fix(docs): prepend base path to language redirect URLs

Use import.meta.env.BASE_URL to construct correct redirect paths.
Previously hardcoded /zh/ and /en/ caused 404 on GitHub Pages where
the site is served under /compress-kit/.

Author: LessUp

docs/en/index.md

@@ -19,7 +19,7 @@ import { onBeforeMount } from 'vue'
 
 onBeforeMount(() => {
   if (typeof window !== 'undefined') {
-    localStorage.setItem('docs-lang-preference', '/en/')
+    localStorage.setItem('docs-lang-preference', `${import.meta.env.BASE_URL}en/`)
   }
 })
 </script>

docs/index.md

@@ -20,18 +20,19 @@ import { onBeforeMount } from 'vue'
 onBeforeMount(() => {
   if (typeof window === 'undefined') return
 
+  const base = import.meta.env.BASE_URL
   const userLang = navigator.language || navigator.userLanguage || ''
   const savedLang = localStorage.getItem('docs-lang-preference')
 
   // Use saved preference if exists, otherwise use browser language
-  const targetLang = savedLang || (userLang.startsWith('zh') ? '/zh/' : '/en/')
+  const targetLang = savedLang || (userLang.startsWith('zh') ? `${base}zh/` : `${base}en/`)
   const currentPath = window.location.pathname
 
   // Only redirect if not already on correct language path
-  if (targetLang === '/zh/' && !currentPath.startsWith('/zh')) {
-    window.location.replace('/zh/')
-  } else if (targetLang === '/en/' && !currentPath.startsWith('/en')) {
-    window.location.replace('/en/')
+  if (targetLang.endsWith('/zh/') && !currentPath.includes('/zh/')) {
+    window.location.replace(`${base}zh/`)
+  } else if (targetLang.endsWith('/en/') && !currentPath.includes('/en/')) {
+    window.location.replace(`${base}en/`)
   }
 })
 </script>

docs/zh/index.md

@@ -19,7 +19,7 @@ import { onBeforeMount } from 'vue'
 
 onBeforeMount(() => {
   if (typeof window !== 'undefined') {
-    localStorage.setItem('docs-lang-preference', '/zh/')
+    localStorage.setItem('docs-lang-preference', `${import.meta.env.BASE_URL}zh/`)
   }
 })
 </script>