同时播放聊条音频的问题修复

pages/chat/components/ai-paging.vue

@@ -794,29 +794,10 @@ function readMarkdown(value, index) {
         clearTimeout(ttsDebounceTimer);
     }
     
-    // 如果当前正在播放其他消息，先停止
-    if (speechIndex.value !== index && speechIndex.value !== 0) {
-        console.log('🛑 Stopping current speech and starting new one');
-        speechIndex.value = index;
-        speak(value);
-        return;
-    }
-    
+    // 总是先停止当前播放，无论是不是同一消息
+    console.log('🛑 Always stopping current speech before starting new one');
     speechIndex.value = index;
     
-    // 如果当前正在播放且暂停了，直接恢复
-    if (isPaused.value && isSpeaking.value) {
-        console.log('▶️ Resuming paused speech');
-        resume();
-        return;
-    }
-    
-    // 如果当前正在播放且没有暂停，不需要重新开始
-    if (isSpeaking.value && !isPaused.value) {
-        console.log('🔊 Already speaking, no need to restart');
-        return;
-    }
-    
     // 使用防抖，避免频繁调用TTS
     ttsDebounceTimer = setTimeout(() => {
         console.log('🎵 Starting new speech');