Application: refactor to return Response from processRequest() BC break (#350)

Changed Application::processRequest to return a Response object instead of sending it directly. Updated run() to call send() on the returned Response. This improves testability and separation of concerns by decoupling request processing from response sending.

Author: bckp

src/Application/Application.php

@@ -74,15 +74,17 @@ public function run(): void
 	{
 		try {
 			Arrays::invoke($this->onStartup, $this);
-			$this->processRequest($this->createInitialRequest());
+			$this->processRequest($this->createInitialRequest())
+				->send($this->httpRequest, $this->httpResponse);
 			Arrays::invoke($this->onShutdown, $this);
 
 		} catch (\Throwable $e) {
 			$this->sendHttpCode($e);
 			Arrays::invoke($this->onError, $this, $e);
 			if ($this->catchExceptions && ($req = $this->createErrorRequest($e))) {
 				try {
-					$this->processRequest($req);
+					$this->processRequest($req)
+						->send($this->httpRequest, $this->httpResponse);
 					Arrays::invoke($this->onShutdown, $this, $e);
 					return;
 
@@ -121,7 +123,7 @@ public function createInitialRequest(): Request
 	}
 
 
-	public function processRequest(Request $request): void
+	public function processRequest(Request $request): Response
 	{
 		process:
 		if (count($this->requests) > $this->maxLoop) {
@@ -156,7 +158,7 @@ public function processRequest(Request $request): void
 		}
 
 		Arrays::invoke($this->onResponse, $this, $response);
-		$response->send($this->httpRequest, $this->httpResponse);
+		return $response;
 	}