Refactor Application to return Response from processRequest

[bckp]

• bug fix / new feature?
  refactor
• BC break?
  yes
• doc PR: nette/docs
  not yet, i will add it when i know this PR can be merged

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.

This is code regarding my issue #348, this would really help us create long-running application, as with simple change we can run processRequest and get response for PSR response, all other stuff can be done, but without this, we are forced to do ob_cache and it is not nice solution :)

[Copilot]

Pull Request Overview

This PR refactors the Application class to decouple request processing from response sending by having processRequest return a Response object rather than sending it directly. Key changes include updating the run() method to call send() on the Response, modifying processRequest’s return type, and adjusting error handling accordingly.

Comments suppressed due to low confidence (1)

src/Application/Application.php:124

• Update the PHPDoc block for processRequest to reflect that it now returns a Response object instead of void. This improves clarity and API documentation.

	public function processRequest(Request $request): Response

[Copilot]

[nitpick] For enhanced readability and debugging, consider storing the returned Response in a temporary variable before calling send().

Suggested change

	$this->processRequest($this->createInitialRequest())->send($this->httpRequest, $this->httpResponse);
	$response = $this->processRequest($this->createInitialRequest());
	$response->send($this->httpRequest, $this->httpResponse);

[Copilot]

[nitpick] For consistency with the run() method, consider assigning the returned Response to a variable before invoking send(), which can help with error handling and debugging.

Suggested change

	$this->processRequest($req)->send($this->httpRequest, $this->httpResponse);
	$response = $this->processRequest($req);
	$response->send($this->httpRequest, $this->httpResponse);