适配讲解详情聚合接口

src/composables/useGlobalAudioPlayer.ts

@@ -259,7 +259,7 @@ const resume = () => {
   })
 }
 
-const switchLanguage = async (lang: AudioLanguage) => {
+const switchLanguage = async (lang: AudioLanguage, localAudio?: AudioItem | null) => {
   if (pendingLanguage.value) {
     return false
   }
@@ -291,6 +291,35 @@ const switchLanguage = async (lang: AudioLanguage) => {
   }
 
   try {
+    if (localAudio?.audioUrl) {
+      currentSource.value = nextSource
+      return await play(localAudio, {
+        source: nextSource,
+        retryOnError: retryOnError || undefined,
+        displayMode: preservedMode
+      })
+    }
+
+    if (localAudio) {
+      stopAudioElement()
+      currentSource.value = nextSource
+      currentAudio.value = {
+        ...localAudio,
+        audioUrl: '',
+        duration: 0,
+        language: lang
+      }
+      visible.value = true
+      displayMode.value = preservedMode
+      playing.value = false
+      loading.value = false
+      currentTime.value = 0
+      duration.value = 0
+      error.value = '当前语言暂无语音讲解'
+      showToast(error.value)
+      return false
+    }
+
     const playInfo = await audioPlayInfoRepository.getPlayInfo({
       targetType: source.targetType,
       targetId: source.targetId,

src/data/adapters/guideStopInfoAdapter.ts

@@ -42,11 +42,31 @@ export interface BackendGuideStopInfo {
   hasText?: boolean
   supportedLanguages?: string[] | null
   audioStatus?: string | null
+  languageVariants?: BackendGuideStopLanguageVariant[] | null
   reason?: string | null
   linkedExhibitCount?: number | string | null
   isSharedStop?: boolean | null
 }
 
+export interface BackendGuideStopLanguageVariant {
+  lang?: string | null
+  enabled?: boolean | null
+  playable?: boolean | null
+  audioStatus?: string | null
+  playUrl?: string | null
+  duration?: number | string | null
+  format?: string | null
+  audioId?: string | number | null
+  narrationTier?: 'STANDARD' | 'EXTENDED' | string | null
+  hasText?: boolean | null
+  textAvailable?: boolean | null
+  text?: string | null
+  textLength?: number | string | null
+  textHash?: string | null
+  fallback?: boolean | null
+  reason?: string | null
+}
+
 export interface BackendAudioPlayInfo {
   playable?: boolean
   targetType?: string | null
@@ -90,6 +110,25 @@ export interface GuideStopLinkedExhibit {
   sortOrder?: number
 }
 
+export interface GuideStopLanguageVariant {
+  lang: GuideAudioLanguage
+  enabled: boolean
+  playable: boolean
+  audioStatus: 'READY' | 'MISSING' | string
+  playUrl?: string
+  duration?: number
+  format?: string
+  audioId?: string
+  narrationTier?: 'STANDARD' | 'EXTENDED'
+  hasText: boolean
+  textAvailable: boolean
+  text?: string
+  textLength?: number
+  textHash?: string
+  fallback: boolean
+  reason?: string
+}
+
 export interface GuideStopInfo {
   available: boolean
   targetType: AudioPlayTargetType
@@ -112,6 +151,7 @@ export interface GuideStopInfo {
   hasAudio: boolean
   hasText: boolean
   supportedLanguages: GuideAudioLanguage[]
+  languageVariants: Record<GuideAudioLanguage, GuideStopLanguageVariant>
   audioStatus: 'READY' | 'MISSING' | string
   reason?: string
   linkedExhibitCount?: number
@@ -177,16 +217,57 @@ export const normalizeGuideAudioLanguage = (
   return 'zh-CN'
 }
 
