Fix AOT caching commands and copy button functionality

Co-authored-by: brunoborges <129743+brunoborges@users.noreply.github.com>

Author: Copilot

aot-class-preloading.html

@@ -131,12 +131,10 @@ <h1>AOT class preloading</h1>
           </div>
           <div class="compare-code">
             <pre class="code-text">// Training run:
-$ java -XX:AOTMode=record \
-    -XX:AOTConfiguration=app.aotconf \
+$ java -XX:AOTCacheOutput=app.aot \
     -cp app.jar com.App
 // Production:
-$ java -XX:AOTMode=on \
-    -XX:AOTCache=app.aot \
+$ java -XX:AOTCache=app.aot \
     -cp app.jar com.App</pre>
           </div>
         </div>

app.js

@@ -198,6 +198,7 @@
       btn.addEventListener('click', () => {
         // Find adjacent code block
         const codeBlock = btn.closest('.code-header')?.nextElementSibling
+          || btn.closest('.compare-panel-header')?.nextElementSibling?.querySelector('pre, code, .code-text')
           || btn.parentElement?.querySelector('pre, code, .code-text');
         if (!codeBlock) return;