修复两个问题

src/Core/DomainModel.php

@@ -27,6 +27,7 @@ class DomainModel {
     public const ORDER_PRODUCT_RESOURCE     = 'resource';
     public const ORDER_PRODUCT_VIP          = 'vip';
     public const ORDER_PRODUCT_RECHARGE     = 'recharge';
+    public const ORDER_PRODUCT_POINTS       = 'points';
 
     /**
      * Human labels for aksrt_order.product_type (front-end order center).
@@ -38,6 +39,7 @@ class DomainModel {
             self::ORDER_PRODUCT_RESOURCE     => __('付费内容', 'aksrt'),
             self::ORDER_PRODUCT_VIP          => __('VIP 会员', 'aksrt'),
             self::ORDER_PRODUCT_RECHARGE     => __('余额充值', 'aksrt'),
+            self::ORDER_PRODUCT_POINTS       => __('积分购买', 'aksrt'),
         ];
     }