feat(patients): prefill visit price from free-visit price

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

assets/admin/pages/NewSessionPage.tsx

@@ -1,4 +1,4 @@
-import { useMemo, useState } from 'react';
+import { useEffect, useMemo, useState } from 'react';
 import { useParams, useNavigate } from 'react-router-dom';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { useForm } from 'react-hook-form';
@@ -73,6 +73,16 @@ export default function NewSessionPage() {
   const { data: contractsData } = useQuery<{ data: { data: Contract[] } }>({
     queryKey: ['tenant-insurances'], queryFn: () => api.get('/api/v1/billing/tenant-insurances'),
   });
+  const { data: pricingData } = useQuery<{ data: { free_visit_price_rials: number } }>({
+    queryKey: ['insurance-pricing'], queryFn: () => api.get('/api/v1/insurance-pricing'),
+  });
+  const freeVisit = (pricingData as any)?.data?.free_visit_price_rials ?? 0;
+
+  useEffect(() => {
+    if (freeVisit > 0 && !form.getValues('visit_price_rials')) {
+      form.setValue('visit_price_rials', freeVisit);
+    }
+  }, [freeVisit]);
 
   const contracts = (contractsData as any)?.data?.data as Contract[] | undefined ?? [];
   const baseOpts = contracts.filter(c => c.insurance_kind === 'basic').map(c => ({ value: String(c.insurance_id), label: c.insurance_name ?? `#${c.insurance_id}` }));