Add reviews and support tutorial management

src/middleware.ts

@@ -1,13 +1,48 @@
 import createMiddleware from 'next-intl/middleware'
+import type { NextRequest } from 'next/server'
+import { NextResponse } from 'next/server'
 import { defaultLocale, locales } from './i18n/config'
 
-export default createMiddleware({
+const intlMiddleware = createMiddleware({
   locales: [...locales],
   defaultLocale,
   localePrefix: 'always',
-  localeDetection: true,
+  localeDetection: false,
 })
 
+function shouldUseSimplifiedChinese(request: NextRequest) {
+  const acceptLanguage = request.headers.get('accept-language') || ''
+  const firstLanguage = acceptLanguage
+    .split(',')
+    .map((part) => part.trim().split(';')[0]?.toLowerCase())
+    .find(Boolean)
+
+  return Boolean(
+    firstLanguage &&
+      (firstLanguage === 'zh-cn' ||
+        firstLanguage === 'zh-hans' ||
+        firstLanguage === 'zh-sg' ||
+        firstLanguage.startsWith('zh-hans-')),
+  )
+}
+
+export default function middleware(request: NextRequest) {
+  const { pathname, search } = request.nextUrl
+  const hasLocalePrefix = locales.some(
+    (locale) => pathname === `/${locale}` || pathname.startsWith(`/${locale}/`),
+  )
+
+  if (!hasLocalePrefix) {
+    const locale = shouldUseSimplifiedChinese(request) ? 'zh' : 'en'
+    const url = request.nextUrl.clone()
+    url.pathname = `/${locale}${pathname === '/' ? '' : pathname}`
+    url.search = search
+    return NextResponse.redirect(url)
+  }
+
+  return intlMiddleware(request)
+}
+
 export const config = {
   matcher: [
     // Skip all internal paths (_next, _vercel, api, admin, payload assets, static files)