feat: TTS服务 + 数字人面试组件 (P1)

backend/src/app.module.ts

@@ -23,6 +23,7 @@ import { ProgressModule } from './modules/progress/progress.module'
 import { ContributionModule } from './modules/contribution/contribution.module'
 import { DailyQuestionModule } from './modules/daily-question/daily-question.module'
 import { ScheduleModule } from './modules/schedule/schedule.module'
+import { TtsModule } from './modules/tts/tts.module'
 
 const MONGODB_URI = process.env.MONGODB_URI || 'mongodb://localhost:27017/zhiyin'
 
@@ -54,6 +55,7 @@ const MONGODB_URI = process.env.MONGODB_URI || 'mongodb://localhost:27017/zhiyin
     ContributionModule,
     DailyQuestionModule,
     ScheduleModule,
+    TtsModule,
   ],
   providers: [
     JwtStrategy,

backend/src/modules/interview/interview.controller.ts

@@ -28,7 +28,9 @@ export class InterviewController {
     @Param('id') id: string,
     @CurrentUser('userId') userId: string,
     @Body('answer') answer: string,
+    @Body('avatar') avatar?: boolean,
   ) {
+    if (avatar) return this.interviewService.answerWithAvatar(id, userId, answer)
     return this.interviewService.answer(id, userId, answer)
   }
 

backend/src/modules/interview/interview.module.ts

@@ -5,6 +5,7 @@ import { InterviewService } from './interview.service'
 import { Interview, InterviewSchema } from './interview.schema'
 import { Progress, ProgressSchema } from '../schemas/progress.schema'
 import { UserModule } from '../user/user.module'
+import { TtsModule } from '../tts/tts.module'
 
 @Module({
   imports: [
@@ -13,6 +14,7 @@ import { UserModule } from '../user/user.module'
       { name: Progress.name, schema: ProgressSchema },
     ]),
     UserModule,
+    TtsModule,
   ],
   controllers: [InterviewController],
   providers: [InterviewService],

backend/src/modules/interview/interview.service.ts

@@ -6,6 +6,7 @@ import { Progress, ProgressDocument } from '../schemas/progress.schema'
 import { AiService } from '../ai/ai.service'
 import { UserService } from '../user/user.service'
 import { QuotaService } from '../user/quota.service'
+import { TtsService } from '../tts/tts.service'
 import { analyzeSpeech } from '../../common/utils/filler-words'
 
 @Injectable()
@@ -16,6 +17,7 @@ export class InterviewService {
     private aiService: AiService,
     private userService: UserService,
     private quotaService: QuotaService,
+    private ttsService: TtsService,
   ) {}
 
   async create(userId: string, position: string) {
@@ -99,6 +101,20 @@ ${conversationHistory}
     }
   }
 
+  async answerWithAvatar(interviewId: string, userId: string, answer: string) {
+    const base = await this.answer(interviewId, userId, answer)
+    const aiMsg = base.messages?.find(m => m.role === 'ai')
+    if (aiMsg?.content) {
+      try {
+        const tts = await this.ttsService.synthesize(aiMsg.content)
+        return { ...base, ttsHash: tts.hash, ttsDurationMs: tts.durationMs }
+      } catch {
+        // TTS failure is non-critical, return without audio
+      }
+    }
+    return base
+  }
+
   async complete(interviewId: string, userId: string) {
     const interview = await this.interviewModel.findOne({ _id: interviewId, userId }).exec()
     if (!interview) throw new HttpException('面试不存在', HttpStatus.NOT_FOUND)

