chore: modernize Next.js 16 config

- Convert next.config.js to next.config.ts (ESM + proper typing)
- Migrate middleware.ts to proxy.ts (deprecated in Next 16)
- Remove --turbopack flag from dev script (default in Next 16)
- Remove dead next export script (removed since Next 13)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Slashgear

next.config.js next.config.tsnext.config.js renamed to next.config.ts

@@ -1,7 +1,7 @@
-const withMDX = require('@next/mdx')();
+import type { NextConfig } from 'next';
+import withMDX from '@next/mdx';
 
-/** @type {import('next').NextConfig} */
-const nextConfig = {
+const nextConfig: NextConfig = {
   output: 'standalone',
   experimental: {
     mdxRs: true,
@@ -73,4 +73,4 @@ const nextConfig = {
   },
 };
 
-module.exports = withMDX(nextConfig);
+export default withMDX()(nextConfig);

package.json

@@ -3,10 +3,9 @@
   "version": "0.1.0",
   "private": true,
   "scripts": {
-    "dev": "next dev --turbopack",
+    "dev": "next dev",
     "build": "next build",
     "start": "next start",
-    "export": "next export",
     "lint": "oxlint",
     "fmt": "oxfmt --write .",
     "fmt:check": "oxfmt --check .",

middleware.ts proxy.tsmiddleware.ts renamed to proxy.ts

@@ -2,7 +2,7 @@ import { NextRequest, NextResponse } from 'next/server';
 
 const IS_PROD_ENV = process.env.DEPLOY_ENV === 'production' || process.env.DEPLOY_ENV === 'preview';
 
-export function middleware(request: NextRequest) {
+export function proxy(request: NextRequest) {
   const nonce = Buffer.from(crypto.randomUUID()).toString('base64');
   const cspHeader = `
     default-src 'none';