修复讲解详情返回对象列表

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

@@ -134,8 +134,11 @@ const handleExplainGuideStopClick = (stop: ExplainGuideStopCatalogItem) => {
     ? { targetType: stop.playTargetType, targetId: stop.playTargetId }
     : normalizeExplainDetailTargetFromGuideStop({ id: stop.id })
   const params = new URLSearchParams({ id: stop.id, tab: 'explain', targetType: target.targetType, targetId: target.targetId })
-  if (stop.hallId) params.set('hallId', stop.hallId)
-  if (stop.hallName) params.set('hallName', stop.hallName)
+  // 分页对象可能未回填展厅字段，详情返回必须保留当前列表的展厅上下文。
+  const hallId = stop.hallId || selectedExplainHallId.value
+  const hallName = stop.hallName || selectedExplainHallName.value
+  if (hallId) params.set('hallId', hallId)
+  if (hallName) params.set('hallName', hallName)
   if (stop.floorId) params.set('floorId', stop.floorId)
   if (stop.poiId) params.set('poiId', stop.poiId)
   uni.navigateTo({ url: `/pages/exhibit/detail?${params.toString()}` })