refactor: 后台横幅添加extra_image字段

app/admin/validate/v1/SysBannerItemValidate.php

@@ -22,6 +22,7 @@ class SysBannerItemValidate extends Validate
         'desc_txt_color'  => 'max:7',
         'type'            => 'in:image,video',
         'image'           => 'max:255',
+        'extra_image'     => 'max:255',
         'video'           => 'max:255',
         'link_to'         => 'requireIf:type,image|max:64|in:article,article_category,product,product_category,system_page,custom',
         'link'            => 'max:255',
@@ -47,6 +48,7 @@ class SysBannerItemValidate extends Validate
         'desc_txt_color.max'  => '描述字体颜色最多不能超过7个字符',
         'type.in'             => '显示类型必须是image或video',
         'image.max'           => '图片地址最多不能超过255个字符',
+        'extra_image.max'     => '额外图片地址最多不能超过255个字符',
         'video.max'           => '视频地址最多不能超过255个字符',
         'link_to.requireIf'   => '链接类型不能为空',
         'link_to.max'         => '链接类型最多不能超过64个字符',