feat: listener redirection par sous-domaine (webmail/status)

SubdomainRedirectListener (priority 256, KernelEvents::REQUEST) :
- webmail.siteconseil.fr → /webmail (app_webmail_login)
- status.siteconseil.fr → /status (app_status)
- Ignore les sub-requests, ne redirige pas si déjà sur la bonne route
- Mapping dans constante SUBDOMAIN_ROUTES (extensible)

Tests (6 tests) :
- testWebmailRedirect : host webmail → redirect /webmail
- testStatusRedirect : host status → redirect /status
- testNoRedirectOnCrmHost : host crm → pas de redirect
- testNoRedirectWhenAlreadyOnTarget : déjà sur /webmail → pas de redirect
- testNoRedirectOnSubPath : /status/api → pas de redirect
- testSubRequestIgnored : sub-request ignorée

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/EventListener/SubdomainRedirectListenerTest.php

@@ -0,0 +1,86 @@
+<?php
+
+namespace App\Tests\EventListener;
+
+use App\EventListener\SubdomainRedirectListener;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\HttpFoundation\RedirectResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\Event\RequestEvent;
+use Symfony\Component\HttpKernel\HttpKernelInterface;
+use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
+
+class SubdomainRedirectListenerTest extends TestCase
+{
+    private function createListener(): SubdomainRedirectListener
+    {
+        $urlGenerator = $this->createStub(UrlGeneratorInterface::class);
+        $urlGenerator->method('generate')->willReturnMap([
+            ['app_webmail_login', [], 1, '/webmail'],
+            ['app_status', [], 1, '/status'],
+        ]);
+
+        return new SubdomainRedirectListener($urlGenerator);
+    }
+
+    private function createEvent(string $host, string $path = '/'): RequestEvent
+    {
+        $request = Request::create('https://'.$host.$path);
+        $kernel = $this->createStub(HttpKernelInterface::class);
+
+        return new RequestEvent($kernel, $request, HttpKernelInterface::MAIN_REQUEST);
+    }
+
+    public function testWebmailRedirect(): void
+    {
+        $event = $this->createEvent('webmail.siteconseil.fr');
+        ($this->createListener())($event);
+
+        $this->assertInstanceOf(RedirectResponse::class, $event->getResponse());
+        $this->assertSame('/webmail', $event->getResponse()->getTargetUrl());
+    }
+
+    public function testStatusRedirect(): void
+    {
+        $event = $this->createEvent('status.siteconseil.fr');
+        ($this->createListener())($event);
+
+        $this->assertInstanceOf(RedirectResponse::class, $event->getResponse());
+        $this->assertSame('/status', $event->getResponse()->getTargetUrl());
+    }
+
+    public function testNoRedirectOnCrmHost(): void
+    {
+        $event = $this->createEvent('crm.siteconseil.fr');
+        ($this->createListener())($event);
+
+        $this->assertNull($event->getResponse());
+    }
+
+    public function testNoRedirectWhenAlreadyOnTarget(): void
+    {
+        $event = $this->createEvent('webmail.siteconseil.fr', '/webmail');
+        ($this->createListener())($event);
+
+        $this->assertNull($event->getResponse());
+    }
+
+    public function testNoRedirectOnSubPath(): void
+    {
+        $event = $this->createEvent('status.siteconseil.fr', '/status/api');
+        ($this->createListener())($event);
+
+        $this->assertNull($event->getResponse());
+    }
+
+    public function testSubRequestIgnored(): void
+    {
+        $request = Request::create('https://webmail.siteconseil.fr/');
+        $kernel = $this->createStub(HttpKernelInterface::class);
+        $event = new RequestEvent($kernel, $request, HttpKernelInterface::SUB_REQUEST);
+
+        ($this->createListener())($event);
+
+        $this->assertNull($event->getResponse());
+    }
+}