fix: 统一馆内三维模型返回初始状态

src/pages/index/index.vue

@@ -325,9 +325,9 @@ import type {
   PoiSearchContext
 } from '@/domain/poiSearch'
 import {
-  toTargetFocusRequestViewModel,
   type TargetPoiFocusRequestViewModel
 } from '@/view-models/guideViewModels'
+import { useGuideModelState } from '@/composables/useGuideModelState'
 import {
   ARRIVAL_TARGETS_BY_TYPE,
   type ArrivalSearchTarget,
@@ -344,6 +344,8 @@ import type {
 type GuideIndoorView = 'overview' | 'floor' | 'multi'
 type LayerDisplayMode = 'single' | 'multi'
 
+const guideModelState = useGuideModelState()
+
 const isIndexHashRoute = () => {
   if (typeof window === 'undefined') return false
 
@@ -416,6 +418,7 @@ const returningToOverview = ref(false)
 const guideMapShellRef = ref<{
   clearRoute?: () => void
   showOverview?: () => Promise<void> | void
+  resetToInitialState?: () => Promise<boolean> | boolean
 } | null>(null)
 const homeSearchPanelRef = ref<{
   collapseHomePanel?: () => void
@@ -427,9 +430,7 @@ const homeSearchExpanded = ref(false)
 const homeCategoryModeActive = ref(false)
 const searchVisiblePoiIds = ref<string[] | null>(null)
 const searchTargetFocusRequest = ref<TargetPoiFocusRequestViewModel | null>(null)
-let searchTargetFocusRequestId = 0
-let pendingCollapseSearchAfterDetail = false
-let pendingSearchDetailFocusRequest: TargetPoiFocusRequestViewModel | null = null
+let pendingGuideModelResetUntilReady = false
 
 type PoiSearchOverlayHistoryState = {
   museumGuideOverlay?: 'poi-search'
@@ -916,6 +917,7 @@ const loadGuideFloors = async () => {
       || floors[0]?.id
       || activeGuideFloor.value
     renderedFloorId.value = activeGuideFloor.value
+    guideModelState.initializeModel(activeGuideFloor.value)
   } catch (error) {
     console.error('加载导览楼层失败:', error)
     guideFloors.value = []
@@ -1031,7 +1033,12 @@ const handleAutoSwitch = (event: { from: 'overview' | 'floor'; to: 'overview' |
 }
 
 const handleInitialModelReady = (event: { view: GuideIndoorView; floorId?: string; elapsedMs?: number }) => {
+  guideModelState.initializeModel(event.floorId || activeGuideFloor.value)
   settleLaunchOverlayByModel('ready', event)
+  if (pendingGuideModelResetUntilReady) {
+    pendingGuideModelResetUntilReady = false
+    void resetGuideModelToInitial({ reason: 'queued-poi-detail-close' })
+  }
 }
 
 const handleInitialModelFailed = (event: { view: GuideIndoorView; floorId?: string; message: string; elapsedMs?: number }) => {
@@ -1449,27 +1456,45 @@ const closeHomeSearchDock = () => {
   homeSearchExpanded.value = false
 }
 
+const resetGuideModelToInitial = async ({ reason }: { reason: 'poi-detail-close' | 'queued-poi-detail-close' }) => {
+  const initial = guideModelState.initialState.value
+  guideModelState.invalidatePendingRequests()
+  searchTargetFocusRequest.value = null
+  searchVisiblePoiIds.value = null
+  homeCategoryModeActive.value = false
+  selectedGuidePoi.value = null
+  isPoiCardCollapsed.value = false
+  showRoutePlanner.value = false
+  activeRoutePreview.value = null
+  routeStartPoint.value = null
+  routeEndPoint.value = null
+  routePlanError.value = ''
+  isSimulatingRoute.value = false
+  requestedFloorId.value = ''
+  requestedFloorLabel.value = ''
+  loadingFloorId.value = ''
+  failedFloorId.value = ''
+  is3DMode.value = true
+  guideOutdoorState.value = 'home'
+  indoorView.value = initial.indoorView
+  activeGuideFloor.value = initial.defaultActiveFloorId || activeGuideFloor.value
+  renderedFloorId.value = initial.loadedFloorId || activeGuideFloor.value
+  closeArrivalPanel()
+  await homeSearchPanelRef.value?.resetSearchState?.()
+  closeHomeSearchDock()
+
+  const resetApplied = await guideMapShellRef.value?.resetToInitialState?.()
+  if (!resetApplied) {
+    // The renderer is still becoming ready; retain only the latest requested reset.
+    pendingGuideModelResetUntilReady = true
+  }
+  console.info('馆内三维模型已恢复统一初始状态:', { reason })
+}
+
 onShow(async () => {
   await nextTick()
-  if (pendingCollapseSearchAfterDetail) {
-    pendingCollapseSearchAfterDetail = false
-    const pendingFocusRequest = pendingSearchDetailFocusRequest
-    pendingSearchDetailFocusRequest = null
-    await homeSearchPanelRef.value?.returnToCollapsedAfterDetail?.()
-    homeSearchExpanded.value = false
-    homeCategoryModeActive.value = false
-    searchVisiblePoiIds.value = null
-    if (pendingFocusRequest) {
-      closeArrivalPanel()
-      showRoutePlanner.value = false
-      isSimulatingRoute.value = false
-      selectedGuidePoi.value = null
-      isPoiCardCollapsed.value = false
-      is3DMode.value = true
-      indoorView.value = 'floor'
-      activeGuideFloor.value = pendingFocusRequest.floorId
-      searchTargetFocusRequest.value = pendingFocusRequest
-    }
+  if (guideModelState.consumePoiDetailReturn()) {
+    await resetGuideModelToInitial({ reason: 'poi-detail-close' })
     return
   }
 
@@ -1569,29 +1594,13 @@ const createSearchDetailUrl = (poi: MuseumPoi, context: PoiSearchContext) => {
 }
 
 const handleHomeSearchResultTap = async (poi: MuseumPoi, context: PoiSearchContext) => {
-  searchTargetFocusRequestId += 1
-  pendingSearchDetailFocusRequest = toTargetFocusRequestViewModel({
-    poiId: poi.id,
-    name: poi.name,
-    floorId: poi.floorId,
-    floorLabel: poi.floorLabel,
-    primaryCategoryZh: poi.primaryCategory.label,
-    positionGltf: poi.positionGltf,
-    sourceObjectName: poi.sourceObjectName,
-    kind: poi.kind,
-    hallId: poi.hallId,
-    hallName: poi.hallName,
-    entrances: poi.entrances
-  }, searchTargetFocusRequestId)
-
-  // 详情页会一次性挂载目标楼层；首页不再先启动并销毁 ThreeMap。
+  // The homepage keeps its renderer mounted; detail close is consumed by onShow once.
   searchTargetFocusRequest.value = null
-  pendingCollapseSearchAfterDetail = true
+  guideModelState.beginPoiDetailReturn()
   uni.navigateTo({
     url: createSearchDetailUrl(poi, context),
     fail: () => {
-      pendingCollapseSearchAfterDetail = false
-      pendingSearchDetailFocusRequest = null
+      guideModelState.cancelPoiDetailReturn()
       uni.showToast({
         title: '点位详情打开失败，请重试',
         icon: 'none'