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/PatientRecordInfoForm.tsx

@@ -8,6 +8,7 @@ import MobileInput from './ui/MobileInput';
 import SearchableSelect from './ui/SearchableSelect';
 import type { SelectOption } from './ui/SearchableSelect';
 import PersianDatePicker from './ui/PersianDatePicker';
+import { iranNationalCodeOptionalSchema, iranMobileOptionalSchema } from '../lib/utils';
 
 /**
  * اسکیمای فرم «اطلاعات پرونده». مطابق قواعد بک‌اند:
@@ -16,8 +17,8 @@ import PersianDatePicker from './ui/PersianDatePicker';
  */
 export const patientFormSchema = z.object({
   name: z.string().trim().min(1, 'نام و نام خانوادگی الزامی است'),
-  mobile: z.string().trim().regex(/^09\d{9}$/, 'شماره موبایل نامعتبر است').or(z.literal('')),
-  national_code: z.string().trim().regex(/^\d{10}$/, 'کد ملی باید ۱۰ رقم باشد').or(z.literal('')),
+  mobile: iranMobileOptionalSchema,
+  national_code: iranNationalCodeOptionalSchema,
   gender: z.string().nullable(),
   birth_date: z.string(),
   fathers_name: z.string(),
@@ -114,7 +115,7 @@ export default function PatientRecordInfoForm({
         {sel('gender', 'جنسیت', options.gender)}
 
         <Field label="کدملی" error={errors.national_code?.message}>
-          <Input {...register('national_code')} hasError={!!errors.national_code} dir="ltr" maxLength={10} placeholder="کد ملی" />
+          <Input {...register('national_code')} numeric hasError={!!errors.national_code} maxLength={10} placeholder="کد ملی" />
         </Field>
 
         <Field label="شماره تماس" error={errors.mobile?.message}>
@@ -181,7 +182,7 @@ export default function PatientRecordInfoForm({
         </Field>
 
         <Field label="کد پستی">
-          <Input {...register('postal_code')} dir="ltr" placeholder="کدپستی محل سکونت را وارد نمایید..." />
+          <Input {...register('postal_code')} numeric maxLength={10} placeholder="کدپستی محل سکونت را وارد نمایید..." />
         </Field>
 
         {sel('referral_source', 'نحوه آشنایی', options.referral)}