style:二维码中间图片样式优化

pages/index/index.vue

@@ -297,6 +297,8 @@
 				qrcodeUrl:'https://jje.admin.xinyuekj.com.cn/recharge/recharge?storeId={promotionStoreId}&techNo={techNo}',
 				options: {
 					// 指定二维码前景，一般可在中间放logo
+					foregroundImagePadding:2,
+					foregroundImageBorderRadius:5,
 					foregroundImageSrc: '/static/logo.png'
 				}