update arena page

templates/arena.html

@@ -12,7 +12,7 @@
     <div id="tts-tab" class="tab-content active">
         <form class="input-container">
             <div class="input-group">
-                <button type="button" class="segmented-btn random-voice-btn" title="Roll random voice" style="display:none;">
+                <button type="button" class="segmented-btn random-voice-btn" title="Roll random voice">
                     <svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none"
                          stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"
                          class="lucide lucide-shuffle-icon lucide-shuffle">
@@ -793,7 +793,7 @@
                     // Reset the flag for both samples played
                     bothSamplesPlayed = false;
 
-                    // 新增：处理参考音色文件上传
+                    // 新增：处理参���音色文件上传
                     const voiceFileInput = document.getElementById('voice-file');
                     const file = voiceFileInput.files[0];
                     let fetchOptions;