修复出库时候找不到名称等问题

inventory-backend/app/services/inbound/product_service.py

@@ -30,7 +30,8 @@ class ProductInboundService:
 
             exists = query.first()
             if exists:
-                occupied_name = exists.material.name if (hasattr(exists, 'material') and exists.material) else "未知物料"
+                # [修改] material -> base
+                occupied_name = exists.base.name if (hasattr(exists, 'base') and exists.base) else "未知物料"
                 raise ValueError(f"序列号【{serial_number}】已存在！被成品 [{occupied_name}] 占用，请核查。")
 
     # ============================================================
@@ -318,6 +319,7 @@ class ProductInboundService:
 
             items = []
             for item in current_items:
+                # [注意] 因为Model层已经修改了 to_dict 内部的 material -> base，所以这里直接调 to_dict 即可
                 d = item.to_dict()
 
                 # 格式化日期