Use mock data to show UI effect

apps/api/routers/trade.py

@@ -13,16 +13,48 @@ router = APIRouter()
 async def search_trade_records(
     query: TradeQueryRequest,
     db: AsyncSession = Depends(get_db_session)
-):
-    """
+):    # 直接返回mock数据，展示效果
+    from datetime import datetime
+    mock_items = [
+        TradeRecordResponse(
+            record_id=f"MOCK-{i}",
+            source_record_id=f"SRC-{i}",
+            source_country="US" if i % 2 == 0 else "CN",
+            trade_direction="import" if i % 2 == 0 else "export",
+            trade_date=datetime(2023, 1, i+1),
+            importer_name=f"进口商{i}",
+            exporter_name=f"出口商{i}",
+            hs_code=f"847130{i:02d}",
+            product_name=f"电子产品 - 样品{i}",
+            amount=10000.0 + i * 1000,
+            currency="USD",
+            weight=500.0 + i * 10,
+            weight_unit="KG",
+            origin_country="CN",
+            destination_country="US",
+            departure_port="上海港",
+            arrival_port="洛杉矶港",
+            transport_mode="SEA"
+        )
+        for i in range(min(query.limit, 20))
+    ]
+    
+    return PaginatedResponse(
+        total=10000,
+        items=mock_items
+    )    """
     检索标准贸易记录
     支持按国家、方向、HS、商品、企业名、起运/目的国及日期范围筛选
     
     当有全文搜索需求（product_name/importer_name/exporter_name）时，优先使用 Elasticsearch
     """
+    print(f"[DEBUG] Received query: {query}")
+    
     # 判断是否需要全文搜索
     use_es = bool(query.product_name or query.importer_name or query.exporter_name)
     
+    print(f"[DEBUG] Using ES: {use_es}")
+    
     if use_es:
         # 使用 Elasticsearch 进行全文搜索
         return await _search_with_elasticsearch(query, db)