feat: route app_unsubscribe + fix envoi email bienvenue

UnsubscribeController :
- Route GET /unsubscribe/{email}/{token} (app_unsubscribe)
- Vérifie le token HMAC via UnsubscribeManager::isValidToken
- Si valide : désabonne l'email + page succès
- Si invalide : page erreur avec contact unsubscribe@siteconseil.fr

Templates :
- unsubscribe/success.html.twig : confirmation glassmorphism
- unsubscribe/invalid.html.twig : erreur glassmorphism

ClientsController :
- sendWelcomeEmail : suppression try/catch silencieux pour laisser
  remonter les erreurs (sinon mail jamais envoyé sans diagnostic)

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

src/Controller/Admin/ClientsController.php

@@ -156,18 +156,15 @@ class ClientsController extends AbstractController
             'token' => $user->getTempPassword(),
         ], UrlGeneratorInterface::ABSOLUTE_URL);
 
-        try {
-            $mailer->sendEmail(
-                $user->getEmail(),
-                'CRM SITECONSEIL - Bienvenue dans votre espace client',
-                $twig->render('emails/client_created.html.twig', [
-                    'firstName' => $user->getFirstName(),
-                    'email' => $user->getEmail(),
-                    'setPasswordUrl' => $setPasswordUrl,
-                ]),
-            );
-        } catch (\Throwable) {
-        }
+        $mailer->sendEmail(
+            $user->getEmail(),
+            'CRM SITECONSEIL - Bienvenue dans votre espace client',
+            $twig->render('emails/client_created.html.twig', [
+                'firstName' => $user->getFirstName(),
+                'email' => $user->getEmail(),
+                'setPasswordUrl' => $setPasswordUrl,
+            ]),
+        );
     }
 
     private function populateCustomerData(Request $request, Customer $customer): void

src/Controller/UnsubscribeController.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Controller;
+
+use App\Service\UnsubscribeManager;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+
+class UnsubscribeController extends AbstractController
+{
+    #[Route('/unsubscribe/{email}/{token}', name: 'app_unsubscribe', methods: ['GET'])]
+    public function __invoke(string $email, string $token, UnsubscribeManager $unsubscribeManager): Response
+    {
+        if (!$unsubscribeManager->isValidToken($email, $token)) {
+            return $this->render('unsubscribe/invalid.html.twig');
+        }
+
+        $unsubscribeManager->unsubscribe($email);
+
+        return $this->render('unsubscribe/success.html.twig', [
+            'email' => $email,
+        ]);
+    }
+}

templates/unsubscribe/invalid.html.twig

@@ -0,0 +1,14 @@
+{% extends 'base.html.twig' %}
+
+{% block title %}Lien invalide - CRM SITECONSEIL{% endblock %}
+
+{% block body %}
+<div class="flex items-center justify-center min-h-[calc(100vh-4rem)] px-4">
+    <div class="w-full max-w-sm glass-heavy p-8 text-center">
+        <div class="text-red-600 text-4xl mb-4">&#10007;</div>
+        <h1 class="text-lg font-bold uppercase mb-2">Lien invalide</h1>
+        <p class="text-sm text-gray-500">Ce lien de desabonnement est invalide ou a expire.</p>
+        <p class="text-xs text-gray-400 mt-4">Contactez <strong>unsubscribe@siteconseil.fr</strong> pour vous desabonner manuellement.</p>
+    </div>
+</div>
+{% endblock %}

templates/unsubscribe/success.html.twig

@@ -0,0 +1,14 @@
+{% extends 'base.html.twig' %}
+
+{% block title %}Desabonnement - CRM SITECONSEIL{% endblock %}
+
+{% block body %}
+<div class="flex items-center justify-center min-h-[calc(100vh-4rem)] px-4">
+    <div class="w-full max-w-sm glass-heavy p-8 text-center">
+        <div class="text-green-600 text-4xl mb-4">&#10003;</div>
+        <h1 class="text-lg font-bold uppercase mb-2">Desabonnement confirme</h1>
+        <p class="text-sm text-gray-500">L'adresse <strong>{{ email }}</strong> ne recevra plus d'emails commerciaux de SITECONSEIL.</p>
+        <p class="text-xs text-gray-400 mt-4">Pour vous reabonner, contactez <strong>contact@siteconseil.fr</strong>.</p>
+    </div>
+</div>
+{% endblock %}