feat(front) : modular nuxt config with app/ shell dirs and modules/* layer auto-detection

frontend/app/middleware/employee.ts

@@ -0,0 +1,9 @@
+export default defineNuxtRouteMiddleware(() => {
+    const auth = useAuthStore()
+
+    // "Mes absences" is reserved for users flagged as employees (subject to the
+    // absence management). Non-employees are redirected to the home page.
+    if (!auth.isAuthenticated || !auth.user?.isEmployee) {
+        return navigateTo('/')
+    }
+})