fix: add self check to resume speech synthesis in ChatOperationButton

--bug=1058777 --user=刘瑞斌 【应用】开启语音自动播放，浏览器播放，暂停第一次对话的播放后，进行第二次对话，自动播放会先继续播放上一次对话 https://www.tapd.cn/62980211/s/1731474

ui/src/components/ai-chat/component/operation-button/ChatOperationButton.vue

@@ -464,7 +464,7 @@ class AudioManage {
         this.statusList[index] = AudioStatus.ERROR
       }
     } else {
-      if (window.speechSynthesis.paused) {
+      if (window.speechSynthesis.paused && self) {
         window.speechSynthesis.resume()
         this.statusList[index] = AudioStatus.PLAY_INT
       } else {