feat: ajout WebmailController avec page login Esy-Mail

Interface uniquement (pas de logique d'authentification) :
- WebmailController : route /webmail, render login.html.twig
- templates/webmail/login.html.twig : formulaire email + password,
  design glassmorphism avec header Esy-Mail (icône enveloppe SVG),
  labels accessibles (for/id), autocomplete email/current-password,
  flash messages support, footer SARL SITECONSEIL

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

src/Controller/WebmailController.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Controller;
+
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+
+#[Route('/webmail', name: 'app_webmail_')]
+class WebmailController extends AbstractController
+{
+    #[Route('', name: 'login')]
+    public function login(): Response
+    {
+        return $this->render('webmail/login.html.twig');
+    }
+}

templates/webmail/login.html.twig

@@ -0,0 +1,67 @@
+{% extends 'base.html.twig' %}
+
+{% block title %}Esy-Mail - Connexion{% endblock %}
+{% block description %}Connectez-vous a votre messagerie Esy-Mail.{% endblock %}
+
+{% block header %}
+    <header class="sticky top-0 z-50 glass-heavy" style="border-radius: 0;">
+        <div class="flex justify-center items-center h-16">
+            <a href="{{ path('app_home') }}" aria-label="CRM SITECONSEIL - Accueil">
+                <img class="h-10 md:h-12 w-auto" src="{{ 'logo_facture.png' | imagine_filter('logo') }}" alt="CRM SITECONSEIL" loading="eager">
+            </a>
+        </div>
+    </header>
+{% endblock %}
+
+{% block body %}
+<div class="flex items-center justify-center min-h-[calc(100vh-4rem)] px-4">
+    <div class="w-full max-w-sm">
+
+        {% for label, messages in app.flashes %}
+            {% for message in messages %}
+                <div class="mb-4 p-4 glass border text-sm font-medium rounded-xl {{ label == 'error' ? 'border-red-300 text-red-800' : 'border-green-300 text-green-800' }}">
+                    {{ message }}
+                </div>
+            {% endfor %}
+        {% endfor %}
+
+        <div class="glass-heavy overflow-hidden">
+            <div class="glass-dark text-white px-6 py-4 text-center" style="border-radius: 16px 16px 0 0;">
+                <div class="flex items-center justify-center gap-3">
+                    <svg xmlns="http://www.w3.org/2000/svg" class="h-6 w-6 text-[#fabf04]" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
+                        <path stroke-linecap="round" stroke-linejoin="round" d="M3 8l7.89 5.26a2 2 0 002.22 0L21 8M5 19h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v10a2 2 0 002 2z" />
+                    </svg>
+                    <span class="text-sm font-bold uppercase tracking-widest">Esy-Mail</span>
+                </div>
+                <p class="text-xs text-gray-400 mt-1">Messagerie professionnelle securisee</p>
+            </div>
+
+            <div class="p-8">
+                <form method="post" action="{{ path('app_webmail_login') }}" class="flex flex-col gap-5">
+                    <div>
+                        <label for="webmail-email" class="block text-xs font-bold uppercase tracking-wider mb-2 text-gray-600">Adresse email</label>
+                        <input type="email" id="webmail-email" name="email" required autocomplete="email"
+                               class="input-glass w-full px-4 py-3 text-sm font-medium"
+                               placeholder="vous@siteconseil.fr">
+                    </div>
+
+                    <div>
+                        <label for="webmail-password" class="block text-xs font-bold uppercase tracking-wider mb-2 text-gray-600">Mot de passe</label>
+                        <input type="password" id="webmail-password" name="password" required autocomplete="current-password"
+                               class="input-glass w-full px-4 py-3 text-sm font-medium"
+                               placeholder="••••••••">
+                    </div>
+
+                    <button type="submit" class="btn-gold w-full px-6 py-3 text-sm font-bold uppercase tracking-wider text-gray-900">
+                        Connexion a ma messagerie
+                    </button>
+                </form>
+            </div>
+        </div>
+
+        <p class="text-center text-xs text-gray-400 mt-6">
+            Propulse par <strong>Esy-Mail</strong> &mdash; SARL SITECONSEIL
+        </p>
+    </div>
+</div>
+{% endblock %}