修复讲解详情返回对象列表

src/pages/exhibit/detail.vue

@@ -164,6 +164,7 @@ import {
 } from '@/utils/placeholders'
 import { isEmbeddedInWechatMiniProgram } from '@/utils/hostEnvironment'
 import { normalizeGuideAudioLanguage } from '@/data/adapters/guideStopInfoAdapter'
+import { explainGuideStopListUrl } from '@/utils/explainNavigation'
 
 const defaultDetail: ExplainDetailPageViewModel = {
   id: '',
@@ -871,23 +872,53 @@ const handleNavigate = async () => {
   })
 }
 
-const fallbackToExplainHome = () => {
+type ExplainDetailPageStackEntry = {
+  route?: string
+}
+
+const decodeRouteParam = (value: string) => {
+  let decoded = value
+  // Hash route parameters can accumulate extra encoding layers across H5 transitions.
+  for (let index = 0; index < 8; index += 1) {
+    try {
+      const next = decodeURIComponent(decoded)
+      if (next === decoded) break
+      decoded = next
+    } catch {
+      break
+    }
+  }
+
+  return decoded
+}
+
+const fallbackToExplainObjectList = () => {
+  const hallId = detailEntryRequest.value?.hallId || exhibit.value.hallId
+  const hallName = decodeRouteParam(detailEntryRequest.value?.hallName || exhibit.value.hallName || '讲解')
+  const url = hallId
+    ? explainGuideStopListUrl(hallId, hallName)
+    : '/pages/explain/list'
+
   uni.redirectTo({
-    url: '/pages/index/index?tab=explain',
+    url,
     fail: () => {
-      uni.reLaunch({
-        url: '/pages/index/index?tab=explain'
-      })
+      uni.reLaunch({ url })
     }
   })
 }
 
-const handleBack = () => {
-  uni.navigateBack({
-    delta: 1,
-    fail: fallbackToExplainHome
-  })
+const returnToExplainObjectList = () => {
+  const pages = getCurrentPages()
+  const previousPage = pages[pages.length - 2] as ExplainDetailPageStackEntry | undefined
+  if (previousPage?.route === 'pages/explain/guide-stop-list') {
+    uni.navigateBack({ delta: 1, fail: fallbackToExplainObjectList })
+    return
+  }
+
+  fallbackToExplainObjectList()
 }
+
+const handleBack = returnToExplainObjectList
 </script>
 
 <style scoped lang="scss">