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/schedule/ScheduleSection.tsx

@@ -10,7 +10,7 @@ import {
 import { toast } from 'sonner';
 import { api, ApiError } from '../../lib/api';
 import type { ApiResponse } from '../../lib/api';
-import { formatNumber } from '../../lib/utils';
+import { formatNumber, digitsOnly } from '../../lib/utils';
 import Modal from '../ui/Modal';
 import ConfirmDialog from '../ui/ConfirmDialog';
 import GlobalSearchableSelect from '../ui/SearchableSelect';
@@ -455,15 +455,15 @@ function SessionEditor({ session, onChange, onRemove, addresses, serviceMode = f
           <div>
             <div style={{ fontSize: 12, color: 'var(--text-2)', marginBottom: 5 }}>هر (دقیقه کار)</div>
             <div className="field">
-              <input type="number" min={1} value={session.rest_interval}
-                onChange={e => upd('rest_interval', Number(e.target.value))} />
+              <input type="text" inputMode="numeric" dir="ltr" value={session.rest_interval}
+                onChange={e => upd('rest_interval', Number(digitsOnly(e.target.value)) || 0)} />
             </div>
           </div>
           <div>
             <div style={{ fontSize: 12, color: 'var(--text-2)', marginBottom: 5 }}>استراحت (دقیقه)</div>
             <div className="field">
-              <input type="number" min={1} value={session.time_to_rest}
-                onChange={e => upd('time_to_rest', Number(e.target.value))} />
+              <input type="text" inputMode="numeric" dir="ltr" value={session.time_to_rest}
+                onChange={e => upd('time_to_rest', Number(digitsOnly(e.target.value)) || 0)} />
             </div>
           </div>
         </div>
@@ -702,10 +702,11 @@ export function WeeklyScheduleTab({ doctorUuid, addresses, readOnly = false }: {
               <div className="flex flex-wrap items-center gap-2">
                 <span className="text-sm text-slate-600 dark:text-slate-400">فاصله بین نوبت‌ها</span>
                 <input
-                  type="number"
-                  min={0}
+                  type="text"
+                  inputMode="numeric"
+                  dir="ltr"
                   value={meta.buffer_minutes}
-                  onChange={(e) => setMeta(m => ({ ...m, buffer_minutes: Math.max(0, Number(e.target.value) || 0) }))}
+                  onChange={(e) => setMeta(m => ({ ...m, buffer_minutes: Math.max(0, Number(digitsOnly(e.target.value)) || 0) }))}
                   className="w-16 text-center text-sm rounded-lg border border-slate-200 dark:border-gray-700 bg-white dark:bg-gray-900 px-2 py-1.5 focus:outline-none focus:ring-0"
                 />
                 <span className="text-sm text-slate-600 dark:text-slate-400">دقیقه</span>
@@ -748,11 +749,12 @@ export function WeeklyScheduleTab({ doctorUuid, addresses, readOnly = false }: {
             <span className="text-sm text-slate-600 dark:text-slate-400">رزرو آنلاین تا</span>
             <div className="flex items-stretch gap-2">
               <input
-                type="number"
-                min={1}
+                type="text"
+                inputMode="numeric"
+                dir="ltr"
                 value={meta.booking_window_value}
                 disabled={!meta.online_booking_enabled}
-                onChange={(e) => setMeta(m => ({ ...m, booking_window_value: Math.max(1, Number(e.target.value) || 1) }))}
+                onChange={(e) => setMeta(m => ({ ...m, booking_window_value: Math.max(1, Number(digitsOnly(e.target.value)) || 1) }))}
                 className="w-14 text-center text-sm rounded-lg border border-slate-200 dark:border-gray-700 bg-white dark:bg-gray-900 focus:outline-none focus:ring-0 px-2 py-1.5"
               />
               <div style={{ width: 110 }}>