fix: H5缓存命中时替换body内容而非仅显示徽章

- 使用createHTMLDocument解析缓存HTML
- innerHTML替换body以显示完整热更新页面(含渠道选择器等)

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

@@ -45,10 +45,10 @@ function applyUpdate(){
 (function(){
  var b=localStorage.getItem('gca_html'),v=localStorage.getItem('gca_ver');
  if(b&&v&&v!==document.getElementById('ver').innerText){
-  // Show badge but don't rewrite page (avoids double-render)
-  var el=document.createElement('span');el.className='badge';el.style.cssText='background:#22c55e;color:#000';
-  el.innerText='CACHED v'+v.replace('0.1.0-dav-android-','');document.querySelector('h1').appendChild(el);
-  document.getElementById('ver').innerText=v
+  var d=document.implementation.createHTMLDocument();
+  d.documentElement.innerHTML=b;
+  var newBody=d.body.innerHTML;
+  if(newBody){document.body.innerHTML=newBody;document.title=d.title}
  }
 })();
 </script></body></html>