feat: ajout onglet Contrats dans la sidebar admin

- Lien Contrats dans la sidebar (entre Clients et Facturation)
- Controller ContratController avec route /admin/contrats
- Template placeholder avec description du flow futur:
  creer contrat -> signer -> creation espace client auto

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

src/Controller/Admin/ContratController.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace App\Controller\Admin;
+
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+use Symfony\Component\Security\Http\Attribute\IsGranted;
+
+#[Route('/admin/contrats', name: 'app_admin_contrats_')]
+#[IsGranted('ROLE_EMPLOYE')]
+class ContratController extends AbstractController
+{
+    #[Route('', name: 'index')]
+    public function index(): Response
+    {
+        return $this->render('admin/contrats/index.html.twig');
+    }
+}

templates/admin/_layout.html.twig

@@ -49,6 +49,10 @@
                 <svg class="w-4 h-4 flex-shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M17 20h5v-2a3 3 0 00-5.356-1.857M17 20H7m10 0v-2c0-.656-.126-1.283-.356-1.857M7 20H2v-2a3 3 0 015.356-1.857M7 20v-2c0-.656.126-1.283.356-1.857m0 0a5.002 5.002 0 019.288 0M15 7a3 3 0 11-6 0 3 3 0 016 0z"/></svg>
                 Clients
             </a>
+            <a href="{{ path('app_admin_contrats_index') }}" class="sidebar-nav-item {{ current_route starts with 'app_admin_contrats' ? 'active' : '' }}">
+                <svg class="w-4 h-4 flex-shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z"/></svg>
+                Contrats
+            </a>
             <a href="{{ path('app_admin_facturation_index') }}" class="sidebar-nav-item {{ current_route starts with 'app_admin_facturation' ? 'active' : '' }}">
                 <svg class="w-4 h-4 flex-shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 14l6-6m-5.5.5h.01m4.99 5h.01M19 21V5a2 2 0 00-2-2H7a2 2 0 00-2 2v16l3.5-2 3.5 2 3.5-2 3.5 2z"/></svg>
                 Facturation

templates/admin/contrats/index.html.twig

@@ -0,0 +1,26 @@
+{% extends 'admin/_layout.html.twig' %}
+
+{% block title %}Contrats - Association E-Cosplay{% endblock %}
+
+{% block admin_content %}
+<div class="page-container">
+    <div class="flex items-center justify-between mb-6">
+        <h1 class="text-2xl font-bold heading-page">Contrats</h1>
+    </div>
+
+    {% for type, messages in app.flashes %}
+        {% for message in messages %}
+            <div class="mb-4 p-4 glass font-medium text-sm {{ type == 'success' ? 'border-green-300 text-green-800' : 'border-red-300 text-red-800' }}">{{ message }}</div>
+        {% endfor %}
+    {% endfor %}
+
+    <div class="glass p-12 text-center">
+        <svg xmlns="http://www.w3.org/2000/svg" class="h-16 w-16 mx-auto mb-4 text-gray-300" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="1">
+            <path stroke-linecap="round" stroke-linejoin="round" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
+        </svg>
+        <p class="text-gray-400 font-bold uppercase text-sm tracking-wider mb-2">Contrats</p>
+        <p class="text-gray-300 text-xs">Cette section sera disponible prochainement.</p>
+        <p class="text-gray-300 text-xs mt-1">Creez un contrat, faites-le signer, puis l'espace client sera cree automatiquement.</p>
+    </div>
+</div>
+{% endblock %}