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/components/paymentMethods/BankAccountFormModal.tsx

@@ -8,6 +8,7 @@ import {
   useUpdateBankAccount,
   type BankAccount,
 } from '../../hooks/usePaymentMethods';
+import { digitsOnly, toEnglishDigits } from '../../lib/utils';
 
 /**
  * فرم افزودن/ویرایش حساب بانکی — پورت مبدأ ModalAddBankAccount.jsx.
@@ -88,15 +89,15 @@ export default function BankAccountFormModal({
         </div>
         <div>
           <label className="field-label">شماره کارت</label>
-          <input className="input" value={cardNumber} onChange={(e) => setCardNumber(e.target.value)} placeholder="شماره کارت" />
+          <input className="input" type="tel" inputMode="numeric" dir="ltr" value={cardNumber} onChange={(e) => setCardNumber(digitsOnly(e.target.value, 16))} placeholder="شماره کارت" />
         </div>
         <div>
           <label className="field-label">شماره حساب</label>
-          <input className="input" value={accountNumber} onChange={(e) => setAccountNumber(e.target.value)} placeholder="شماره حساب" />
+          <input className="input" type="tel" inputMode="numeric" dir="ltr" value={accountNumber} onChange={(e) => setAccountNumber(digitsOnly(e.target.value))} placeholder="شماره حساب" />
         </div>
         <div>
           <label className="field-label">شبا</label>
-          <input className="input" value={shabaNumber} onChange={(e) => setShabaNumber(e.target.value)} placeholder="شبا" />
+          <input className="input" inputMode="numeric" dir="ltr" value={shabaNumber} onChange={(e) => setShabaNumber(toEnglishDigits(e.target.value).toUpperCase())} placeholder="شبا" />
         </div>
       </div>
     </Modal>