backend/src/modules/tts/tts.controller.ts

@@ -0,0 +1,33 @@
+import { Controller, Get, Post, Body, Param, Res, HttpException, HttpStatus } from '@nestjs/common'
+import { Response } from 'express'
+import * as fs from 'fs'
+import { TtsService } from './tts.service'
+import { Public } from '../../common/decorators/public.decorator'
+
+@Controller('tts')
+export class TtsController {
+  constructor(private ttsService: TtsService) {}
+
+  @Public()
+  @Post('synthesize')
+  async synthesize(@Body('text') text: string, @Body('voice') voice?: string) {
+    if (!text || text.length > 500) {
+      throw new HttpException('文本不能为空且不超过500字', HttpStatus.BAD_REQUEST)
+    }
+    const result = await this.ttsService.synthesize(text, voice)
+    return { hash: result.hash, durationMs: result.durationMs }
+  }
+
+  @Public()
+  @Get('audio/:hash')
+  async getAudio(@Param('hash') hash: string, @Res() res: Response) {
+    const filePath = this.ttsService.getCachedPath(hash)
+    if (!filePath) {
+      throw new HttpException('音频不存在', HttpStatus.NOT_FOUND)
+    }
+    const stream = fs.createReadStream(filePath)
+    res.setHeader('Content-Type', 'audio/mpeg')
+    res.setHeader('Cache-Control', 'public, max-age=31536000')
+    stream.pipe(res)
+  }
+}

backend/src/modules/tts/tts.module.ts

@@ -0,0 +1,10 @@
+import { Module } from '@nestjs/common'
+import { TtsController } from './tts.controller'
+import { TtsService } from './tts.service'
+
+@Module({
+  controllers: [TtsController],
+  providers: [TtsService],
+  exports: [TtsService],
+})
+export class TtsModule {}

backend/src/modules/tts/tts.service.ts

@@ -0,0 +1,67 @@
+import * as crypto from 'crypto'
+import * as fs from 'fs'
+import * as path from 'path'
+import { execSync } from 'child_process'
+import { Injectable, Logger } from '@nestjs/common'
+
+const CACHE_DIR = '/tmp/tts-cache'
+
+interface TtsResult {
+  hash: string
+  filePath: string
+  durationMs: number
+}
+
+@Injectable()
+export class TtsService {
+  private readonly logger = new Logger(TtsService.name)
+
+  constructor() {
+    if (!fs.existsSync(CACHE_DIR)) {
+      fs.mkdirSync(CACHE_DIR, { recursive: true })
+    }
+  }
+
+  async synthesize(text: string, voice: string = 'zh-CN-XiaoxiaoNeural'): Promise<TtsResult> {
+    const hash = crypto.createHash('md5').update(text + voice).digest('hex')
+    const filePath = path.join(CACHE_DIR, `${hash}.mp3`)
+
+    if (fs.existsSync(filePath)) {
+      const durationMs = await this.getDuration(filePath)
+      return { hash, filePath, durationMs }
+    }
+
+    try {
+      execSync(
+        `edge-tts --voice "${voice}" --text "${this.escapeText(text)}" --write-media "${filePath}"`,
+        { timeout: 30000 },
+      )
+      const durationMs = await this.getDuration(filePath)
+      this.logger.log(`TTS generated: hash=${hash} text="${text.slice(0, 40)}..." duration=${durationMs}ms`)
+      return { hash, filePath, durationMs }
+    } catch (e) {
+      this.logger.error(`TTS failed: ${e.message}`)
+      throw e
+    }
+  }
+
+  getCachedPath(hash: string): string | null {
+    const filePath = path.join(CACHE_DIR, `${hash}.mp3`)
+    return fs.existsSync(filePath) ? filePath : null
+  }
+
+  private escapeText(text: string): string {
+    return text.replace(/"/g, '\\"').replace(/\n/g, ' ').replace(/\r/g, '')
+  }
+
+  private async getDuration(filePath: string): Promise<number> {
+    try {
+      // Estimate duration from file size (~16kbps for mp3 at 22050Hz)
+      const stat = fs.statSync(filePath)
+      const bytesPerMs = 16 * 1024 / 8 / 1000  // 16kbps → bytes per ms
+      return Math.round(stat.size / bytesPerMs)
+    } catch {
+      return 3000
+    }
+  }
+}

