feat(admin): normalize Persian/Arabic digits in every numeric field

Users typing on a Persian keyboard produced two distinct failures. Fields with
type="number" silently returned an empty string — the browser rejects Persian
digits, so the value was lost and saved as empty or zero. Text fields passed the
Persian characters straight through to the database, where a mobile stored as
۰۹۱۲… never matches 09… again. The secretary form hit the second case with no
validation at all.

Frontend:
- Adds digitsOnly() and the national-code schemas to lib/utils, plus lib/forms
  with numericField()/latinDigitsField() wrappers for React Hook Form fields.
- Converts every type="number" input to type="text" inputMode="numeric" with
  digit normalization; none remain. Fields that legitimately carry non-digits
  (sheba, landline) only get the digits translated, keeping IR and separators.
- Points the patient national-code and mobile schemas at the shared normalizing
  schemas, which accept Persian input instead of rejecting it.
- Drops two duplicate local digit converters in favour of the shared helper.

Backend:
- Adds NumericFieldNormalizerSubscriber, translating digits in whitelisted
  numeric keys of JSON request bodies under /api/v1/ before controllers run, so
  nobat724_front and clinic-pro-tauri are covered too. Translation only — no
  characters are stripped, non-string values and other keys are untouched.

Three component tests asserted on role="spinbutton" and numeric input values;
both are properties of type="number", so they were updated to match the new
text inputs.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

assets/admin/pages/RepresentationProfilePage.tsx

@@ -5,6 +5,7 @@ import { CheckBadgeIcon, TrashIcon, PlusIcon } from '@heroicons/react/24/outline
 import { api } from '../lib/api';
 import type { ApiResponse } from '../lib/api';
 import PersianDatePicker from '../components/ui/PersianDatePicker';
+import { toEnglishDigits, digitsOnly } from '../lib/utils';
 
 // تبدیل تاریخ میلادی ISO (YYYY-MM-DD) به شمسی Y/m/d برای استعلام api.ir
 function toJalali(iso: string): string {
@@ -17,13 +18,6 @@ function toJalali(iso: string): string {
   return y && m && d ? `${y}/${m}/${d}` : '';
 }
 
-// ارقام فارسی/عربی → لاتین (کیبورد انگلیسی؛ ورودی چسبانده‌شده هم نرمال شود)
-function toLatinDigits(s: string): string {
-  return s.replace(/[۰-۹٠-٩]/g, (d) =>
-    String('۰۱۲۳۴۵۶۷۸۹٠١٢٣٤٥٦٧٨٩'.indexOf(d) % 10),
-  );
-}
-
 // اعتبارسنجی کد ملی ایران (طول ۱۰ + رقم کنترلی)
 function isValidIranNationalCode(code: string): boolean {
   if (!/^\d{10}$/.test(code)) return false;
@@ -37,7 +31,7 @@ function isValidIranNationalCode(code: string): boolean {
 
 // اعتبارسنجی شبای ایران: IR + ۲۴ رقم + کنترل mod-97
 function isValidIranIban(raw: string): boolean {
-  const iban = toLatinDigits(raw).replace(/\s/g, '').toUpperCase();
+  const iban = toEnglishDigits(raw).replace(/\s/g, '').toUpperCase();
   if (!/^IR\d{24}$/.test(iban)) return false;
   const rearranged = iban.slice(4) + iban.slice(0, 4);
   const numeric = rearranged.replace(/[A-Z]/g, (c) => String(c.charCodeAt(0) - 55));
@@ -115,13 +109,13 @@ export default function RepresentationProfilePage() {
   });
 
   const submitNationalCode = () => {
-    const code = toLatinDigits(nationalCode).replace(/\D/g, '');
+    const code = digitsOnly(nationalCode);
     if (!isValidIranNationalCode(code)) { toast.error('کد ملی نامعتبر است'); return; }
     verifyMut.mutate(code);
   };
 
   const submitIban = () => {
-    const clean = toLatinDigits(iban).replace(/\s/g, '').toUpperCase();
+    const clean = toEnglishDigits(iban).replace(/\s/g, '').toUpperCase();
     if (!isValidIranIban(clean)) { toast.error('شماره شبا نامعتبر است (IR + ۲۴ رقم)'); return; }
     const jalali = toJalali(birthDate);
     if (!jalali) { toast.error('تاریخ تولد را انتخاب کنید'); return; }
@@ -157,7 +151,7 @@ export default function RepresentationProfilePage() {
             <input
               type="text" inputMode="numeric" dir="ltr" maxLength={10} value={nationalCode}
               placeholder="کد ملی ۱۰ رقمی"
-              onChange={(e) => setNationalCode(toLatinDigits(e.target.value).replace(/\D/g, ''))}
+              onChange={(e) => setNationalCode(digitsOnly(e.target.value, 10))}
               style={{ width: 220, height: 38, padding: '0 12px', borderRadius: 'var(--r-sm)', border: '1px solid var(--border)', background: 'var(--surface)', color: 'var(--text)', fontSize: 13.5, boxSizing: 'border-box', textAlign: 'center' }}
             />
             <button className="btn primary" onClick={submitNationalCode} disabled={verifyMut.isPending}>
@@ -210,7 +204,7 @@ export default function RepresentationProfilePage() {
             <input
               type="text" inputMode="numeric" dir="ltr" maxLength={26} value={iban}
               placeholder="IR000000000000000000000000"
-              onChange={(e) => setIban(toLatinDigits(e.target.value).toUpperCase().replace(/[^IR0-9]/g, ''))}
+              onChange={(e) => setIban(toEnglishDigits(e.target.value).toUpperCase().replace(/[^IR0-9]/g, ''))}
               style={{ width: 320, height: 38, padding: '0 12px', borderRadius: 'var(--r-sm)', border: '1px solid var(--border)', background: 'var(--surface)', color: 'var(--text)', fontSize: 13, boxSizing: 'border-box', fontFamily: 'monospace' }}
             />
             <PersianDatePicker