+const isSupportedGuideAudioLanguage = (value: string | null | undefined) => (
+  ['zh', 'zh-cn', 'en', 'en-us', 'yue', 'yue-cn', 'yue-hk'].includes(value?.trim().toLowerCase() || '')
+)
+
 const normalizeSupportedLanguages = (languages: string[] | null | undefined): GuideAudioLanguage[] => (
   Array.from(new Set((languages || [])
-    .map((language) => {
+    .filter(isSupportedGuideAudioLanguage)
-      const normalized = language?.trim().toLowerCase()
+    .map(normalizeGuideAudioLanguage))) as GuideAudioLanguage[]
-      if (!['zh', 'zh-cn', 'en', 'en-us', 'yue', 'yue-cn', 'yue-hk'].includes(normalized)) {
+)
-        return null
+
-      }
+const normalizeLanguageVariants = (
-      return normalizeGuideAudioLanguage(language)
+  variants: BackendGuideStopLanguageVariant[] | null | undefined
-    })
+): Record<GuideAudioLanguage, GuideStopLanguageVariant> => {
-    .filter(Boolean))) as GuideAudioLanguage[]
+  const normalizedVariants = {} as Record<GuideAudioLanguage, GuideStopLanguageVariant>
+
+  ;(variants || []).forEach((variant) => {
+    if (!isSupportedGuideAudioLanguage(variant.lang)) return
+
+    const lang = normalizeGuideAudioLanguage(variant.lang)
+    const playUrl = normalizeSameOriginPublicUrl(variant.playUrl) || undefined
+    const playable = variant.playable === true && Boolean(playUrl)
+    const text = variant.text?.trim() || undefined
+    const textAvailable = variant.textAvailable === true || Boolean(text)
+
+    normalizedVariants[lang] = {
+      lang,
+      enabled: variant.enabled === true,
+      playable,
+      audioStatus: variant.audioStatus || (playable ? 'READY' : 'MISSING'),
+      playUrl,
+      duration: normalizeNumber(variant.duration),
+      format: variant.format?.trim() || undefined,
+      audioId: stringifyId(variant.audioId) || undefined,
+      narrationTier: normalizeNarrationTier(variant.narrationTier),
+      hasText: variant.hasText === true || textAvailable,
+      textAvailable,
+      text,
+      textLength: normalizeNumber(variant.textLength),
+      textHash: variant.textHash?.trim() || undefined,
+      fallback: variant.fallback === true,
+      reason: variant.reason?.trim() || undefined
+    }
+  })
+
+  return normalizedVariants
+}
+
+const supportedLanguagesFromVariants = (variants: Record<GuideAudioLanguage, GuideStopLanguageVariant>) => (
+  (Object.values(variants) as GuideStopLanguageVariant[])
+    .filter((variant) => variant.enabled && (variant.playable || variant.textAvailable))
+    .map((variant) => variant.lang)
 )
 
 const parseGalleryUrls = (value: BackendGuideStopInfo['galleryUrls'] | BackendGuideStopLinkedExhibit['galleryUrls']) => {
@@ -255,6 +336,8 @@ export const toGuideStopInfo = (
   const coverImageUrl = canUseStopImages
     ? normalizeSameOriginPublicUrl(source.coverImageUrl) || undefined
     : undefined
+  const languageVariants = normalizeLanguageVariants(source.languageVariants)
+  const supportedLanguages = supportedLanguagesFromVariants(languageVariants)
 
   return {
     available: source.available === true,
@@ -277,7 +360,10 @@ export const toGuideStopInfo = (
     playTargetId,
     hasAudio: source.hasAudio === true,
     hasText: source.hasText === true,
-    supportedLanguages: normalizeSupportedLanguages(source.supportedLanguages),
+    supportedLanguages: supportedLanguages.length
+      ? supportedLanguages
+      : normalizeSupportedLanguages(source.supportedLanguages),
+    languageVariants,
     audioStatus: source.audioStatus || 'MISSING',
     reason: source.reason || undefined,
     linkedExhibitCount: normalizeNumber(source.linkedExhibitCount),

src/domain/museum.ts

@@ -182,10 +182,21 @@ export interface MuseumExhibit {
   audioVariants?: Record<string, {
     title?: string
     text?: string
+    textAvailable?: boolean
+    textLength?: number
+    textHash?: string
     audioUrl?: string
     audioDuration?: number
+    format?: string
+    audioId?: string
+    narrationTier?: 'STANDARD' | 'EXTENDED'
     hasText?: boolean
+    enabled?: boolean
+    playable?: boolean
     available?: boolean
+    audioStatus?: string
+    fallback?: boolean
+    reason?: string
   }>
   imageStatus?: string
   imageSource?: string

src/pages/exhibit/detail.vue

@@ -160,7 +160,8 @@ import {
   type ExplainDetailPageViewModel
 } from '@/view-models/explainViewModels'
 import type {
-  AudioPlayTargetType
+  AudioPlayTargetType,
+  MuseumExhibit
 } from '@/domain/museum'
 import type {
   AudioLanguage
@@ -193,6 +194,7 @@ const defaultDetail: ExplainDetailPageViewModel = {
 }
 
