feat: 临时改造讲解页方案 B 链路

接入展厅列表、展厅讲解点分组生成临时业务单元，并迁移讲解详情播放正文到新接口链路。

src/view-models/explainViewModels.ts

@@ -1,4 +1,5 @@
 import type {
+  AudioPlayTargetType,
   GuideLocationResolution,
   MuseumExhibit,
   MuseumHall,
@@ -28,6 +29,8 @@ export interface ExplainCardViewModel {
   languageLabel?: string
   audioStatus: ExplainAudioStatus
   audioStatusText: string
+  playTargetType?: AudioPlayTargetType
+  playTargetId?: string
   badges: string[]
   progress?: number
   poiId?: string
@@ -52,7 +55,19 @@ export interface ExplainDetailPageViewModel {
     durationLabel?: string
     language?: string
     unavailableReason?: string
+    playTargetType?: AudioPlayTargetType
+    playTargetId?: string
+    hasText?: boolean
+    statusText?: string
   }
+  imageStatus?: string
+  linkedExhibits?: Array<{
+    id: string
+    name: string
+    nameEn?: string
+    exhibitCode?: string
+    coverImageUrl?: string
+  }>
   chapters: Array<{
     id: string
     title: string
@@ -112,10 +127,14 @@ const languageLabelFor = (language?: string) => {
   return language || undefined
 }
 
-const hasPlayableAudioUrl = (exhibit: MuseumExhibit) => Boolean(exhibit.audioUrl?.trim())
+const isAudioReady = (exhibit: MuseumExhibit) => (
+  exhibit.audioStatus === 'READY'
+  || exhibit.audioAvailable === true
+  || Boolean(exhibit.audioUrl?.trim())
+)
 
 export const toExplainCardViewModel = (exhibit: MuseumExhibit): ExplainCardViewModel => {
-  const hasPlayableAudio = hasPlayableAudioUrl(exhibit)
+  const hasPlayableAudio = isAudioReady(exhibit)
   const audioStatus: ExplainAudioStatus = hasPlayableAudio ? 'playable' : 'unavailable'
   const location = exhibit.location
 
@@ -135,6 +154,8 @@ export const toExplainCardViewModel = (exhibit: MuseumExhibit): ExplainCardViewM
     languageLabel: languageLabelFor(exhibit.audioLanguage),
     audioStatus,
     audioStatusText: hasPlayableAudio ? '可播放' : '图文讲解',
+    playTargetType: exhibit.playTargetType,
+    playTargetId: exhibit.playTargetId,
     badges: buildBadges(exhibit),
     progress: undefined,
     poiId: location?.poiId || exhibit.poiId,
@@ -146,7 +167,7 @@ export const toExplainCardViewModel = (exhibit: MuseumExhibit): ExplainCardViewM
 export const toExplainExhibitViewModel = (exhibit: MuseumExhibit): ExplainExhibitViewModel => toExplainCardViewModel(exhibit)
 
 export const toExplainDetailPageViewModel = (exhibit: MuseumExhibit): ExplainDetailPageViewModel => {
-  const hasPlayableAudio = hasPlayableAudioUrl(exhibit)
+  const hasPlayableAudio = isAudioReady(exhibit)
   const metadataLines = [
     exhibit.size ? `展品编号：${exhibit.size}` : '',
     exhibit.year ? `年代：${exhibit.year}` : '',
@@ -163,7 +184,10 @@ export const toExplainDetailPageViewModel = (exhibit: MuseumExhibit): ExplainDet
     title: exhibit.name,
     subtitle: buildSubtitle(exhibit),
     contentType: contentTypeFor(exhibit),
-    coverImages: [exhibit.image || EXHIBIT_PLACEHOLDER_IMAGE].filter(Boolean),
+    coverImages: [
+      exhibit.image || EXHIBIT_PLACEHOLDER_IMAGE,
+      ...(exhibit.galleryUrls || [])
+    ].filter(Boolean),
     hallId: exhibit.hallId,
     hallName: exhibit.hallName,
     floorLabel: exhibit.floorLabel,
@@ -176,8 +200,14 @@ export const toExplainDetailPageViewModel = (exhibit: MuseumExhibit): ExplainDet
       language: exhibit.audioLanguage,
       unavailableReason: hasPlayableAudio
         ? undefined
-        : exhibit.audioUnavailableReason || '该展项暂无已发布音频，当前提供图文讲解。'
+        : exhibit.audioUnavailableReason || '当前语言暂无语音讲解。',
+      playTargetType: exhibit.playTargetType,
+      playTargetId: exhibit.playTargetId,
+      hasText: exhibit.audioHasText,
+      statusText: hasPlayableAudio ? '可播放' : '图文讲解'
     },
+    imageStatus: exhibit.imageStatus,
+    linkedExhibits: exhibit.linkedExhibits,
     chapters: metadataLines.length
       ? metadataLines.map((line, index) => ({
         id: `${exhibit.id}-metadata-${index}`,