补齐讲解字段映射并优先展示接口展厅图

src/components/explain/ExplainHallSelect.vue

@@ -160,6 +160,9 @@ export interface ExplainGuideStopSelectItem {
   hallId?: string
   hallName?: string
   floorId?: string
+  poiId?: string
+  mapX?: number
+  mapY?: number
   coverImageUrl?: string
   description?: string
   hasAudio?: boolean
@@ -239,7 +242,7 @@ const emptyDescription = computed(() => {
 })
 
 const hallIconUrl = (hall: ExplainHallSelectItem) => {
-  return hallIconMap[hall.name.trim()] || hall.image || ''
+  return hall.image || hallIconMap[hall.name.trim()] || ''
 }
 
 const hallIconText = (name: string) => name.trim().slice(0, 1) || '讲'