fix: 统一馆内三维模型返回初始状态

src/composables/useGuideModelState.ts

@@ -0,0 +1,85 @@
+import { readonly, ref } from 'vue'
+
+export type GuideModelInitialState = Readonly<{
+  mode: '3d'
+  indoorView: 'overview' | 'floor' | 'multi'
+  layerMode: 'single' | 'multi'
+  defaultActiveFloorId: string
+  loadedFloorId: string
+  selectedPoiId: null
+  activeFocusPoiId: null
+  targetFocusRequest: null
+  pendingTargetFocus: null
+  visiblePoiIds: null
+  temporaryFocus: false
+  poiInfoLabelVisible: false
+  routePreviewActive: false
+  navigationSimulationActive: false
+  autoFloorSwitchActive: boolean
+}>
+
+// The object is frozen so callers cannot accidentally turn a captured baseline into live state.
+export const GUIDE_MODEL_INITIAL_STATE: GuideModelInitialState = Object.freeze({
+  mode: '3d',
+  indoorView: 'overview',
+  layerMode: 'single',
+  defaultActiveFloorId: '',
+  loadedFloorId: '',
+  selectedPoiId: null,
+  activeFocusPoiId: null,
+  targetFocusRequest: null,
+  pendingTargetFocus: null,
+  visiblePoiIds: null,
+  temporaryFocus: false,
+  poiInfoLabelVisible: false,
+  routePreviewActive: false,
+  navigationSimulationActive: false,
+  autoFloorSwitchActive: true
+})
+
+const initialState = ref<GuideModelInitialState>(GUIDE_MODEL_INITIAL_STATE)
+const pendingModelResetAfterPoiDetail = ref(false)
+const requestGeneration = ref(0)
+
+export const useGuideModelState = () => {
+  const initializeModel = (floorId: string) => {
+    if (initialState.value.defaultActiveFloorId) return initialState.value
+    initialState.value = Object.freeze({
+      ...GUIDE_MODEL_INITIAL_STATE,
+      defaultActiveFloorId: floorId,
+      loadedFloorId: floorId
+    })
+    return initialState.value
+  }
+
+  const beginPoiDetailReturn = () => {
+    pendingModelResetAfterPoiDetail.value = true
+  }
+
+  const cancelPoiDetailReturn = () => {
+    pendingModelResetAfterPoiDetail.value = false
+  }
+
+  const consumePoiDetailReturn = () => {
+    if (!pendingModelResetAfterPoiDetail.value) return false
+    pendingModelResetAfterPoiDetail.value = false
+    return true
+  }
+
+  // All async focus/floor operations compare this generation before committing.
+  const invalidatePendingRequests = () => {
+    requestGeneration.value += 1
+    return requestGeneration.value
+  }
+
+  return {
+    initialState: readonly(initialState),
+    pendingModelResetAfterPoiDetail: readonly(pendingModelResetAfterPoiDetail),
+    requestGeneration: readonly(requestGeneration),
+    initializeModel,
+    beginPoiDetailReturn,
+    cancelPoiDetailReturn,
+    consumePoiDetailReturn,
+    invalidatePendingRequests
+  }
+}