Fix x-using header (#1615)

* Use `/:path*` as it includes i18n links.

See: https://nextjs.org/docs/pages/api-reference/next-config-js/headers#headers-with-i18n-support

* Use `withFaust` in app router example

* Update package-lock.json

* Add changeset

* Fix test

.changeset/slimy-plants-enjoy.md

@@ -0,0 +1,5 @@
+---
+'@faustwp/core': patch
+---
+
+Fix `x-using` header not appearing when i18n options are set in `next.config.js`

examples/next/app-router/next.config.js

@@ -1,6 +1,8 @@
+import { withFaust } from '@faustwp/core';
+
 /** @type {import('next').NextConfig} */
-export default {
+export default withFaust({
   experimental: {
     serverActions: true,
   },
-};
+});

packages/faustwp-core/src/config/withFaust.ts

@@ -72,7 +72,7 @@ export async function addHeaders(
   }
 
   headers.push({
-    source: '/(.*?)',
+    source: '/:path*',
     headers: [
       {
         key: 'x-using',

packages/faustwp-core/tests/config/withFaust.test.ts

@@ -17,7 +17,7 @@ describe('withFaust', () => {
     );
     const headers = await finalConfig.headers!();
     expect(headers).toEqual([
-      { headers: [{ key: 'x-using', value: 'faust' }], source: '/(.*?)' },
+      { headers: [{ key: 'x-using', value: 'faust' }], source: '/:path*' },
     ]);
   });
   test('it applies a default redirects config', async () => {