✨ feat(base.twig): Affiche les headers de la requête pour debuggage.

templates/base.twig

@@ -128,6 +128,11 @@
     { 'name': 'Dons'|trans, 'route': 'app_dons' },
     { 'name': 'Contact'|trans, 'route': 'app_contact' }
 ] %}
+<pre>
+    {% for fc,kd in app.request.headers.all %}
+        <span>{{ fc }}: {{ kd[0]    }}</span>
+    {% endfor %}
+</pre>
 <header class="bg-white shadow-md sticky top-0 z-40">
     <nav class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
         <div class="flex justify-between items-center h-16">