fix(docs): use window.location.replace for reliable language redirect

Replace router.go() with window.location.replace() for browser language
auto-detection redirect. This ensures more reliable redirection without
relying on VitePress client-side routing, and prevents the language
selection page from briefly flashing before redirect.

Author: LessUp

docs/index.md

@@ -15,25 +15,23 @@ hero:
 
 <script setup>
 import { onBeforeMount } from 'vue'
-import { useRouter } from 'vitepress'
 
 // Client-only execution for SSR compatibility
 onBeforeMount(() => {
   if (typeof window === 'undefined') return
-  
-  const router = useRouter()
+
   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 currentPath = window.location.pathname
-  
+
   // Only redirect if not already on correct language path
   if (targetLang === '/zh/' && !currentPath.startsWith('/zh')) {
-    router.go('/zh/')
+    window.location.replace('/zh/')
   } else if (targetLang === '/en/' && !currentPath.startsWith('/en')) {
-    router.go('/en/')
+    window.location.replace('/en/')
   }
 })
 </script>