移动端头部导航按钮图片添加alt文字

application/views/mobile_first/jh.php

@@ -38,7 +38,7 @@ height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
   <header class="headerbar" id="header">
     <img src="https://images.japanhighlights.com/allpicture/2025/04/b519a0526aed48fb85e4e2a88b91bd27_cut_26x25_241_1743694065.jpg"
       class="topnaviarrowdown action--open" width="26" height="25" style="position: absolute; top: 13px; left: 10px;"
-      title="navigation button">
+      title="navigation button" alt="top navigation button">
     <a href="/" style="width: 103px; display: block; margin: 0 auto;"> <img
         src="https://images.japanhighlights.com/allpicture/2025/04/6b9ed66f4ff3451a8d854d8f56af5262_cut_221x118_241_1743697804.jpg" alt="Japan Highlights logo"
         class="japanhighlightslogo img-responsive" width="238" height="117"></a>