fix(console): redirect /en URLs to the unprefixed English pages (#56593)

packages/console/app/src/middleware.ts

@@ -13,6 +13,18 @@ export default createMiddleware({
       url.pathname = strip(url.pathname)
       if (/^\/changelog\/?$/.test(url.pathname))
         return new Response(null, { status: 301, headers: { Location: "/changelog" } })
+      // English pages live at unprefixed URLs, so /en/... would be a duplicate of every page.
+      // /data keeps /en because it redirects unprefixed visits by cookie and Accept-Language.
+      // Collapse leading slashes so /en//example.com can't become a protocol-relative redirect.
+      if (
+        locale === "en" &&
+        (event.request.method === "GET" || event.request.method === "HEAD") &&
+        !/^\/data(\/|$)/.test(url.pathname)
+      )
+        return new Response(null, {
+          status: 301,
+          headers: { Location: `${url.pathname.replace(/^\/+/, "/")}${url.search}` },
+        })
       const request = new Request(url, event.request)
       request.headers.set(LOCALE_HEADER, locale)
       event.request = request