refactor(warehouse): 优化仓库产品逻辑中的数值处理

- 将 price、purchase 和 total_price 字段的默认值改为 0
- 确保这些字段在没有提供值时不会为空字符串
- 提高了代码的健壮性和一致性

app/admin/logic/warehouse_product/WarehouseProductLogic.php

@@ -154,8 +154,9 @@ class WarehouseProductLogic extends BaseLogic
                 'nums' => $params['nums'],
                 'before_nums' => $storege['nums'],
                 'after_nums' => $after_nums,
-                'purchase' => $params['purchase'] ?? '',
-                'total_price' => $params['total_price'] ?? '',
+                'price' => $params['price'] ?? 0,
+                'purchase' => $params['purchase'] ?? 0,
+                'total_price' => $params['total_price'] ?? 0,
                 'admin_id' => $params['admin_id'],
                 'code' => $params['code'] ?? '',
                 'status' => 1,