优化复购功能：指定商品复购付款时直接立减（不返现），解耦分销买家佣金，纯后端实现

addons/shopro/model/Activity.php

@@ -32,7 +32,7 @@ class Activity extends Model
 
     public static function getTypeList()
     {
-        return ['seckill' => '秒杀', 'timer' => '限时秒杀', 'robbuy' => '预约抢购', 'groupon' => '拼团', 'full_reduce' => '满额立减', 'full_discount' => '满额折扣', 'free_shipping' => '满额包邮'];
+        return ['seckill' => '秒杀', 'timer' => '限时秒杀', 'robbuy' => '预约抢购', 'groupon' => '拼团', 'full_reduce' => '满额立减', 'full_discount' => '满额折扣', 'free_shipping' => '满额包邮', 'repurchase' => '复购立减'];
     }
 
     /**
@@ -49,9 +49,11 @@ class Activity extends Model
             $tag .= $activity_type == 'full_reduce' ? '减' . $ruleData['discount'] : $ruleData['discount'] . '折';
         } else if ($activity_type == 'free_shipping') {
             $tag = '满' . $ruleData['full_num'] . ($ruleData['type'] == 'money' ? '元' : '件') . '包邮';
+        } else if ($activity_type == 'repurchase') {
+            $tag = '老客复购立减' . ($ruleData['discount'] ?? '') . '元';
         }
 
-        return $tag;
+        return $tag ?? '';
     }