fix: prevent inbound of disabled materials

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

@@ -60,7 +60,9 @@ class BuyInboundService:
     @staticmethod
     def search_base_material(keyword):
         try:
+            # [核心修改] 只查询已启用的物料，防止选择已禁用的历史物料
             query = MaterialBase.query.filter(MaterialBase.is_enabled == True)
+
             if keyword:
                 query = query.filter(
                     or_(
@@ -100,6 +102,10 @@ class BuyInboundService:
             if not material:
                 raise ValueError("所选物料不存在")
 
+            # [核心修改] 后端二次校验：如果物料已停用，禁止入库
+            if not material.is_enabled:
+                raise ValueError(f"物料【{material.name}】已停用，无法办理新入库。")
+
             # --- [修复点] 执行唯一性校验 ---
             BuyInboundService._check_unique(
                 base_id=base_id,