fix(admin): paginate claims & settlement lists for backend-audit 50-cap

GET /billing/claims and GET /settlement now return only the first 50 rows by
default (data.data unchanged, data.meta added). ClaimsPage and
RepresentationSettlementPage read the full array with no pager, so rows beyond 50
were unreachable. Add page state + ?page/limit + the existing <Pagination>
(reading data.meta.totalRecords).

No change needed for: 422 on claim approve/pay (api.ts already surfaces the
backend message via toast; the admin UI sends no amount so it's unreachable),
the owner-only appointment-settings endpoints (admin user bypasses), and refresh
rotation (authStore.refresh already persists the rotated refresh_token).

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

assets/admin/pages/ClaimsPage.tsx

@@ -1,4 +1,4 @@
-import { useState, useMemo } from 'react';
+import { useState, useMemo, useEffect } from 'react';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { CheckIcon, XMarkIcon, PaperAirplaneIcon, BanknotesIcon, MagnifyingGlassIcon, ArrowPathIcon } from '@heroicons/react/24/outline';
 import { toast } from 'sonner';
@@ -9,6 +9,7 @@ import Modal from '../components/ui/Modal';
 import SearchableSelect from '../components/ui/SearchableSelect';
 import PersianDatePicker from '../components/ui/PersianDatePicker';
 import FeatureGate from '../components/ui/FeatureGate';
+import Pagination from '../components/ui/Pagination';
 
 const isoNDaysAgo = (days: number): string => {
   const d = new Date();
@@ -86,6 +87,11 @@ export default function ClaimsPage() {
   const [searchInput, setSearchInput] = useState('');
   const [rejectTarget, setRejectTarget] = useState<Claim | null>(null);
   const [rejectReason, setRejectReason] = useState('');
+  const [page, setPage] = useState(1);
+  const limit = 20;
+
+  // back to page 1 whenever a filter changes
+  useEffect(() => { setPage(1); }, [statusFilter, insuranceFilter, fromDate, toDate, search]);
 
   const queryString = useMemo(() => {
     const p = new URLSearchParams();
@@ -94,9 +100,11 @@ export default function ClaimsPage() {
     const from = toUnix(fromDate); if (from) p.set('from', String(from));
     const to = endOfDayUnix(toDate); if (to) p.set('to', String(to));
     if (search.trim()) p.set('q', search.trim());
+    p.set('page', String(page));
+    p.set('limit', String(limit));
     const s = p.toString();
     return s ? `?${s}` : '';
-  }, [statusFilter, insuranceFilter, fromDate, toDate, search]);
+  }, [statusFilter, insuranceFilter, fromDate, toDate, search, page]);
 
   const claimsQuery = useQuery<{ data: { data: Claim[] } }>({
     queryKey: ['claims', queryString],
@@ -115,6 +123,7 @@ export default function ClaimsPage() {
   });
 
   const claims = (claimsQuery.data as any)?.data?.data ?? [];
+  const claimsTotal = (claimsQuery.data as any)?.data?.meta?.totalRecords ?? 0;
   const debt = (debtQuery.data as any)?.data?.data ?? [];
 
   const transitionMut = useMutation({
@@ -332,6 +341,7 @@ export default function ClaimsPage() {
             })}
           </div>
         )}
+        <Pagination page={page} total={claimsTotal} limit={limit} onPageChange={setPage} />
       </div>
 
       <Modal open={!!rejectTarget} onClose={() => setRejectTarget(null)} title="رد مطالبه"