update arena page

templates/arena.html

@@ -690,7 +690,7 @@
                 function fetchCachedSentences() {
                     fetch('/api/tts/cached-sentences')
                         .then(response => response.ok ? response.json() : Promise.reject('Failed to fetch cached sentences'))
-                        .then(data => {
+                        .then( data => {
                             cachedSentences = data;
                             console.log(`Fetched ${cachedSentences.length} cached sentences.`);
                         })
@@ -1011,6 +1011,12 @@
                     }
                     textInput.value = selectedText;
                     textInput.focus();
+
+                    // 如果页面上没有prompt音频文件，则载入随机的prompt音频
+                    const voiceFileInput = document.getElementById('voice-file');
+                    if (voiceFileInput && voiceFileInput.files.length === 0) {
+                        handleRandomVoice();
+                    }
                 }
 
                 function handleRandomVoice() {