fix: review — 移除未用import + v6 fallback兼容旧格式version.txt

ota/h5/index-v6.html

@@ -48,6 +48,7 @@ function checkUpdate(){
  .then(r=>{if(!r.ok)throw Error('HTTP '+r.status);return r.text()})
  .then(function(t){t=t.trim();log('remote: '+t);
   var parts=t.indexOf('|')>0?t.split('|'):[t];var remoteVer=parts[0];dlUrl=parts[1]||'';
+  if(!dlUrl)dlUrl=BASE+'/h5/index-v'+remoteVer.replace('0.1.0-dav-android-','')+'.html';
   var local='0.1.0-dav-android-6';
   if(remoteVer!==local){dlVer=remoteVer;
    log('*** NEW VERSION ***');document.getElementById('btnApply').disabled=false}