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/PatientRecordFormPage.tsx

@@ -11,6 +11,8 @@ import type { ApiResponse } from '../lib/api';
 import type { PatientRecord } from '../types';
 import PersianDateInput from '../components/ui/PersianDateInput';
 import SearchableSelect from '../components/ui/SearchableSelect';
+import { numericField } from '../lib/forms';
+import { iranNationalCodeSchema, iranMobileSchema } from '../lib/utils';
 
 const REFERRAL_OPTIONS = ['اینستاگرام', 'معرفی دوستان و آشنایان', 'جستجوی اینترنتی', 'تابلو مطب', 'سایر'];
 
@@ -18,8 +20,8 @@ const schema = z.object({
   name:            z.string().min(1, 'نام و نام خانوادگی الزامی است'),
   record_number:   z.string().min(1, 'شماره پرونده الزامی است'),
   gender:          z.enum(['male', 'female'], { errorMap: () => ({ message: 'جنسیت را انتخاب کنید' }) }),
-  national_code:   z.string().regex(/^\d{10}$/, 'کد ملی باید ۱۰ رقم باشد'),
-  mobile:          z.string().regex(/^09\d{9}$/, 'شماره تماس نامعتبر است'),
+  national_code:   iranNationalCodeSchema,
+  mobile:          iranMobileSchema,
   birth_date:      z.string().optional(),
   referral_source: z.string().optional(),
   description:     z.string().optional(),
@@ -126,10 +128,10 @@ export default function PatientRecordFormPage() {
             />
           </Field>
           <Field label="کد ملی" required error={form.formState.errors.national_code?.message}>
-            <div className="field"><input {...form.register('national_code')} inputMode="numeric" placeholder="کد ملی را وارد نمایید" /></div>
+            <div className="field"><input {...numericField(form.register('national_code'), 10)} placeholder="کد ملی را وارد نمایید" /></div>
           </Field>
           <Field label="شماره تماس" required error={form.formState.errors.mobile?.message}>
-            <div className="field"><input {...form.register('mobile')} inputMode="numeric" placeholder="شماره تماس را وارد نمایید" /></div>
+            <div className="field"><input {...numericField(form.register('mobile'), 11)} placeholder="شماره تماس را وارد نمایید" /></div>
           </Field>
           <Field label="تاریخ تولد">
             <PersianDateInput value={form.watch('birth_date') ?? ''} onChange={(v) => form.setValue('birth_date', v)} enableYearPicker />