sam-api/app/Http/Middleware/CorsMiddleware.php

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;
use Symfony\Component\HttpFoundation\Response;

class CorsMiddleware
{
    public function handle(Request $request, Closure $next): Response
    {
        // OPTIONS 요청은 즉시 처리 (미들웨어 체인 진행 안 함)
        if ($request->isMethod('OPTIONS')) {
            return response()->json([], 200, [
                'Access-Control-Allow-Origin' => '*',
                'Access-Control-Allow-Methods' => 'GET, POST, PUT, DELETE, OPTIONS, PATCH',
                'Access-Control-Allow-Headers' => 'Content-Type, Authorization, X-API-KEY',
                'Access-Control-Max-Age' => '86400',
            ]);
        }

        $response = $next($request);

        $response->headers->set('Access-Control-Allow-Origin', '*');
        $response->headers->set('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS, PATCH');
        $response->headers->set('Access-Control-Allow-Headers', 'Content-Type, Authorization, X-API-KEY');

        return $response;
    }
}