chore: freeze guide and explain update

src/utils/guideTopTabs.ts

@@ -1,4 +1,5 @@
 export type GuideTopTab = 'guide' | 'explain'
+export const GUIDE_LOCATION_PREVIEW_STORAGE_KEY = 'museum-guide:last-location-preview-url'
 
 export const GUIDE_TOP_TABS: Array<{ id: GuideTopTab; label: string }> = [
   { id: 'guide', label: '导览' },
@@ -11,7 +12,29 @@ export const isGuideTopTab = (value: unknown): value is GuideTopTab => {
 
 export const guideTopTabUrl = (tab: GuideTopTab) => `/pages/index/index?tab=${tab}`
 
+export const saveLastGuideLocationPreviewUrl = (url: string) => {
+  if (typeof window === 'undefined' || !url) return
+
+  window.sessionStorage.setItem(GUIDE_LOCATION_PREVIEW_STORAGE_KEY, url)
+}
+
+export const getLastGuideLocationPreviewUrl = () => {
+  if (typeof window === 'undefined') return ''
+
+  return window.sessionStorage.getItem(GUIDE_LOCATION_PREVIEW_STORAGE_KEY) || ''
+}
+
 export const navigateToGuideTopTab = (tab: GuideTopTab) => {
+  if (tab === 'guide') {
+    const lastLocationPreviewUrl = getLastGuideLocationPreviewUrl()
+    if (lastLocationPreviewUrl) {
+      uni.reLaunch({
+        url: lastLocationPreviewUrl
+      })
+      return
+    }
+  }
+
   uni.reLaunch({
     url: guideTopTabUrl(tab)
   })