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/pages/index/index.vue

@@ -204,9 +204,16 @@
     <view v-else-if="currentTab === 'explain'" class="explain-page">
       <ExplainHallSelect
         :halls="explainHallItems"
+        :business-units="explainBusinessUnitItems"
+        :guide-stops="explainGuideStopItems"
+        :stage="explainStage"
+        :selected-hall-name="selectedExplainHallName"
+        :selected-business-unit-name="selectedExplainBusinessUnitName"
         :loading="explainLoading"
         :error="explainError"
         @hall-click="handleExplainHallClick"
+        @business-unit-click="handleExplainBusinessUnitClick"
+        @guide-stop-click="handleExplainGuideStopClick"
         @back="handleExplainBack"
       />
     </view>
@@ -224,6 +231,9 @@ import type {
   RoutePointOption
 } from '@/components/navigation/RoutePointPicker.vue'
 import ExplainHallSelect, {
+  type ExplainBusinessUnitSelectItem,
+  type ExplainGuideStopSelectItem,
+  type ExplainSelectStage,
   type ExplainHallSelectItem
 } from '@/components/explain/ExplainHallSelect.vue'
 import {
@@ -246,7 +256,7 @@ import type {
 import type {
   GuideRouteResult,
   GuideRouteTarget,
-  MuseumExhibit,
+  ExplainBusinessUnit,
   MuseumFloor,
   MuseumHall
 } from '@/domain/museum'
@@ -435,10 +445,40 @@ const routeSimulationStepText = computed(() => {
 })
 
 const explainHallItems = ref<ExplainHallSelectItem[]>([])
+const explainBusinessUnits = ref<ExplainBusinessUnit[]>([])
+const explainStage = ref<ExplainSelectStage>('hall')
+const selectedExplainHallId = ref('')
+const selectedExplainHallName = ref('')
+const selectedExplainBusinessUnitId = ref('')
+const selectedExplainBusinessUnitName = ref('')
 const explainLoading = ref(false)
 const explainError = ref('')
 let explainLoadPromise: Promise<void> | null = null
 
+const selectedExplainBusinessUnit = computed(() => (
+  explainBusinessUnits.value.find((unit) => unit.id === selectedExplainBusinessUnitId.value) || null
+))
+const explainBusinessUnitItems = computed<ExplainBusinessUnitSelectItem[]>(() => (
+  explainBusinessUnits.value.map((unit) => ({
+    id: unit.id,
+    name: unit.name,
+    hallId: unit.hallId,
+    guideStopCount: unit.guideStopCount
+  }))
+))
+const explainGuideStopItems = computed<ExplainGuideStopSelectItem[]>(() => (
+  selectedExplainBusinessUnit.value?.stops.map((stop) => ({
+    id: stop.id,
+    name: stop.name,
+    hallId: stop.hallId,
+    hallName: stop.hallName,
+    floorId: stop.floorId,
+    coverImageUrl: stop.coverImageUrl,
+    description: stop.description,
+    hasAudio: stop.hasAudio
+  })) || []
+))
+
 // Tab 切换处理
 const syncTopTabToUrl = (tabId: GuideTopTab) => {
   if (typeof window === 'undefined') return
@@ -452,7 +492,7 @@ const syncTopTabToUrl = (tabId: GuideTopTab) => {
 
 const loadTopTabData = (tabId: GuideTopTab) => {
   if (tabId === 'explain') {
-    void loadExplainExhibits()
+    void loadExplainHalls()
   } else {
     void loadGuideFloors()
   }
@@ -554,7 +594,7 @@ const loadGuideFloors = async () => {
   }
 }
 
-const loadExplainExhibits = async () => {
+const loadExplainHalls = async () => {
   if (explainHallItems.value.length) return
   if (explainLoadPromise) return explainLoadPromise
 
@@ -563,11 +603,8 @@ const loadExplainExhibits = async () => {
 
   explainLoadPromise = (async () => {
     try {
-      const [halls, exhibits] = await Promise.all([
-        explainUseCase.listHalls(),
-        explainUseCase.listExplainExhibits()
-      ])
-      explainHallItems.value = buildExplainHallItems(halls, exhibits)
+      const halls = await explainUseCase.loadExplainHalls()
+      explainHallItems.value = buildExplainHallItems(halls)
     } catch (error) {
       console.error('加载讲解内容失败:', error)
       explainError.value = '讲解内容加载失败，请稍后重试'
@@ -584,52 +621,14 @@ const loadExplainExhibits = async () => {
 const normalizeExplainKeyword = (value?: string) => (value || '').trim().toLowerCase()
 