 const exhibit = ref<ExplainDetailPageViewModel>(defaultDetail)
+const detailSource = ref<MuseumExhibit | null>(null)
 const detailState = ref<'idle' | 'loading' | 'ready' | 'missing' | 'error'>('idle')
 const detailStateMessage = ref('请检查链接后重试。')
 const globalAudioPlayer = useGlobalAudioPlayer()
@@ -201,7 +203,6 @@ const resolvedHallId = ref('')
 const retryingAudio = ref(false)
 const languageSwitchLoading = ref(false)
 const selectedAudioLanguage = ref<AudioLanguage>('zh-CN')
-let languageSwitchSequence = 0
 const detailEntryRequest = ref<{
   exhibitId: string
   targetType?: AudioPlayTargetType
@@ -217,16 +218,6 @@ const detailTextByLanguage = ref<Record<AudioLanguage, string>>({
   'yue-HK': '当前语言暂无讲解词。',
   'en-US': 'English narration text is not available yet.'
 })
-const detailTextLoadingByLanguage = ref<Record<AudioLanguage, boolean>>({
-  'zh-CN': false,
-  'yue-HK': false,
-  'en-US': false
-})
-const detailTextLoadedByLanguage = ref<Record<AudioLanguage, boolean>>({
-  'zh-CN': false,
-  'yue-HK': false,
-  'en-US': false
-})
 // 讲解详情页位置入口暂未开放，避免误导用户进入位置预览流程。
 const isLocationActionVisible = false
 const shouldUseHostNavigation = computed(() => isEmbeddedInWechatMiniProgram())
@@ -416,63 +407,22 @@ const applyDetailText = (lang: AudioLanguage, text?: string) => {
     ...detailTextByLanguage.value,
     [lang]: normalized || fallbackTextForLanguage(lang)
   }
-  detailTextLoadedByLanguage.value = {
-    ...detailTextLoadedByLanguage.value,
-    [lang]: true
-  }
 }
 
-const buildTextSourceFromViewModel = (viewModel: ExplainDetailPageViewModel) => ({
+const hydrateDetailTexts = (source: MuseumExhibit) => {
-  id: viewModel.id,
+  const nextTexts: Record<AudioLanguage, string> = {
-  name: viewModel.title,
+    'zh-CN': fallbackTextForLanguage('zh-CN'),
-  hallId: viewModel.hallId,
+    'yue-HK': fallbackTextForLanguage('yue-HK'),
-  hallName: viewModel.hallName,
+    'en-US': fallbackTextForLanguage('en-US')
-  floorId: viewModel.floorId,
-  floorLabel: viewModel.floorLabel,
-  image: viewModel.coverImages[0],
-  description: viewModel.summary,
-  guideText: viewModel.summary,
-  audioLanguage: viewModel.audio.language,
-  audioHasText: viewModel.audio.hasText,
-  playTargetType: viewModel.audio.playTargetType,
-  playTargetId: viewModel.audio.playTargetId
-})
-
-const loadFullDetailTextForLanguage = async (
-  request: NonNullable<typeof detailEntryRequest.value>,
-  lang: AudioLanguage,
-  preferredViewModel?: ExplainDetailPageViewModel
-) => {
-  detailTextLoadingByLanguage.value = {
-    ...detailTextLoadingByLanguage.value,
-    [lang]: true
   }
 
-  try {
+  ;(['zh-CN', 'yue-HK', 'en-US'] as AudioLanguage[]).forEach((lang) => {
-    const viewModel = preferredViewModel || toExplainDetailPageViewModel(await explainUseCase.enterExplainDetail({
+    const variant = source.audioVariants?.[lang]
-      ...request,
+    const text = variant?.text || (source.audioLanguage === lang ? source.guideText : undefined)
-      lang
+    nextTexts[lang] = text?.trim() || fallbackTextForLanguage(lang)
-    }))
+  })
 
-    if (viewModel.audio.hasText) {
+  detailTextByLanguage.value = nextTexts
-      const selection = await explainUseCase.loadExplainDetailText(buildTextSourceFromViewModel(viewModel))
-      if (selection.available) {
-        const nextViewModel = toExplainDetailPageViewModel(selection.exhibit)
-        applyDetailText(lang, nextViewModel.body || nextViewModel.summary)
-        return
-      }
-    }
-
-    applyDetailText(lang, viewModel.body || viewModel.summary)
-  } catch (error) {
-    console.warn('讲解正文加载失败:', lang, error)
-    applyDetailText(lang)
-  } finally {
-    detailTextLoadingByLanguage.value = {
-      ...detailTextLoadingByLanguage.value,
-      [lang]: false
-    }
-  }
 }
 
 const loadExplainDetail = async (
@@ -485,6 +435,8 @@ const loadExplainDetail = async (
     lang
   })
 
