.

middleware.ts

@@ -4,28 +4,26 @@ import { NextResponse, type NextRequest } from "next/server"
 import i18nConfig from "./i18nConfig"
 
 export async function middleware(request: NextRequest) {
-  const { pathname } = request.nextUrl
+  // ✅ 从 Cookie 中获取语言
+  const preferredLang = request.cookies.get("preferred-language")?.value
 
-  // ✅ 读取 cookie 中用户偏好的语言
-  const preferredLanguage = request.cookies.get('preferred-language')?.value
+  // ✅ 如果没有语言前缀，且 Cookie 中有语言偏好，则重定向一次
+  const pathname = request.nextUrl.pathname
+  const firstSegment = pathname.split("/")[1]
+  const hasLocalePrefix = i18nConfig.locales.includes(firstSegment as any)
 
-  // ✅ 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)
+  if (!hasLocalePrefix && preferredLang && i18nConfig.locales.includes(preferredLang)) {
+    const newUrl = new URL(`/${preferredLang}${pathname}`, request.url)
+    return NextResponse.redirect(newUrl)
   }
 
-  // ✅ 原始的 i18n 路由逻辑（保留）
+  // 👇 这个要留着，用于 next-i18n-router 自动 locale 路由处理
   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 === "/"
@@ -38,7 +36,9 @@ 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)
@@ -48,7 +48,9 @@ export async function middleware(request: NextRequest) {
     return response
   } catch (e) {
     return NextResponse.next({
-      request: { headers: request.headers }
+      request: {
+        headers: request.headers
+      }
     })
   }
 }