Update dependencies to include TinyMCE and Quill, enhance Navigation component with a new Newsletter submenu, and implement role-based access control for CMS features. Refactor user role handling to support multiple roles and improve user management functionality across various API endpoints.

pages/login.vue

@@ -125,7 +125,8 @@ const handleLogin = async () => {
       
       // Redirect based on role
       setTimeout(() => {
-        if (response.user.role === 'admin' || response.user.role === 'vorstand') {
+        const roles = response.user.roles || (response.user.role ? [response.user.role] : [])
+        if (roles.includes('admin') || roles.includes('vorstand') || roles.includes('newsletter')) {
           router.push('/cms')
         } else {
           router.push('/mitgliederbereich')