fix: 修复非单订阅模式下过期用户重复购买产生双订阅的问题

1. purchaseLogic: 非单订阅模式下购买前查询已有订阅，路由为续费(type=2)
2. activateOrderLogic: 续费激活时触发节点分组重算，确保过期续费后权限生效

Co-Authored-By: claude-flow <ruv@ruv.net>

queue/logic/order/activateOrderLogic.go

@@ -895,6 +895,9 @@ func (l *ActivateOrderLogic) Renewal(ctx context.Context, orderInfo *order.Order
 		}
 	}
 
+	// Trigger user group recalculation (needed when renewing an expired subscription)
+	l.triggerUserGroupRecalculation(ctx, userInfo.Id)
+
 	// Clear user subscription cache
 	err = l.svc.UserModel.ClearSubscribeCache(ctx, userSub)
 	if err != nil {