+  detailSource.value = exhibitData
+  hydrateDetailTexts(exhibitData)
   exhibit.value = toExplainDetailPageViewModel(exhibitData)
   const resolvedLanguage = resolveSupportedDetailLanguage(lang)
   selectedAudioLanguage.value = resolvedLanguage
@@ -494,12 +446,13 @@ const loadExplainDetail = async (
   }
 
   if (resolvedLanguage !== lang) {
+    const localizedExhibit = explainUseCase.selectExplainDetailLanguage(exhibitData, resolvedLanguage)
+    detailSource.value = localizedExhibit
+    exhibit.value = toExplainDetailPageViewModel(localizedExhibit)
+    selectedAudioLanguage.value = resolvedLanguage
     replaceDetailRouteLanguage(resolvedLanguage)
-    await loadExplainDetail(request, resolvedLanguage)
-    return
   }
 
-  void loadFullDetailTextForLanguage(request, resolvedLanguage, exhibit.value)
   detailState.value = 'ready'
 }
 
@@ -618,9 +571,7 @@ const splitDetailTextIntoParagraphs = (text: string): string[] => {
 
 const currentDetailText = computed(() => detailTextFor(selectedAudioLanguage.value))
 const currentDetailParagraphs = computed(() => splitDetailTextIntoParagraphs(currentDetailText.value))
-const currentDetailTextLoading = computed(() => (
+const currentDetailTextLoading = computed(() => languageSwitchLoading.value)
-  languageSwitchLoading.value || detailTextLoadingByLanguage.value[selectedAudioLanguage.value]
-))
 const detailLoadingMessage = computed(() => (
   languageSwitchLoading.value
     ? `正在切换到${audioLanguageLabel(selectedAudioLanguage.value)}`
@@ -648,62 +599,40 @@ const handleLanguageChange = async (lang: AudioLanguage, options: { syncAudio?:
     || (supportedDetailLanguages.value.length > 0 && !supportedDetailLanguages.value.includes(lang))
   ) return
 
+  const source = detailSource.value
+  if (!source) return
+
   const shouldSyncAudio = options.syncAudio !== false && isCurrentDetailAudioTarget.value
-  const request = detailEntryRequest.value
+  const localizedExhibit = explainUseCase.selectExplainDetailLanguage(source, lang)
-  const requestSequence = ++languageSwitchSequence
+  const localizedViewModel = toExplainDetailPageViewModel(localizedExhibit)
   selectedAudioLanguage.value = lang
+  detailSource.value = localizedExhibit
+  exhibit.value = localizedViewModel
+  applyDetailText(lang, localizedExhibit.audioText || localizedExhibit.guideText || localizedViewModel.body)
   replaceDetailRouteLanguage(lang)
+
+  if (localizedExhibit.hallId) {
+    resolvedHallId.value = localizedExhibit.hallId
+  }
+
+  if (!shouldSyncAudio || globalAudioPlayer.currentSource.value?.lang === lang) return
+
   languageSwitchLoading.value = true
-
-  const audioSwitch = shouldSyncAudio && globalAudioPlayer.currentSource.value?.lang !== lang
-    ? globalAudioPlayer.switchLanguage(lang)
-    : Promise.resolve(true)
-
   try {
-    if (!request) {
+    const nextAudio = localizedViewModel.audio.url
-      applyDetailText(lang)
+      ? {
-      await audioSwitch
+        id: `stop-${localizedViewModel.audio.playTargetType || 'ITEM'}-${localizedViewModel.audio.playTargetId || localizedViewModel.id}-${lang}`,
-      return
+        name: localizedViewModel.title,
-    }
+        audioUrl: localizedViewModel.audio.url,
-
+        image: heroImage.value,
-    const exhibitData = await explainUseCase.enterExplainDetail({
+        duration: localizedViewModel.audio.duration,
-      ...request,
-      lang
-    })
-    if (requestSequence !== languageSwitchSequence) return
-
-    const nextViewModel = toExplainDetailPageViewModel(exhibitData)
-    exhibit.value = nextViewModel
-    if (exhibitData.hallId) {
-      resolvedHallId.value = exhibitData.hallId
-    }
-
-    void loadFullDetailTextForLanguage(request, lang, nextViewModel)
-    await audioSwitch
-  } catch (error) {
-    if (requestSequence !== languageSwitchSequence) return
-
-    console.warn('讲解语言切换失败:', lang, error)
-    exhibit.value = {
-      ...exhibit.value,
-      audio: {
-        ...exhibit.value.audio,
-        status: 'unavailable',
-        url: undefined,
-        duration: undefined,
         language: lang,
-        unavailableReason: '讲解服务暂不可用，请稍后重试'
+        supportedLanguages: supportedDetailLanguages.value
       }
-    }
+      : null
-    applyDetailText(lang)
+    await globalAudioPlayer.switchLanguage(lang, nextAudio)
-    uni.showToast({
-      title: '讲解语言切换失败，请稍后重试',
-      icon: 'none'
-    })
   } finally {
-    if (requestSequence === languageSwitchSequence) {
+    languageSwitchLoading.value = false
-      languageSwitchLoading.value = false
-    }
   }
 }
 

