Add profile routes to backend and frontend; implement user state handling for holidays and workdays, and update UI components for profile settings

frontend/src/router/index.js

@@ -16,6 +16,7 @@ import Sick from '../views/Sick.vue'
 import Workdays from '../views/Workdays.vue'
 import Calendar from '../views/Calendar.vue'
 import Holidays from '../views/Holidays.vue'
+import Profile from '../views/Profile.vue'
 
 const router = createRouter({
   history: createWebHistory(import.meta.env.BASE_URL),
@@ -98,6 +99,12 @@ const router = createRouter({
       component: Holidays,
       meta: { requiresAuth: true, requiresAdmin: true }
     },
+    {
+      path: '/settings/profile',
+      name: 'settings-profile',
+      component: Profile,
+      meta: { requiresAuth: true }
+    },
     {
       path: '/entries',
       name: 'entries',