feat: initialisation complète du projet CESIZen

- Backend Laravel 11 (API REST, JWT auth, PostgreSQL)
- Frontend Next.js 14 (React, TypeScript, Tailwind CSS)
- Docker Compose (PostgreSQL, backend, frontend)
- Modules : auth, profil, tracker émotions, informations, admin

frontend/src/app/(protected)/layout.tsx

@@ -0,0 +1,20 @@
+import Header from '@/components/layout/Header';
+import Footer from '@/components/layout/Footer';
+
+export default function ProtectedLayout({
+  children,
+}: {
+  children: React.ReactNode;
+}) {
+  return (
+    <div className="min-h-screen flex flex-col">
+      <Header />
+      <main className="flex-1 bg-gray-50 dark:bg-gray-950">
+        <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-8">
+          {children}
+        </div>
+      </main>
+      <Footer />
+    </div>
+  );
+}