修复导览楼层默认进入与模型复位状态

src/composables/useGuideModelState.ts

@@ -24,6 +24,14 @@ export type PoiDetailReturnContext = Readonly<{
   requestId: number
 }>
 
+export type GuideModelResetReason = 'poi-detail-close' | 'floor-reset'
+
+export type GuideModelResetRequest = Readonly<{
+  floorId: string
+  requestId: number
+  rendererReason: GuideModelResetReason
+}>
+
 type GuideModelReadyState = Readonly<{
   view: 'overview' | 'floor' | 'multi'
   floorId: string
@@ -52,6 +60,7 @@ const initialState = ref<GuideModelInitialState>(GUIDE_MODEL_INITIAL_STATE)
 const pendingModelResetAfterPoiDetail = ref<PoiDetailReturnContext | null>(null)
 const confirmedPoiDetailRequestId = ref<number | null>(null)
 const requestGeneration = ref(0)
+const pendingViewBaselineReset = ref<GuideModelResetRequest | null>(null)
 let poiDetailRequestId = 0
 
 export const useGuideModelState = () => {
@@ -107,15 +116,53 @@ export const useGuideModelState = () => {
     return requestGeneration.value
   }
 
+  const beginViewBaselineReset = ({ floorId, rendererReason }: {
+    floorId: string
+    rendererReason: GuideModelResetReason
+  }) => Object.freeze({
+    floorId,
+    rendererReason,
+    requestId: invalidatePendingRequests()
+  })
+
+  const isCurrentRequest = (requestId: number) => requestGeneration.value === requestId
+
+  // The renderer may not yet exist while the page has already received a return event.
+  // Keep exactly one latest request here so page lifecycle hooks cannot race each other.
+  const queueViewBaselineReset = (request: GuideModelResetRequest) => {
+    if (!isCurrentRequest(request.requestId)) return false
+    pendingViewBaselineReset.value = request
+    return true
+  }
+
+  const completeViewBaselineReset = (request: GuideModelResetRequest) => {
+    if (!isCurrentRequest(request.requestId)) return false
+    pendingViewBaselineReset.value = null
+    return true
+  }
+
+  const consumePendingViewBaselineReset = () => {
+    const request = pendingViewBaselineReset.value
+    if (!request || !isCurrentRequest(request.requestId)) return null
+    pendingViewBaselineReset.value = null
+    return request
+  }
+
   return {
     initialState: readonly(initialState),
     pendingModelResetAfterPoiDetail: readonly(pendingModelResetAfterPoiDetail),
     requestGeneration: readonly(requestGeneration),
+    pendingViewBaselineReset: readonly(pendingViewBaselineReset),
     initializeModel,
     beginPoiDetailReturn,
     confirmPoiDetailReturn,
     cancelPoiDetailReturn,
     consumePoiDetailReturn,
-    invalidatePendingRequests
+    invalidatePendingRequests,
+    beginViewBaselineReset,
+    isCurrentRequest,
+    queueViewBaselineReset,
+    completeViewBaselineReset,
+    consumePendingViewBaselineReset
   }
 }