fix: fix version switch again

Author: MC-XiaoHei

docs/.vitepress/theme/prefer/prefer.ts

@@ -1,6 +1,5 @@
 import {ref} from 'vue'
-
-export const inBrowser = typeof window !== 'undefined'
+import {inBrowser} from "vitepress";
 
 function getBoolean(key: string, defaultValue: boolean) {
     if (inBrowser) {

docs/.vitepress/theme/versioning/VersionSwitcher.vue

@@ -69,12 +69,12 @@ watch(
         <div class="items">
             <VPMenuLink v-if="!isLatest" :item="{
         text: latestVersion,
-        link: `/../index`,
+        link: `/../`,
       }"/>
             <template v-for="version in versions" :key="version">
                 <VPMenuLink v-if="currentVersion != version" :item="{
           text: version,
-          link: `${isLatest? '' : '/..'}/${version}/index`,
+          link: `${isLatest? '' : '/..'}/${version}/`,
         }"/>
             </template>
         </div>
@@ -88,12 +88,12 @@ watch(
         <div id="navbar-group-version" class="items">
             <VPMenuLink :item="{
         text: latestVersion,
-        link: `${isLatest? '' : '/..'}/index`,
+        link: `${isLatest? '' : '/..'}/`,
       }"/>
             <template v-for="version in versions" :key="version">
                 <VPMenuLink :item="{
           text: version,
-          link: `${isLatest? '' : '/..'}/${version}/index`,
+          link: `${isLatest? '' : '/..'}/${version}/`,
         }"/>
             </template>
         </div>

docs/.vitepress/theme/versioning/version.ts

@@ -1,4 +1,19 @@
-import {ref} from "vue";
+import {ref, watch} from "vue";
+import {inBrowser} from "vitepress";
 
-export const currentVersion = ref('');
-export const latestVersion = ref('');
+function getString(key: string, defaultValue: string) {
+    if (inBrowser) {
+        return localStorage.getItem(key) || defaultValue;
+    } else {
+        return defaultValue;
+    }
+}
+
+export const currentVersion = ref(getString('current-version', ''));
+export const latestVersion = ref('');
+
+watch(currentVersion, (value) => {
+    if (inBrowser) {
+        localStorage.setItem('current-version', value);
+    }
+});