zhiyin-app/src/components/digital-human.vue

@@ -0,0 +1,291 @@
+<template>
+  <view class="digital-human">
+    <view class="avatar-stage">
+      <view class="avatar-ring" :class="{ speaking: isSpeaking }">
+        <!-- Default CSS avatar if image fails -->
+        <view class="avatar-default" v-if="imgFailed">
+          <text class="avatar-initials">AI</text>
+        </view>
+        <image class="avatar-img" :src="avatarSrc" mode="aspectFill" @error="imgFailed = true" v-else />
+        <canvas
+          v-if="isH5"
+          id="dh-mouth"
+          class="mouth-canvas"
+        ></canvas>
+      </view>
+      <text class="role-label">AI 面试官</text>
+    </view>
+
+    <view class="speech-area" v-if="currentText">
+      <view class="speech-bubble">
+        <text class="speech-text">{{ currentText }}</text>
+      </view>
+    </view>
+  </view>
+</template>
+
+<script setup>
+import { ref, computed, watch, onMounted, onBeforeUnmount, nextTick } from 'vue'
+
+const props = defineProps({
+  text: { type: String, default: '' },
+  audioUrl: { type: String, default: '' },
+  avatarUrl: { type: String, default: '' },
+  autoPlay: { type: Boolean, default: true },
+})
+
+const emit = defineEmits(['speaking-start', 'speaking-end'])
+
+const isH5 = ref(false)
+const isSpeaking = ref(false)
+const currentText = ref('')
+const imgFailed = ref(false)
+let audioEl = null
+let audioCtx = null
+let analyser = null
+let animFrameId = null
+let mouthScale = 0
+
+onMounted(() => {
+  isH5.value = typeof window !== 'undefined' && typeof document !== 'undefined'
+  initCanvas()
+})
+
+onBeforeUnmount(() => {
+  stopAudio()
+})
+
+watch(() => props.audioUrl, (url) => {
+  if (url && props.autoPlay) {
+    nextTick(() => playAudio(url))
+  }
+})
+
+watch(() => props.text, (txt) => {
+  currentText.value = txt
+})
+
+const avatarSrc = computed(() => {
+  return props.avatarUrl || '/static/default-avatar.png'
+})
+
+function initCanvas() {
+  if (!isH5.value) return
+  const canvas = document.getElementById('dh-mouth')
+  if (!canvas) return
+  // Size the canvas to match mouth area (~40% width, ~15% height, centered bottom)
+  const parent = canvas.parentElement
+  if (!parent) return
+  const rect = parent.getBoundingClientRect()
+  canvas.width = rect.width * 0.4
+  canvas.height = rect.height * 0.15
+  canvas.style.width = canvas.width + 'px'
+  canvas.style.height = canvas.height + 'px'
+  canvas.style.position = 'absolute'
+  canvas.style.bottom = '18%'
+  canvas.style.left = '30%'
+}
+
+function drawMouth(openRatio) {
+  if (!isH5.value) return
+  const canvas = document.getElementById('dh-mouth')
+  if (!canvas) return
+  const ctx = canvas.getContext('2d')
+  if (!ctx) return
+
+  const w = canvas.width
+  const h = canvas.height
+  ctx.clearRect(0, 0, w, h)
+
+  const mouthH = Math.max(2, h * openRatio)
+  const mouthW = w * 0.8
+
+  ctx.fillStyle = '#C97B84'
+  ctx.beginPath()
+  ctx.ellipse(w / 2, h / 2 + (h - mouthH) / 2, mouthW / 2, mouthH / 2, 0, 0, Math.PI * 2)
+  ctx.fill()
+
+  if (openRatio > 0.1) {
+    ctx.fillStyle = '#2D1B1E'
+    ctx.beginPath()
+    ctx.ellipse(w / 2, h / 2 + (h - mouthH) / 2 + 1, mouthW / 4, mouthH / 4, 0, 0, Math.PI * 2)
+    ctx.fill()
+  }
+}
+
+async function playAudio(url) {
+  stopAudio()
+  isSpeaking.value = true
