결재 및 마스터 모듈을 v4 API 계약에 맞게 조정

lib/features/inventory/transactions/domain/entities/stock_transaction_input.dart

@@ -195,13 +195,23 @@ class StockTransactionListFilter {
         'transaction_status_id': transactionStatusId,
       if (warehouseId != null) 'warehouse_id': warehouseId,
       if (customerId != null) 'customer_id': customerId,
-      if (from != null) 'from': from!.toIso8601String(),
-      if (to != null) 'to': to!.toIso8601String(),
+      if (from != null) 'date_from': _formatDate(from!),
+      if (to != null) 'date_to': _formatDate(to!),
       if (sort != null && sort!.trim().isNotEmpty) 'sort': sort,
       if (order != null && order!.trim().isNotEmpty) 'order': order,
       if (include.isNotEmpty) 'include': include.join(','),
     };
   }
+
+  /// 백엔드가 요구하는 `yyyy-MM-dd`(NaiveDate) 형식으로 변환한다.
+  String _formatDate(DateTime value) {
+    final iso = value.toIso8601String();
+    final separatorIndex = iso.indexOf('T');
+    if (separatorIndex == -1) {
+      return iso;
+    }
+    return iso.substring(0, separatorIndex);
+  }
 }
 
 /// 재고 트랜잭션 생성 시 결재(Approval) 정보를 담는 입력 모델.