fix(product): 修复产品统计查询逻辑

- 移除多余的 whereNull('spu_id') 条件以正确统计所有产品数量
- 确保出售中产品的计数包含所有相关记录而不过滤 spu_id 为空的情况

app/common/repositories/store/product/ProductRepository.php

@@ -654,7 +654,7 @@ class ProductRepository extends BaseRepository
         $result[] = [
             'type'  => 1,
             'name'  => '出售中' . $name,
-            'count' => $this->dao->search($merId, $this->switchType(1, $merId, $productType))->whereNull('spu_id')->count()
+            'count' => $this->dao->search($merId, $this->switchType(1, $merId, $productType))->count()
         ];
         $result[] = [
             'type'  => 2,