+  emit('speaking-start')
+
+  try {
+    audioEl = new Audio(url)
+
+    if (isH5.value) {
+      audioCtx = new (window.AudioContext || window.webkitAudioContext)()
+      const source = audioCtx.createMediaElementSource(audioEl)
+      analyser = audioCtx.createAnalyser()
+      analyser.fftSize = 256
+      source.connect(analyser)
+      analyser.connect(audioCtx.destination)
+    }
+
+    audioEl.onended = () => {
+      finishSpeaking()
+    }
+
+    audioEl.onerror = () => {
+      finishSpeaking()
+    }
+
+    await audioEl.play()
+
+    if (analyser) {
+      animateMouth()
+    }
+  } catch (e) {
+    finishSpeaking()
+  }
+}
+
+function animateMouth() {
+  if (!analyser) return
+  const dataArray = new Uint8Array(analyser.frequencyBinCount)
+
+  function tick() {
+    if (!isSpeaking.value) return
+    analyser.getByteFrequencyData(dataArray)
+    const sum = dataArray.reduce((a, b) => a + b, 0)
+    const avg = sum / dataArray.length
+    mouthScale = Math.min(1, avg / 128)
+    // Smooth
+    mouthScale = Math.max(0.05, mouthScale)
+    drawMouth(mouthScale)
+    animFrameId = requestAnimationFrame(tick)
+  }
+
+  tick()
+}
+
+function finishSpeaking() {
+  isSpeaking.value = false
+  emit('speaking-end')
+  if (analyser) {
+    mouthScale = 0
+    drawMouth(0)
+  }
+  cleanupAudio()
+}
+
+function cleanupAudio() {
+  if (animFrameId) { cancelAnimationFrame(animFrameId); animFrameId = null }
+  if (audioCtx) { audioCtx.close().catch(() => {}); audioCtx = null }
+  analyser = null
+  audioEl = null
+}
+
+function stopAudio() {
+  if (audioEl) {
+    try { audioEl.pause(); audioEl.src = '' } catch {}
+  }
+  finishSpeaking()
+}
+
+defineExpose({ play: playAudio, stop: stopAudio })
+</script>
+
+<style scoped>
+.digital-human {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  padding: 20rpx 0;
+}
+
+/* Avatar stage */
+.avatar-stage {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 12rpx;
+}
+
+.avatar-ring {
+  width: 200rpx;
+  height: 200rpx;
+  border-radius: 50%;
+  border: 4rpx solid #E5E7EB;
+  overflow: hidden;
+  position: relative;
+  transition: border-color 0.3s, box-shadow 0.3s;
+}
+
+.avatar-ring.speaking {
+  border-color: #6366F1;
+  box-shadow: 0 0 30rpx rgba(99, 102, 241, 0.3);
+}
+
+.avatar-img {
+  width: 100%;
+  height: 100%;
+}
+
+.avatar-default {
+  width: 100%;
+  height: 100%;
+  background: linear-gradient(135deg, #6366F1, #8B5CF6);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.avatar-initials {
+  font-size: 48rpx;
+  font-weight: 700;
+  color: #FFFFFF;
+}
+
+.mouth-canvas {
+  pointer-events: none;
+}
+
+.role-label {
+  font-size: 22rpx;
+  color: #6B7280;
+  background: #F3F4F6;
+  padding: 4rpx 20rpx;
+  border-radius: 20rpx;
+}
+
+/* Speech bubble */
+.speech-area {
+  margin-top: 24rpx;
+  padding: 0 40rpx;
+  width: 100%;
+  box-sizing: border-box;
+}
+
+.speech-bubble {
+  background: #FFFFFF;
+  border-radius: 16rpx;
+  padding: 24rpx 28rpx;
+  box-shadow: 0 4rpx 20rpx rgba(0, 0, 0, 0.06);
+  position: relative;
+}
+
+.speech-bubble::before {
+  content: '';
+  position: absolute;
+  top: -12rpx;
+  left: 60rpx;
+  border: 12rpx solid transparent;
+  border-bottom-color: #FFFFFF;
+  border-top: none;
+}
+
+.speech-text {
+  font-size: 28rpx;
+  line-height: 1.7;
+  color: #1F2937;
+}
+</style>

