPersianDigits(`${jy}/${month}/${day}`)
+}
+
+export function formatJalaliLabel(jy: number, jm: number, jd: number): string {
+  return `${toPersianDigits(String(jd))} ${JALALI_MONTH_NAMES[jm - 1]} ${toPersianDigits(String(jy))}`
+}
+
+export function getPersianWeekday(jy: number, jm: number, jd: number): number {
+  const { gy, gm, gd } = toGregorian(jy, jm, jd)
+  const jsDay = new Date(gy, gm - 1, gd).getDay()
+  return (jsDay + 1) % 7
+}
+
+export function getMonthLength(jy: number, jm: number): number {
+  return jalaaliMonthLength(jy, jm)
+}
+
+export function buildCalendarDays(jy: number, jm: number): Array<number | null> {
+  const length = getMonthLength(jy, jm)
+  const startWeekday = getPersianWeekday(jy, jm, 1)
+  const cells: Array<number | null> = Array.from({ length: startWeekday }, () => null)
+
+  for (let day = 1; day <= length; day += 1) {
+    cells.push(day)
+  }
+
+  while (cells.length % 7 !== 0) {
+    cells.push(null)
+  }
+
+  return cells
+}
+
+export function todayJalali(): JalaliDate {
+  return toJalali(new Date())
+}