fix: Fix browser text to speech cannot resume and cancel

--bug=1052345 --user=刘瑞斌 【github#2352】【应用】使用浏览器内置TTS，切换历史记录内容播放会没有声音 https://www.tapd.cn/57709429/s/1657771

Author: liuruibin

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

@@ -200,7 +200,7 @@ const playAnswerTextPart = () => {
     if (audioList.value[currentAudioIndex.value] !== utterance.value?.text) {
       window.speechSynthesis.cancel()
     }
-    if (window.speechSynthesis.paused) {
+    if (window.speechSynthesis.paused && audioList.value[currentAudioIndex.value] === utterance.value?.text) {
       window.speechSynthesis.resume()
       return
     }

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

@@ -176,7 +176,7 @@ const playAnswerTextPart = () => {
     if (audioList.value[currentAudioIndex.value] !== utterance.value?.text) {
       window.speechSynthesis.cancel()
     }
-    if (window.speechSynthesis.paused) {
+    if (window.speechSynthesis.paused && audioList.value[currentAudioIndex.value] === utterance.value?.text) {
       window.speechSynthesis.resume()
       return
     }

ui/src/views/chat/pc/index.vue

@@ -321,6 +321,14 @@ const clickListHandle = (item: any) => {
     currentChatName.value = item.abstract
     if (currentChatId.value !== 'new') {
       getChatRecord()
+
+      // 切换对话后，取消暂停的浏览器播放
+      if (window.speechSynthesis.paused && window.speechSynthesis.speaking) {
+        window.speechSynthesis.resume()
+        nextTick(() => {
+          window.speechSynthesis.cancel()
+        })
+      }
     }
   }
   if (common.isMobile()) {