zhiyin-app/src/config.ts

@@ -86,6 +86,10 @@ export const API_ENDPOINTS = {
     CHECK: (outTradeNo: string) => `/payment/check/${outTradeNo}`,
     ACTIVATE: '/payment/activate',
   },
+  TTS: {
+    SYNTHESIZE: '/tts/synthesize',
+    AUDIO: (hash: string) => `/tts/audio/${hash}`,
+  },
 } as const
 
 const PROD_API_HOST = import.meta.env.VITE_PROD_API_HOST || 'https://zhiyinwx.yzrcloud.cn'

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

@@ -1,6 +1,5 @@
 <template>
   <view class="page">
-    <!-- Top bar -->
     <view class="topbar">
       <view class="topbar-inner">
         <view class="back-btn" @click="confirmExit"><text class="back-arrow">‹</text></view>
@@ -14,19 +13,34 @@
           </view>
           <text class="topbar-timer">⏱ {{ formatTime }}</text>
         </view>
-        <view class="topbar-right"></view>
+        <view class="topbar-right">
+          <text class="avatar-toggle" @click="avatarMode = !avatarMode">
+            {{ avatarMode ? '💬' : '👤' }}
+          </text>
+        </view>
       </view>
     </view>
 
-    <!-- Chat area -->
+    <!-- Avatar mode -->
-    <scroll-view class="chat-area" scroll-y :scroll-into-view="scrollToId" :scroll-with-animation="true">
+    <view class="avatar-section" v-if="avatarMode">
+      <digital-human
+        ref="dhRef"
+        :text="aiSpeechText"
+        :audio-url="aiAudioUrl"
+        :auto-play="true"
+        @speaking-start="onAvatarSpeaking"
+        @speaking-end="onAvatarSilent"
+      />
+    </view>
+
+    <!-- Chat area (both modes) -->
+    <scroll-view class="chat-area" scroll-y :scroll-into-view="scrollToId" :scroll-with-animation="true" :class="{ 'chat-compact': avatarMode }">
       <view v-for="(msg, idx) in messages" :key="idx" :id="'msg-' + idx" class="msg-row" :class="msg.role">
         <view class="msg-bubble" :class="msg.role">
           <text>{{ msg.content }}</text>
         </view>
       </view>
 
-      <!-- Typing indicator -->
       <view class="msg-row ai" v-if="aiLoading">
         <view class="typing">
           <view class="typing-dot"></view>
@@ -38,7 +52,6 @@
       <view id="msg-bottom" style="height: 16rpx;"></view>
     </scroll-view>
 
-    <!-- Input bar -->
     <view class="input-bar" v-if="!isComplete">
       <view class="input-box">
         <textarea class="input-area" v-model="inputText" placeholder="输入你的回答..." :auto-height="true" :maxlength="2000" :disabled="aiLoading" @confirm="sendAnswer" />
@@ -47,10 +60,9 @@
         <text class="send-icon">➤</text>
       </view>
     </view>
-    <!-- AI 免责提示 -->
+
     <view class="disclaimer-bar" v-if="!isComplete">AI 生成内容仅供参考，请核实重要信息</view>
 
-    <!-- Complete -->
     <view class="complete-bar" v-else>
       <button class="cta-btn" @click="goResult">查看面试报告</button>
     </view>
@@ -60,7 +72,8 @@
 <script setup>
 import { ref, computed, onMounted, onBeforeUnmount, nextTick } from 'vue'
 import { onLoad } from '@dcloudio/uni-app'
-import { api } from '../../config'
+import { api, API_ENDPOINTS } from '../../config'
+import DigitalHuman from '../../components/digital-human.vue'
 
 const messages = ref([{ role: 'ai', content: '你好！我是 AI 面试官，请选择岗位开始模拟面试！' }])
 const inputText = ref('')
@@ -70,13 +83,19 @@ const answeredCount = ref(0)
 const isComplete = ref(false)
 const scrollToId = ref('')
 const position = ref('')
+const avatarMode = ref(false)
+const aiSpeechText = ref('')
+const aiAudioUrl = ref('')
+const isSpeaking = ref(false)
+const dhRef = ref(null)
+
 let timerSeconds = 0
 let timerInterval = null
 
 const progressPercent = computed(() => Math.min((answeredCount.value / 5) * 100, 100))
 const formatTime = computed(() => {
   const m = Math.floor(timerSeconds / 60); const s = timerSeconds % 60
-  return `${String(m).padStart(2,'0')}:${String(s).padStart(2,'0')}`
+  return `${String(m).padStart(2, '0')}:${String(s).padStart(2, '0')}`
 })
 const token = computed(() => uni.getStorageSync('token') || '')
 
@@ -88,13 +107,21 @@ onLoad((options) => {
   }
 })
 