 const buildExplainHallItems = (
-  halls: Awaited<ReturnType<typeof explainUseCase.listHalls>>,
-  exhibits: MuseumExhibit[]
+  halls: Awaited<ReturnType<typeof explainUseCase.loadExplainHalls>>
 ): ExplainHallSelectItem[] => {
-  const countsByHallId = new Map<string, number>()
-  const countsByHallName = new Map<string, number>()
-  const keywordsByHallId = new Map<string, Set<string>>()
-  const keywordsByHallName = new Map<string, Set<string>>()
-
-  exhibits.forEach((exhibit) => {
-    const keywordParts = [
-      exhibit.name,
-      exhibit.hallName,
-      exhibit.floorLabel,
-      exhibit.description,
-      exhibit.guideTitle,
-      exhibit.guideText,
-      ...(exhibit.tags || [])
-    ].filter(Boolean) as string[]
-
-    if (exhibit.hallId) {
-      countsByHallId.set(exhibit.hallId, (countsByHallId.get(exhibit.hallId) || 0) + 1)
-      const keywords = keywordsByHallId.get(exhibit.hallId) || new Set<string>()
-      keywordParts.forEach((part) => keywords.add(part))
-      keywordsByHallId.set(exhibit.hallId, keywords)
-    }
-
-    if (exhibit.hallName) {
-      countsByHallName.set(exhibit.hallName, (countsByHallName.get(exhibit.hallName) || 0) + 1)
-      const keywords = keywordsByHallName.get(exhibit.hallName) || new Set<string>()
-      keywordParts.forEach((part) => keywords.add(part))
-      keywordsByHallName.set(exhibit.hallName, keywords)
-    }
-  })
-
   return halls.map((hall) => {
-    const explainCount = countsByHallId.get(hall.id)
-      || countsByHallName.get(hall.name)
-      || hall.exhibitCount
-      || 0
     const keywordParts = [
       hall.name,
       hall.floorLabel,
       hall.description,
-      hall.area,
-      ...Array.from(keywordsByHallId.get(hall.id) || []),
-      ...Array.from(keywordsByHallName.get(hall.name) || [])
+      hall.area
     ].filter(Boolean) as string[]
 
     return {
@@ -637,7 +636,7 @@ const buildExplainHallItems = (
       name: hall.name,
       floorLabel: hall.floorLabel,
       image: hall.image,
-      explainCount,
+      explainCount: hall.exhibitCount || 0,
       searchText: normalizeExplainKeyword(keywordParts.join(' '))
     }
   })
@@ -1222,13 +1221,67 @@ const guideSearchText = computed(() => {
 })
 
 // 讲解页面处理
-const handleExplainHallClick = (hallId: string) => {
+const handleExplainHallClick = async (hallId: string) => {
+  const hall = explainHallItems.value.find((item) => item.id === hallId)
+  selectedExplainHallId.value = hallId
+  selectedExplainHallName.value = hall?.name || '业务单元'
+  selectedExplainBusinessUnitId.value = ''
+  selectedExplainBusinessUnitName.value = ''
+  explainBusinessUnits.value = []
+  explainError.value = ''
+  explainLoading.value = true
+
+  try {
+    explainBusinessUnits.value = await explainUseCase.loadTemporaryBusinessUnitsByHall(hallId)
+    explainStage.value = 'unit'
+  } catch (error) {
+    console.error('加载展厅讲解点失败:', error)
+    explainError.value = '展厅讲解点加载失败，请稍后重试'
+    explainStage.value = 'unit'
+  } finally {
+    explainLoading.value = false
+  }
+}
+
+const handleExplainBusinessUnitClick = (unitId: string) => {
+  const unit = explainBusinessUnits.value.find((item) => item.id === unitId)
+  selectedExplainBusinessUnitId.value = unitId
+  selectedExplainBusinessUnitName.value = unit?.name || '讲解点'
+  explainStage.value = 'stop'
+}
+
+const handleExplainGuideStopClick = (stopId: string) => {
+  const params = new URLSearchParams({
+    id: stopId,
+    tab: 'explain',
+    targetType: 'STOP',
+    targetId: stopId
+  })
   uni.navigateTo({
-    url: `/pages/hall/detail?id=${encodeURIComponent(hallId)}&tab=explain`
+    url: `/pages/exhibit/detail?${params.toString()}`
   })
 }
 
 const handleExplainBack = () => {
+  if (explainStage.value === 'stop') {
+    explainStage.value = 'unit'
+    selectedExplainBusinessUnitId.value = ''
+    selectedExplainBusinessUnitName.value = ''
+    explainError.value = ''
+    return
+  }
+
+  if (explainStage.value === 'unit') {
+    explainStage.value = 'hall'
+    selectedExplainHallId.value = ''
+    selectedExplainHallName.value = ''
+    selectedExplainBusinessUnitId.value = ''
+    selectedExplainBusinessUnitName.value = ''
+    explainBusinessUnits.value = []
+    explainError.value = ''
+    return
+  }
+
   currentTab.value = 'guide'
   syncTopTabToUrl('guide')
   loadTopTabData('guide')