feat(doctors): add activity start date field with Persian calendar in admin panel

assets/admin/pages/DoctorFormPage.tsx

@@ -14,6 +14,7 @@ import { api } from '../lib/api';
 import type { ApiResponse } from '../lib/api';
 import SearchableSelect from '../components/ui/SearchableSelect';
 import MobileInput from '../components/ui/MobileInput';
+import PersianDatePicker from '../components/ui/PersianDatePicker';
 import { iranMobileSchema } from '../lib/utils';
 import { useAuthStore } from '../stores/authStore';
 
@@ -261,6 +262,7 @@ export default function DoctorFormPage() {
     primaryRole === 'representation' ? '/api/v1/representation/doctor' : '/api/v1/admin/doctors';
   const [selectedSpecialties, setSelectedSpecialties] = useState<number[]>([]);
   const [gender, setGender] = useState<'man' | 'woman' | ''>('');
+  const [activityDate, setActivityDate] = useState('');
 
   const specialtiesQ = useQuery({
     queryKey: ['specialties-list'],
@@ -286,6 +288,9 @@ export default function DoctorFormPage() {
         degree:              values.degree || undefined,
         medical_system_code: values.medical_system_code || undefined,
         info:                values.info || undefined,
+        ...(activityDate
+          ? { activity_time: Math.floor(new Date(`${activityDate}T12:00:00`).getTime() / 1000) }
+          : {}),
         specialties:         selectedSpecialties,
       }),
     onSuccess: (res) => {
@@ -369,6 +374,18 @@ export default function DoctorFormPage() {
               </Field>
             </div>
 
+            <div style={{ marginTop: 14 }}>
+              <Field label="تاریخ شروع فعالیت">
+                <PersianDatePicker
+                  value={activityDate}
+                  onChange={setActivityDate}
+                  placeholder="انتخاب تاریخ"
+                  enableYearPicker
+                  minWidth={200}
+                />
+              </Field>
+            </div>
+
             <div style={{ marginTop: 14 }}>
               <Field label="بیوگرافی">
                 <textarea rows={3} className="cp-textarea" placeholder="معرفی کوتاهی از پزشک..." {...register('info')} style={{ resize: 'none' }} />