展示展厅讲解对象编号

- 接入目录分页接口返回的 externalCode 字段
- 在讲解对象标题下方统一展示编号
- 保留空编号对象的原有布局并补充回归测试

Made-with: Proma

src/pages/explain/guide-stop-list.vue

@@ -43,6 +43,7 @@ let disposed = false
 const toGuideStopItems = (stops: ExplainGuideStop[]): ExplainGuideStopCatalogItem[] => stops.map((stop) => ({
   id: stop.id,
   name: stop.name,
+  externalCode: stop.externalCode,
   hallId: stop.hallId,
   hallName: stop.hallName,
   floorId: stop.floorId,