fix: remove unnecessary condition in play/pause logic for audio management

--bug=1058773 --user=刘瑞斌 【应用】语音播放开启自动播放，问答时没有流式播放 https://www.tapd.cn/62980211/s/1731458

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

@@ -537,7 +537,7 @@ onMounted(() => {
     const record_id = data.record_id
     bus.emit('play:pause', record_id)
     if (props.data.record_id == record_id) {
-      if (props.tts && props.tts_autoplay && data.is_end) {
+      if (props.tts && props.tts_autoplay) {
         if (audioManage.value) {
           audioManage.value.play(props.data.answer_text, data.is_end)
         }