src/repositories/AudioPlayInfoRepository.ts

@@ -72,6 +72,7 @@ const reasonMessageMap: Record<string, string> = {
   NO_GUIDE_STOP: '该展品暂未配置语音讲解',
   NO_GUIDE_CONTENT: '该目标暂无讲解内容',
   NO_TEXT: '当前语言暂无讲解词',
+  LANGUAGE_DISABLED: '该语言暂未开放',
   UNSUPPORTED_LANGUAGE: '不支持该语言',
   UNSUPPORTED_TARGET_TYPE: '该目标类型暂不支持播放',
   TARGET_NOT_FOUND: '该讲解音频暂不可用，当前提供图文讲解',

src/usecases/explainUseCase.ts

@@ -183,21 +183,29 @@ export class ExplainUseCase {
       }
     }
 
+    const playable = (variant.playable ?? variant.available) === true && Boolean(variant.audioUrl)
+    const textAvailable = variant.textAvailable ?? (variant.hasText === true || Boolean(variant.text))
+    const guideText = variant.text
+      || (language === 'yue-HK' ? mandarinText : undefined)
+      || `${this.languageLabel(language)}讲解词暂未配置。`
+
     return {
       ...exhibit,
       guideTitle: variant.title || exhibit.guideTitle,
-      guideText: language === 'yue-HK'
+      guideText,
-        ? mandarinText || '当前讲解词暂未配置。'
+      audioUrl: playable ? variant.audioUrl : undefined,
-        : variant.text || `${this.languageLabel(language)}讲解词暂未配置。`,
-      audioUrl: variant.audioUrl,
       audioDuration: variant.audioDuration,
       audioLanguage: language,
-      audioHasText: language === 'yue-HK' ? Boolean(mandarinText) : variant.hasText === true,
+      audioHasText: textAvailable,
-      audioAvailable: variant.available === true && Boolean(variant.audioUrl),
+      audioText: variant.text || undefined,
-      audioStatus: variant.available && variant.audioUrl ? 'READY' : 'MISSING',
+      audioTextLength: variant.textLength,
-      audioUnavailableReason: variant.available && variant.audioUrl
+      audioTextHash: variant.textHash,
+      audioNarrationTier: variant.narrationTier,
+      audioAvailable: playable,
+      audioStatus: variant.audioStatus || (playable ? 'READY' : 'MISSING'),
+      audioUnavailableReason: playable
         ? undefined
-        : `当前讲解暂无${this.languageLabel(language)}音频`,
+        : audioReasonToText(variant.reason || 'NO_PUBLISHED_AUDIO'),
       supportedLanguages
     }
   }
@@ -213,7 +221,27 @@ export class ExplainUseCase {
       : undefined
     const description = stopInfo.description || fallback?.description || '该讲解暂无简介。'
     const audioTarget = this.resolveStopInfoAudioTarget(stopInfo)
-    const audioAvailable = stopInfo.audioStatus === 'READY'
+    const audioVariants = Object.fromEntries(Object.values(stopInfo.languageVariants).map((variant) => [variant.lang, {
+      title: stopInfo.title,
+      text: variant.text,
+      textAvailable: variant.textAvailable,
+      textLength: variant.textLength,
+      textHash: variant.textHash,
+      audioUrl: variant.playUrl,
+      audioDuration: variant.duration,
+      format: variant.format,
+      audioId: variant.audioId,
+      narrationTier: variant.narrationTier,
+      hasText: variant.hasText,
+      enabled: variant.enabled,
+      playable: variant.playable,
+      available: variant.playable,
+      audioStatus: variant.audioStatus,
+      fallback: variant.fallback,
+      reason: variant.reason
+    }]))
+    const currentVariant = audioVariants[stopInfo.lang]
+    const audioAvailable = currentVariant?.playable === true && Boolean(currentVariant.audioUrl)
 
