fix(hexiao): 调整地址水印截取长度

- 将地址水印的截取长度从12个字符增加到20个字符
- 防止地址过长时被过度截断导致信息丢失

pages/hexiao/ywy/add_retail.vue

@@ -231,8 +231,8 @@ export default {
                 // 添加地址水印
                 if (address) {
                   let addressText = address;
-                  if (address.length > 12) {
-                    addressText = address.substring(0, 12) + '...';
+                  if (address.length > 20) {
+                    addressText = address.substring(0, 20) + '...';
                   }
                   ctx.fillText(addressText, width - 20, height - 15);
                 }