新增首页前置加载页并等待模型就绪

src/components/map/ThreeMap.vue

@@ -300,6 +300,8 @@ const emit = defineEmits<{
   targetFocus: [result: TargetPoiFocusResult]
   autoSwitch: [event: { from: 'overview' | 'floor'; to: 'overview' | 'floor'; trigger: 'zoom-in' | 'zoom-out'; distance: number }]
   autoSwitchBlocked: [reason: { reason: 'loading-locked' | 'cooldown' | 'disabled' }]
+  initialModelReady: [event: { view: ViewMode; floorId?: string; elapsedMs?: number }]
+  initialModelFailed: [event: { view: ViewMode; floorId?: string; message: string; elapsedMs?: number }]
 }>()
 
 const containerRef = ref<ContainerRef>(null)
@@ -4726,6 +4728,11 @@ const init3DScene = async () => {
 
     setProgress(100, '馆内三维模型加载完成')
     isLoading.value = false
+    emit('initialModelReady', {
+      view: activeView.value,
+      floorId: currentFloor.value,
+      elapsedMs: firstModelLoadStartedAt ? Math.round(getNow() - firstModelLoadStartedAt) : undefined
+    })
     await syncRequestedIndoorView()
     queueTargetFocus(pendingTargetFocus || props.targetFocus || null)
   } catch (error) {
@@ -4734,7 +4741,14 @@ const init3DScene = async () => {
     console.error('馆内 3D 模型资源加载失败:', error)
     loadError.value = true
     isLoading.value = false
-    setProgress(0, error instanceof Error ? error.message : '请检查模型资源或网络状态后重试')
+    const message = error instanceof Error ? error.message : '请检查模型资源或网络状态后重试'
+    setProgress(0, message)
+    emit('initialModelFailed', {
+      view: activeView.value,
+      floorId: currentFloor.value,
+      message,
+      elapsedMs: firstModelLoadStartedAt ? Math.round(getNow() - firstModelLoadStartedAt) : undefined
+    })
   }
 }