-onMounted(() => { timerInterval = setInterval(() => timerSeconds++, 1000); if (token.value) startInterview() })
+onMounted(() => {
-onBeforeUnmount(() => clearInterval(timerInterval))
+  timerInterval = setInterval(() => timerSeconds++, 1000)
+  if (token.value) startInterview()
+})
+
+onBeforeUnmount(() => {
+  clearInterval(timerInterval)
+})
 
 const checkLogin = () => {
   if (!token.value) {
-    uni.showModal({ title: '请先登录', content: '登录后即可开始 AI 模拟面试', confirmText: '去登录',
+    uni.showModal({
-      success: (r) => { if (r.confirm) uni.navigateTo({ url: '/pages/login/login' }) } })
+      title: '请先登录', content: '登录后即可开始 AI 模拟面试', confirmText: '去登录',
+      success: (r) => { if (r.confirm) uni.navigateTo({ url: '/pages/login/login' }) },
+    })
     return false
   }
   return true
@@ -104,15 +131,27 @@ const startInterview = async () => {
   if (!checkLogin()) return
   aiLoading.value = true
   try {
-    const res = await uni.request({ url: api('/interview/create'), method: 'POST',
+    const res = await uni.request({
-      header: { 'Authorization': `Bearer ${token.value}`, 'Content-Type': 'application/json' }, data: { position: position.value } })
+      url: api('/interview/create'), method: 'POST',
+      header: { 'Authorization': `Bearer ${token.value}`, 'Content-Type': 'application/json' },
+      data: { position: position.value },
+    })
     if (res.statusCode === 200 && res.data) {
       interviewId.value = res.data.id
       messages.value = res.data.messages || messages.value
       answeredCount.value = res.data.questionCount || 0
+      // Speak first question in avatar mode
+      if (avatarMode.value && res.data.messages?.length) {
+        const last = res.data.messages[res.data.messages.length - 1]
+        if (last?.role === 'ai') await speakAiText(last.content)
+      }
+    }
+  } catch {
+    messages.value.push({ role: 'ai', content: '创建面试失败，请重试' })
+  } finally {
+    aiLoading.value = false
+    scrollToBottom()
   }
-  } catch { messages.value.push({ role: 'ai', content: '创建面试失败，请重试' }) }
-  finally { aiLoading.value = false; scrollToBottom() }
 }
 
 const sendAnswer = async () => {
@@ -122,32 +161,79 @@ const sendAnswer = async () => {
 
   const answer = inputText.value.trim()
   messages.value.push({ role: 'user', content: answer })
-  inputText.value = ''; scrollToBottom()
+  inputText.value = ''
+  scrollToBottom()
   aiLoading.value = true
+
   try {
-    const res = await uni.request({ url: api(`/interview/${interviewId.value}/answer`), method: 'POST',
+    const res = await uni.request({
-      header: { 'Authorization': `Bearer ${token.value}`, 'Content-Type': 'application/json' }, data: { answer } })
+      url: api(`/interview/${interviewId.value}/answer`), method: 'POST',
+      header: { 'Authorization': `Bearer ${token.value}`, 'Content-Type': 'application/json' },
+      data: avatarMode.value ? { answer, avatar: true } : { answer },
+    })
     if (res.statusCode === 200 && res.data?.messages) {
+      const aiMsg = res.data.messages.find(m => m.role === 'ai')
+      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
       }
-  } catch { messages.value.push({ role: 'ai', content: '回答提交失败，请重试' }) }
+      answeredCount.value = res.data.questionCount || answeredCount.value + 1
-  finally { aiLoading.value = false; scrollToBottom() }
+      if (res.data.ttsHash && !avatarMode.value) {
+        // Still got TTS but not in avatar mode, just show text
+      }
+    }
+  } catch {
+    messages.value.push({ role: 'ai', content: '回答提交失败，请重试' })
+  } finally {
+    aiLoading.value = false
+    scrollToBottom()
+  }
+}
+
+async function speakAiText(text, ttsHash) {
+  aiSpeechText.value = text
+  if (ttsHash) {
+    aiAudioUrl.value = api(API_ENDPOINTS.TTS.AUDIO(ttsHash))
+  } else {
+    try {
+      const synthRes = await uni.request({
+        url: api('/tts/synthesize'), method: 'POST',
+        header: { 'Content-Type': 'application/json' },
+        data: { text },
+      })
+      if (synthRes.statusCode === 200 && synthRes.data?.hash) {
+        aiAudioUrl.value = api(API_ENDPOINTS.TTS.AUDIO(synthRes.data.hash))
+      }
+    } catch {}
+  }
+}
+
+function onAvatarSpeaking() {
+  isSpeaking.value = true
+}
+
+function onAvatarSilent() {
+  isSpeaking.value = false
 }
 
