initialization

src/Middleware/JsonResponseMiddleware.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Middleware;
+
+use Psr\Http\Message\ResponseInterface as Response;
+use Psr\Http\Message\ServerRequestInterface as Request;
+use Psr\Http\Server\MiddlewareInterface as Middleware;
+use Psr\Http\Server\RequestHandlerInterface as RequestHandler;
+
+class JsonResponseMiddleware implements Middleware
+{
+    public function process(Request $request, RequestHandler $handler): Response
+    {
+        $response = $handler->handle($request);
+        
+        // Add JSON content type for API routes
+        if (strpos($request->getUri()->getPath(), '/api/') === 0) {
+            if (!$response->hasHeader('Content-Type')) {
+                $response = $response->withHeader('Content-Type', 'application/json');
+            }
+        }
+        
+        return $response;
+    }
+}