fix: rename middleware.ts to proxy.ts (Next.js 16.2.7 deprecation)

proxy.ts

@@ -0,0 +1,64 @@
+import { NextResponse } from 'next/server';
+import type { NextRequest } from 'next/server';
+import { rateLimit } from './lib/rate-limit';
+
+/**
+ * Middleware to enforce rate limiting on specific API routes.
+ *
+ * Protected Routes:
+ * - /api/streak
+ * - /api/github
+ * - /api/track-user
+ * - /api/stats
+ * - /api/og
+ *
+ * Limit: 60 requests per minute per IP.
+ */
+export async function middleware(request: NextRequest) {
+  // Use Vercel's ip property if available, fallback to headers, then localhost
+  const ip =
+    request.headers.get('x-forwarded-for')?.split(',')[0] ??
+    request.headers.get('x-real-ip') ??
+    '127.0.0.1';
+
+  // Apply rate limiting
+  // 60 requests per 60,000ms (1 minute)
+  const result = await rateLimit(ip, 60, 60000);
+
+  if (!result.success) {
+    return NextResponse.json(
+      { error: 'Too many requests' },
+      {
+        status: 429,
+        headers: {
+          'Content-Type': 'application/json',
+          'X-RateLimit-Limit': result.limit.toString(),
+          'X-RateLimit-Remaining': result.remaining.toString(),
+          'X-RateLimit-Reset': result.reset.toString(),
+        },
+      }
+    );
+  }
+
+  // Add rate limit headers to the response for successful requests
+  const response = NextResponse.next();
+  response.headers.set('X-RateLimit-Limit', result.limit.toString());
+  response.headers.set('X-RateLimit-Remaining', result.remaining.toString());
+  response.headers.set('X-RateLimit-Reset', result.reset.toString());
+
+  return response;
+}
+
+/**
+ * Configure which routes should trigger this middleware.
+ * Using a matcher is more efficient than checking pathnames inside the middleware.
+ */
+export const config = {
+  matcher: [
+    '/api/streak/:path*',
+    '/api/github/:path*',
+    '/api/track-user/:path*',
+    '/api/stats/:path*',
+    '/api/og/:path*',
+  ],
+};