     return {
       ...(fallback || {}),
@@ -235,21 +263,22 @@ export class ExplainUseCase {
       size: fallback?.size,
       tags: fallback?.tags,
       guideTitle: stopInfo.title || fallback?.guideTitle,
-      guideText: stopInfo.description || fallback?.guideText || fallback?.description,
+      guideText: currentVariant?.text || stopInfo.description || fallback?.guideText || fallback?.description,
-      audioUrl: undefined,
+      audioUrl: audioAvailable ? currentVariant?.audioUrl : undefined,
-      audioDuration: undefined,
+      audioDuration: currentVariant?.audioDuration,
       audioLanguage: stopInfo.lang,
-      audioHasText: stopInfo.hasText,
+      audioHasText: currentVariant?.textAvailable || stopInfo.hasText,
-      audioText: undefined,
+      audioText: currentVariant?.text,
-      audioTextLength: undefined,
+      audioTextLength: currentVariant?.textLength,
-      audioTextHash: undefined,
+      audioTextHash: currentVariant?.textHash,
-      audioNarrationTier: undefined,
+      audioNarrationTier: currentVariant?.narrationTier,
       audioUnavailableReason: audioAvailable
         ? undefined
-        : audioReasonToText(stopInfo.reason || (stopInfo.audioStatus === 'MISSING' ? 'NO_PUBLISHED_AUDIO' : undefined)),
+        : audioReasonToText(currentVariant?.reason || stopInfo.reason || (stopInfo.audioStatus === 'MISSING' ? 'NO_PUBLISHED_AUDIO' : undefined)),
       audioAvailable,
-      audioStatus: stopInfo.audioStatus,
+      audioStatus: currentVariant?.audioStatus || stopInfo.audioStatus,
       supportedLanguages: stopInfo.supportedLanguages,
+      audioVariants,
       imageStatus: stopInfo.imageStatus,
       imageSource: stopInfo.imageSource,
       galleryUrls: stopInfo.imageStatus === 'READY' ? stopInfo.galleryUrls : [],
@@ -434,6 +463,10 @@ export class ExplainUseCase {
     throw stopInfoResult.error || new Error('讲解详情加载失败')
   }
 
+  selectExplainDetailLanguage(exhibit: MuseumExhibit, language: AudioLanguage) {
+    return this.applyLanguageVariant(exhibit, language)
+  }
+
   async loadExplainDetailText(exhibit: MuseumExhibit): Promise<ExplainTextSelection> {
     const targetType = exhibit.playTargetType || 'ITEM'
     const targetId = exhibit.playTargetId || exhibit.id

tests/unit/ExhibitDetailAudioFirst.spec.ts

@@ -9,6 +9,7 @@ const mocks = vi.hoisted(() => ({
   onHideHandler: null as null | (() => void),
   onUnloadHandler: null as null | (() => void),
   enterExplainDetail: vi.fn(),
+  selectExplainDetailLanguage: vi.fn(),
   loadExplainDetailText: vi.fn(),
   selectAudioForExplainDetail: vi.fn(),
   play: vi.fn(),
@@ -43,6 +44,7 @@ vi.mock('@dcloudio/uni-app', () => ({
 vi.mock('@/usecases/explainUseCase', () => ({
   explainUseCase: {
     enterExplainDetail: mocks.enterExplainDetail,
+    selectExplainDetailLanguage: mocks.selectExplainDetailLanguage,
     loadExplainDetailText: mocks.loadExplainDetailText,
     selectAudioForExplainDetail: mocks.selectAudioForExplainDetail
   }
@@ -110,6 +112,10 @@ describe('讲解详情音频优先布局', () => {
     audioState.currentTime.value = 0
     audioState.duration.value = 0
     mocks.enterExplainDetail.mockResolvedValue(exhibit)
+    mocks.selectExplainDetailLanguage.mockImplementation((source, lang) => ({
+      ...source,
+      audioLanguage: lang
+    }))
     mocks.loadExplainDetailText.mockResolvedValue({ available: false })
     mocks.selectAudioForExplainDetail.mockResolvedValue({
       playable: true,
@@ -191,7 +197,7 @@ describe('讲解详情音频优先布局', () => {
     expect(wrapper.find('.detail-language-bar').exists()).toBe(false)
   })
 
-  it('深链语言不受支持时回退至中文并规范化地址', async () => {
+  it('深链语言不受支持时本地回退至中文并规范化地址', async () => {
     mocks.enterExplainDetail.mockImplementation(async (request: { lang: string }) => ({
       ...exhibit,
       audioLanguage: request.lang,
@@ -205,8 +211,9 @@ describe('讲解详情音频优先布局', () => {
     await mocks.onLoadHandler?.({ id: exhibit.id, lang: 'en-US', targetType: 'STOP', targetId: 'stop-1' })
     await flushPromises()
 
