feat: 临时改造讲解页方案 B 链路

接入展厅列表、展厅讲解点分组生成临时业务单元，并迁移讲解详情播放正文到新接口链路。

src/repositories/ExplainRepository.ts

@@ -1,4 +1,6 @@
 import type {
+  ExplainBusinessUnit,
+  ExplainGuideStop,
   ExplainTrack,
   MuseumExhibit,
   MuseumHall,
@@ -23,6 +25,8 @@ export interface ExplainRepository {
   getExhibitById(id: string): Promise<MuseumExhibit | null>
   listHalls(): Promise<MuseumHall[]>
   getHallById(id: string): Promise<MuseumHall | null>
+  listGuideStopsByHall(hallId: string): Promise<ExplainGuideStop[]>
+  listTemporaryBusinessUnitsByHall(hallId: string): Promise<ExplainBusinessUnit[]>
   listTracks(): Promise<ExplainTrack[]>
   getTrackByExhibitId(exhibitId: string): Promise<ExplainTrack | null>
   searchExplain(keyword?: string): Promise<SearchIndexItem[]>
@@ -57,6 +61,18 @@ export class DefaultExplainRepository implements ExplainRepository {
     return this.content.getHallById(id)
   }
 
+  async listGuideStopsByHall(hallId: string) {
+    return this.explainContent.listGuideStopsByHall?.(hallId) || []
+  }
+
+  async listTemporaryBusinessUnitsByHall(hallId: string) {
+    if (this.explainContent.listTemporaryBusinessUnitsByHall) {
+      return this.explainContent.listTemporaryBusinessUnitsByHall(hallId)
+    }
+
+    return []
+  }
+
   async listTracks() {
     const tracks = await this.explainContent.listTracks()
     if (tracks.length) return tracks