 const goResult = () => uni.navigateTo({ url: `/pages/report/report?interviewId=${interviewId.value}` })
-const scrollToBottom = () => { nextTick(() => { scrollToId.value = ''; setTimeout(() => { scrollToId.value = 'msg-bottom' }, 100) }) }
+const scrollToBottom = () => {
+  nextTick(() => { scrollToId.value = ''; setTimeout(() => { scrollToId.value = 'msg-bottom' }, 100) })
+}
 
 const confirmExit = () => {
-  uni.showModal({ title: '退出面试', content: interviewId.value ? '确定退出吗？当前进度将不会保存。' : '确定退出？',
+  uni.showModal({
-    success: (r) => { if (r.confirm) uni.navigateBack() } })
+    title: '退出面试', content: interviewId.value ? '确定退出吗？当前进度将不会保存。' : '确定退出？',
+    success: (r) => { if (r.confirm) uni.navigateBack() },
+  })
 }
 </script>
 
 <style scoped>
 .page { height: 100vh; display: flex; flex-direction: column; background: #F8F9FC; }
 
-/* ===== Top Bar ===== */
 .topbar {
   background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-mid));
   padding-top: 20rpx; flex-shrink: 0;
@@ -167,10 +253,18 @@ const confirmExit = () => {
 .progress-track { height: 6rpx; background: rgba(255,255,255,0.2); border-radius: 3rpx; overflow: hidden; }
 .progress-fill { height: 100%; background: #FFFFFF; border-radius: 3rpx; transition: width 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94); }
 .topbar-timer { font-size: 20rpx; color: rgba(255,255,255,0.7); font-variant-numeric: tabular-nums; }
-.topbar-right { width: 60rpx; flex-shrink: 0; }
+.topbar-right { width: 60rpx; flex-shrink: 0; text-align: center; }
+.avatar-toggle { font-size: 36rpx; cursor: pointer; }
 
-/* ===== Chat ===== */
+/* Avatar section */
+.avatar-section {
+  background: linear-gradient(180deg, #EEF2FF 0%, #F8F9FC 100%);
+  flex-shrink: 0;
+}
+
+/* Chat */
 .chat-area { flex: 1; padding: 24rpx 20rpx; overflow-y: auto; }
+.chat-compact { max-height: 40vh; }
 .msg-row { display: flex; margin-bottom: 24rpx; }
 .msg-row.ai { justify-content: flex-start; }
 .msg-row.user { justify-content: flex-end; }
@@ -199,7 +293,7 @@ const confirmExit = () => {
 .typing-dot:nth-child(3) { animation-delay: 0.4s; }
 @keyframes blink { 0%,80%,100% { opacity: 0.3 } 40% { opacity: 1 } }
 
-/* ===== Input ===== */
+/* Input */
 .input-bar {
   background: #FFFFFF; padding: 16rpx 20rpx;
   padding-bottom: calc(16rpx + var(--safe-bottom));
@@ -217,7 +311,6 @@ const confirmExit = () => {
 .send-btn.disabled { background: var(--color-border); }
 .send-icon { font-size: 32rpx; color: #FFFFFF; transform: translateY(2rpx); }
 
-/* Complete */
 .complete-bar { background: #FFFFFF; padding: 20rpx 24rpx; padding-bottom: calc(20rpx + var(--safe-bottom)); }
 .cta-btn { width: 100%; height: 88rpx; line-height: 88rpx; background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-mid)); color: #FFFFFF; border-radius: var(--radius-md); font-size: 28rpx; font-weight: 600; border: none; }
 .disclaimer-bar { text-align: center; font-size: 20rpx; color: var(--color-text-tertiary); padding: 8rpx 24rpx; background: #FFFFFF; border-top: 1rpx solid var(--color-border); }

zhiyin-app/src/static/default-avatar.png

@@ -0,0 +1 @@
+placeholder - will use inline SVG fallback in component