fix(chat): 修复语音输入框初始化问题

- 在打开语音模态框时重置当前在线文本和最终文本数组
- 确保每次录音开始时都能获得最新的输入内容

src/views/chat/components/VoiceInput.vue

@@ -152,6 +152,8 @@ const openVoiceModal = async () => {
   showVoiceModal.value = true
   isRecording.value = false
   remainingTime.value = 30
+  currentOnlineText = ''
+  finalTexts.value = []
   audioChunks = []
 
   // 自动开始录音