feat: H5热更新 v6→v7 — 远端version.txt=v7 + index-v7.html

- ota/version.txt → 0.1.0-dav-android-7
- ota/h5/index-v7.html → 绿色标题+✅热更新成功提示
- embedded index.html → 下载目标改为v7

packages/client-android/android/app/src/main/assets/index.html

@@ -27,7 +27,7 @@ function checkUpdate(){
  .then(r=>{if(!r.ok)throw Error('HTTP '+r.status);return r.text()})
  .then(t=>{t=t.trim();log('remote: '+t);
   var local=document.getElementById('ver').innerText;
-  if(t!==local){dlVer=t;dlUrl=BASE+'/h5/index-v6.html';
+  if(t!==local){dlVer=t;dlUrl=BASE+'/h5/index-v7.html';
    log('*** NEW VERSION: '+dlVer+' ***');document.getElementById('btnApply').disabled=false}
   else log('up to date')})
  .catch(e=>log('ERR: '+e.message))