完善建筑外观切换与宿主页面适配

src/pages/index/index.vue

@@ -135,7 +135,7 @@
             <view class="guide-quick-icon-floor top"></view>
             <view class="guide-quick-icon-floor bottom"></view>
           </view>
-          <text class="guide-quick-action-text">馆内</text>
+          <text class="guide-quick-action-text">{{ indoorQuickActionLabel }}</text>
         </view>
         <view
           class="guide-quick-action"
@@ -416,10 +416,12 @@ const routeReady = ref(false)
 const activeRoutePreview = ref<GuideRouteResult | null>(null)
 const isSimulatingRoute = ref(false)
 const isPoiCardCollapsed = ref(false)
+const returningToOverview = ref(false)
 
 // GuideMapShell 组件引用，用于显式调用路线清除方法
 const guideMapShellRef = ref<{
   clearRoute?: () => void
+  showOverview?: () => Promise<void> | void
 } | null>(null)
 const homeSearchPanelRef = ref<{
   expandHomePanel?: () => void
@@ -696,6 +698,9 @@ const guideQuickActiveAction = computed<'indoor' | 'arrival' | 'explain'>(() =>
   if (showArrivalPanel.value) return 'arrival'
   return is3DMode.value ? 'indoor' : 'arrival'
 })
+const indoorQuickActionLabel = computed(() => (
+  is3DMode.value && indoorView.value !== 'overview' ? '外观' : '馆内'
+))
 
 const toRoutePointOption = (target: GuideRouteTarget): RoutePointOption => ({
   poiId: target.poiId,
@@ -1299,7 +1304,36 @@ const handleSwitchEntrance = () => {
   guideOutdoorState.value = 'home'
 }
 
-const handleMoreRouteGuide = () => {
+const handleMoreRouteGuide = async () => {
+  if (returningToOverview.value) return
+
+  if (is3DMode.value && indoorView.value !== 'overview') {
+    returningToOverview.value = true
+    showRoutePlanner.value = false
+    selectedGuidePoi.value = null
+    isPoiCardCollapsed.value = false
+    isSimulatingRoute.value = false
+    requestedFloorId.value = ''
+    requestedFloorLabel.value = ''
+    loadingFloorId.value = ''
+    failedFloorId.value = ''
+    clearRoutePreviewState()
+
+    try {
+      await guideMapShellRef.value?.showOverview?.()
+      indoorView.value = 'overview'
+      guideOutdoorState.value = 'home'
+      closeHomeSearchDock()
+      showIndoorHint('已返回建筑外观，可放大再次进入馆内', 3200)
+    } catch (error) {
+      console.error('返回建筑外观失败:', error)
+      showIndoorHint('建筑外观加载失败，请稍后重试', 3200)
+    } finally {
+      returningToOverview.value = false
+    }
+    return
+  }
+
   closeArrivalPanel()
   showRoutePlanner.value = false
   is3DMode.value = true