fix:입출금내역 상대방→상대계좌예금주명 변경 및 CERTKEY 분리

- 상대방 레이블을 상대계좌예금주명으로 변경
- AccountName 필드 우선 확인 (Cast fallback)
- EaccountController CERTKEY 테스트/운영 분리 적용

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/Http/Controllers/Barobill/EaccountController.php

@@ -47,9 +47,12 @@ public function __construct()
                 : 'https://ws.baroservice.com';
             $this->soapUrl = $baseUrl . '/BANKACCOUNT.asmx?WSDL';
         } else {
-            $this->certKey = config('services.barobill.cert_key', '');
-            $this->corpNum = config('services.barobill.corp_num', '');
             $this->isTestMode = config('services.barobill.test_mode', true);
+            // 테스트 모드에 따라 적절한 CERT_KEY 선택
+            $this->certKey = $this->isTestMode
+                ? config('services.barobill.cert_key_test', '')
+                : config('services.barobill.cert_key_prod', '');
+            $this->corpNum = config('services.barobill.corp_num', '');
             $this->soapUrl = $this->isTestMode
                 ? 'https://testws.baroservice.com/BANKACCOUNT.asmx?WSDL'
                 : 'https://ws.baroservice.com/BANKACCOUNT.asmx?WSDL';
@@ -439,7 +442,7 @@ private function parseTransactionLogs($resultData, string $defaultBankName = '',
                 'balance' => $balance,
                 'balanceFormatted' => number_format($balance),
                 'summary' => $fullSummary,
-                'cast' => $log->Cast ?? '',
+                'cast' => $log->AccountName ?? $log->Cast ?? '',
                 'memo' => $log->Memo ?? '',
                 'transOffice' => $log->TransOffice ?? '',
                 // 저장된 계정과목 정보 병합
@@ -706,7 +709,7 @@ public function exportExcel(Request $request): StreamedResponse|JsonResponse
                     '입금',
                     '출금',
                     '잔액',
-                    '상대방',
+                    '상대계좌예금주명',
                     '계정과목코드',
                     '계정과목명'
                 ]);