.

middleware.ts

@@ -4,12 +4,28 @@ import { NextResponse, type NextRequest } from "next/server"
 import i18nConfig from "./i18nConfig"
 
 export async function middleware(request: NextRequest) {
+  const { pathname } = request.nextUrl
+
+  // ✅ 读取 cookie 中用户偏好的语言
+  const preferredLanguage = request.cookies.get('preferred-language')?.value
+
+  // ✅ 判断是否需要重定向到带有语言前缀的 URL
+  const isMissingLocalePrefix = !i18nConfig.locales.some(locale =>
+    pathname.startsWith(`/${locale}/`) || pathname === `/${locale}`
+  )
+
+  if (preferredLanguage && isMissingLocalePrefix) {
+    const url = request.nextUrl.clone()
+    url.pathname = `/${preferredLanguage}${pathname}`
+    return NextResponse.redirect(url)
+  }
+
+  // ✅ 原始的 i18n 路由逻辑（保留）
   const i18nResult = i18nRouter(request, i18nConfig)
   if (i18nResult) return i18nResult
 
   try {
     const { supabase, response } = createClient(request)
-
     const session = await supabase.auth.getSession()
 
     const redirectToChat = session && request.nextUrl.pathname === "/"
@@ -22,9 +38,7 @@ export async function middleware(request: NextRequest) {
         .eq("is_home", true)
         .single()
 
-      if (!homeWorkspace) {
-        throw new Error(error?.message)
-      }
+      if (!homeWorkspace) throw new Error(error?.message)
 
       return NextResponse.redirect(
         new URL(`/${homeWorkspace.id}/chat`, request.url)
@@ -34,9 +48,7 @@ export async function middleware(request: NextRequest) {
     return response
   } catch (e) {
     return NextResponse.next({
-      request: {
-        headers: request.headers
-      }
+      request: { headers: request.headers }
     })
   }
 }