fix(session): show and keep the doctor's insurance when editing an encounter

The encounter edit form asked for contracts in the panel's own environment, so
inside a clinic it got an empty list: no insurance to choose, and the one
already recorded on the encounter had no matching option to display. It now
scopes the request by the encounter's doctor, the same way the confirm modal
does, which is why the session payload's existing doctor_uuid is threaded
through.

Saving the form had the matching defect on the server. Recalculating the totals
looked up the coverage percentage against the record's tenant rather than the
contract's, so a single save on a correctly-billed encounter zeroed the
insurance share and moved the whole amount back onto the patient.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

assets/admin/components/session/CreateStep.tsx

@@ -105,11 +105,20 @@ export default function CreateStep({ recordUuid, profile, onCreated, onCancel, e
   const { data: packagesData } = useQuery<ApiResponse<PackageRow[]>>({
     queryKey: ['inventory-packages'], queryFn: () => api.get('/api/v1/inventory-packages'),
   });
+  // مراجعهٔ برخاسته از نوبت، قراردادِ پزشکِ همان نوبت را دارد نه قراردادِ محیط پنل:
+  // در کلینیک، قرارداد روی خودِ پزشک ثبت می‌شود و بدون این محدوده، فهرست بیمه‌ها
+  // خالی می‌آمد و بیمهٔ ثبت‌شدهٔ همان مراجعه هم در فرم پیدا نمی‌شد.
+  const insuranceScope = editSession?.doctor_uuid
+    ? `?doctor_uuid=${encodeURIComponent(editSession.doctor_uuid)}&inherit=1`
+    : '';
+
   const { data: contractsData } = useQuery<{ data: { data: Contract[] } }>({
-    queryKey: ['tenant-insurances'], queryFn: () => api.get('/api/v1/billing/tenant-insurances'),
+    queryKey: ['tenant-insurances', editSession?.doctor_uuid ?? null],
+    queryFn: () => api.get(`/api/v1/billing/tenant-insurances${insuranceScope}`),
   });
   const { data: pricingData } = useQuery<{ data: { free_visit_price_rials: number; require_visit_price: boolean } }>({
-    queryKey: ['insurance-pricing'], queryFn: () => api.get('/api/v1/insurance-pricing'),
+    queryKey: ['insurance-pricing', editSession?.doctor_uuid ?? null],
+    queryFn: () => api.get(`/api/v1/insurance-pricing${insuranceScope}`),
   });
   const freeVisit = (pricingData as any)?.data?.free_visit_price_rials ?? 0;
   const requireVisit = (pricingData as any)?.data?.require_visit_price ?? false;