fix: avatar mode default on, show AI text in chat

zhiyin-app/src/pages/interview/interview.vue

@@ -83,7 +83,7 @@ const answeredCount = ref(0)
 const isComplete = ref(false)
 const scrollToId = ref('')
 const position = ref('')
-const avatarMode = ref(false)
+const avatarMode = ref(true)
 const aiSpeechText = ref('')
 const aiAudioUrl = ref('')
 const isSpeaking = ref(false)
@@ -173,11 +173,9 @@ const sendAnswer = async () => {
     })
     if (res.statusCode === 200 && res.data?.messages) {
       const aiMsg = res.data.messages.find(m => m.role === 'ai')
+      messages.value.push(...res.data.messages)
       if (avatarMode.value && aiMsg) {
-        // In avatar mode, only show avatar speaking, don't add to chat
         await speakAiText(aiMsg.content, res.data.ttsHash)
-      } else {
-        messages.value.push(...res.data.messages)
       }
       answeredCount.value = res.data.questionCount || answeredCount.value + 1
       if (res.data.ttsHash && !avatarMode.value) {