-    expect(mocks.enterExplainDetail).toHaveBeenNthCalledWith(1, expect.objectContaining({ lang: 'en-US' }))
+    expect(mocks.enterExplainDetail).toHaveBeenCalledTimes(1)
-    expect(mocks.enterExplainDetail).toHaveBeenNthCalledWith(2, expect.objectContaining({ lang: 'zh-CN' }))
+    expect(mocks.enterExplainDetail).toHaveBeenCalledWith(expect.objectContaining({ lang: 'en-US' }))
+    expect(mocks.selectExplainDetailLanguage).toHaveBeenCalledWith(expect.any(Object), 'zh-CN')
     expect(wrapper.get('.language-option').classes()).toContain('active')
     expect(wrapper.get('.language-option-text').text()).toBe('中文')
     expect(replaceState).toHaveBeenCalledWith(null, '', expect.stringContaining('lang=zh-CN'))
@@ -244,6 +251,34 @@ describe('讲解详情音频优先布局', () => {
     expect(wrapper.get('.detail-audio-play').attributes('disabled')).toBeDefined()
   })
 
+  it('切换语言时使用初次详情响应中的变体，不重复请求详情或正文', async () => {
+    const localizedExhibit = {
+      ...exhibit,
+      guideText: '粤语通道使用普通话文案。',
+      audioUrl: '/assets/astrolabe-yue.mp3',
+      audioDuration: 83,
+      audioLanguage: 'yue-HK',
+      audioStatus: 'READY',
+      audioHasText: true,
+      supportedLanguages: ['zh-CN', 'yue-HK', 'en-US']
+    }
+    mocks.selectExplainDetailLanguage.mockReturnValue(localizedExhibit)
+    const wrapper = mount(ExhibitDetail, {
+      global: { stubs: { GuidePageFrame: GuidePageFrameStub } }
+    })
+
+    await mocks.onLoadHandler?.({ id: exhibit.id, lang: 'en-US', targetType: 'STOP', targetId: 'stop-1' })
+    await flushPromises()
+    await wrapper.findAll('.language-option').find((node) => node.text() === '粤语')?.trigger('tap')
+    await flushPromises()
+
+    expect(mocks.enterExplainDetail).toHaveBeenCalledTimes(1)
+    expect(mocks.loadExplainDetailText).not.toHaveBeenCalled()
+    expect(mocks.selectExplainDetailLanguage).toHaveBeenCalledWith(expect.any(Object), 'yue-HK')
+    expect(wrapper.get('.section-text').text()).toContain('粤语通道使用普通话文案')
+    expect(wrapper.get('.detail-audio-subtitle').text()).toContain('粤语')
+  })
+
   it('无音频时禁用播放按钮并显示原因', async () => {
     mocks.enterExplainDetail.mockResolvedValue({
       ...exhibit,

tests/unit/ExplainUseCase.spec.ts

@@ -25,6 +25,7 @@ const createStopInfo = (overrides: Partial<GuideStopInfo> = {}): GuideStopInfo =
   hasAudio: false,
   hasText: false,
   supportedLanguages: [],
+  languageVariants: {},
   audioStatus: 'MISSING',
   ...overrides
 })
@@ -99,4 +100,60 @@ describe('ExplainUseCase stop image policy', () => {
     expect(detail.image).toBe('/guide-stop.jpg')
     expect(detail.galleryUrls).toEqual(['/guide-stop-gallery.jpg'])
   })
+
+  it('uses stop-info language variants locally without requesting play-info or text-info', async () => {
+    const audio = {
+      getStopInfo: vi.fn().mockResolvedValue(createStopInfo({
+        hasAudio: true,
+        hasText: true,
+        supportedLanguages: ['zh-CN', 'yue-HK'],
+        languageVariants: {
+          'zh-CN': {
+            lang: 'zh-CN',
+            enabled: true,
+            playable: true,
+            playUrl: '/audio/zh.mp3',
+            duration: 50,
+            hasText: true,
+            textAvailable: true,
+            text: '普通话讲解词',
+            fallback: false,
+            audioStatus: 'READY'
+          },
+          'yue-HK': {
+            lang: 'yue-HK',
+            enabled: true,
+            playable: true,
+            playUrl: '/audio/yue.mp3',
+            duration: 52,
+            hasText: true,
+            textAvailable: true,
+            text: '粤语通道使用普通话文案',
+            fallback: false,
+            audioStatus: 'READY'
+          }
+        } as GuideStopInfo['languageVariants']
+      })),
+      getPlayInfo: vi.fn(),
+      getTextInfo: vi.fn()
+    } as unknown as AudioPlayInfoRepository
+    const explain = {
+      getExhibitById: vi.fn(),
+      listExplainExhibits: vi.fn()
+    } as unknown as ExplainRepository
+    const useCase = new ExplainUseCase(explain, audio)
+
+    const detail = await useCase.enterExplainDetail({
+      exhibitId: 'stop-1', targetType: 'STOP', targetId: 'stop-1', lang: 'zh-CN'
+    })
+    const cantonese = useCase.selectExplainDetailLanguage(detail, 'yue-HK')
+
+    expect(detail.guideText).toBe('普通话讲解词')
+    expect(detail.audioUrl).toBe('/audio/zh.mp3')
+    expect(cantonese.guideText).toBe('粤语通道使用普通话文案')
+    expect(cantonese.audioUrl).toBe('/audio/yue.mp3')
+    expect(cantonese.audioDuration).toBe(52)
+    expect((audio as any).getPlayInfo).not.toHaveBeenCalled()
+    expect((audio as any).getTextInfo).not.toHaveBeenCalled()
+  })
 })

tests/unit/GlobalAudioPlayerLanguage.spec.ts

@@ -35,7 +35,36 @@ describe('全局讲解播放器语言切换', () => {
     vi.unstubAllGlobals()
   })
 
