fix: restore carrier reporting status summaries

src/apps/admin/enterprise-signatures/EnterpriseSignaturesTable.tsx

@@ -1,5 +1,5 @@
 import type { Dispatch, SetStateAction } from 'react';
-import { ArrowDown, ArrowUp, ChevronDown, ChevronRight, Edit3, Plus } from 'lucide-react';
+import { ChevronDown, ChevronRight, Edit3, Plus, Triangle } from 'lucide-react';
 import type { ClientSmsSignature } from '@/api/adminApi';
 import { Button, DeleteRiskAction, Pagination } from '@/components/ui';
 import { AuditStatusTag, CarrierReportCount, formatSignatureName, readDrainagePayload, signatureCardVisual } from './signature.helpers';
@@ -51,8 +51,8 @@ export function EnterpriseSignaturesTable({
         <span className="enterprise-signature-table__sortable">
           签名
           <span className="enterprise-signature-table__sort-actions">
-            <Button aria-pressed={signatureSort === 'asc'} icon={<ArrowUp size={13} />} iconOnly onClick={() => setSignatureSort('asc')} size="sm" variant={signatureSort === 'asc' ? 'secondary' : 'ghost'}>签名升序</Button>
-            <Button aria-pressed={signatureSort === 'desc'} icon={<ArrowDown size={13} />} iconOnly onClick={() => setSignatureSort('desc')} size="sm" variant={signatureSort === 'desc' ? 'secondary' : 'ghost'}>签名降序</Button>
+            <Button aria-pressed={signatureSort === 'asc'} icon={<Triangle aria-hidden="true" fill="currentColor" size={11} />} iconOnly onClick={() => setSignatureSort('asc')} size="sm" variant={signatureSort === 'asc' ? 'secondary' : 'ghost'}>签名升序</Button>
+            <Button aria-pressed={signatureSort === 'desc'} icon={<Triangle aria-hidden="true" className="enterprise-signature-table__sort-triangle--down" fill="currentColor" size={11} />} iconOnly onClick={() => setSignatureSort('desc')} size="sm" variant={signatureSort === 'desc' ? 'secondary' : 'ghost'}>签名降序</Button>
           </span>
         </span>
         <span>企业</span>