-  it('切换到粤语时立即中断旧音频，并使用 yue-HK 播放地址', async () => {
+  it('详情页提供语言变体播放地址时直接切换，不请求 play-info', async () => {
+    await player.play({
+      id: 'mandarin-audio',
+      name: '测试讲解',
+      audioUrl: '/museum-assets/audio/mandarin.mp3',
+      language: 'zh-CN'
+    }, {
+      source: {
+        targetType: 'STOP',
+        targetId: '1823450596800289',
+        lang: 'zh-CN'
+      }
+    })
+
+    await expect(player.switchLanguage('yue-HK', {
+      id: 'cantonese-audio',
+      name: '测试讲解',
+      audioUrl: '/museum-assets/audio/cantonese.mp3',
+      language: 'yue-HK'
+    })).resolves.toBe(true)
+
+    expect(repositoryMocks.getPlayInfo).not.toHaveBeenCalled()
+    expect(player.currentSource.value?.lang).toBe('yue-HK')
+    expect(player.currentAudio.value).toEqual(expect.objectContaining({
+      language: 'yue-HK',
+      audioUrl: '/museum-assets/audio/cantonese.mp3'
+    }))
+  })
+
+  it('未提供详情语言变体时保留 play-info 刷新回退', async () => {
     repositoryMocks.getPlayInfo.mockResolvedValue({
       playable: true,
       targetType: 'STOP',

tests/unit/GuideStopInfoAdapter.spec.ts

@@ -0,0 +1,78 @@
+import { describe, expect, it } from 'vitest'
+import { toGuideStopInfo } from '@/data/adapters/guideStopInfoAdapter'
+
+describe('guide stop-info adapter', () => {
+  it('normalizes aggregated language variants and exposes only displayable languages', () => {
+    const result = toGuideStopInfo({
+      available: true,
+      targetType: 'STOP',
+      targetId: '9001',
+      lang: 'zh-CN',
+      imageStatus: 'READY',
+      coverImageUrl: '/museum-assets/cover.webp',
+      languageVariants: [
+        {
+          lang: 'zh',
+          enabled: true,
+          playable: true,
+          audioStatus: 'READY',
+          playUrl: '/museum-assets/audio/zh.mp3',
+          duration: '50',
+          audioId: 12,
+          hasText: true,
+          textAvailable: true,
+          text: '普通话讲解词',
+          textLength: '6',
+          textHash: 'zh-hash'
+        },
+        {
+          lang: 'yue-HK',
+          enabled: true,
+          playable: false,
+          audioStatus: 'MISSING',
+          textAvailable: true,
+          text: '粤语使用普通话文案',
+          reason: 'NO_PUBLISHED_AUDIO'
+        },
+        {
+          lang: 'en-US',
+          enabled: false,
+          playable: true,
+          playUrl: '/museum-assets/audio/en.mp3'
+        }
+      ]
+    }, {
+      targetType: 'STOP',
+      targetId: '9001',
+      lang: 'zh-CN'
+    })
+
+    expect(result.supportedLanguages).toEqual(['zh-CN', 'yue-HK'])
+    expect(result.languageVariants['zh-CN']).toMatchObject({
+      playable: true,
+      playUrl: '/museum-assets/audio/zh.mp3',
+      duration: 50,
+      audioId: '12',
+      text: '普通话讲解词',
+      textLength: 6
+    })
+    expect(result.languageVariants['yue-HK']).toMatchObject({
+      playable: false,
+      textAvailable: true,
+      reason: 'NO_PUBLISHED_AUDIO'
+    })
+  })
+
+  it('keeps supportedLanguages as the compatibility fallback when variants are absent', () => {
+    const result = toGuideStopInfo({
+      supportedLanguages: ['zh-CN', 'en-US']
+    }, {
+      targetType: 'STOP',
+      targetId: '9001',
+      lang: 'zh-CN'
+    })
+
+    expect(result.supportedLanguages).toEqual(['zh-CN', 'en-US'])
+    expect(result.languageVariants).toEqual({})
+  })
+})