Add export routes to backend and frontend; implement routing and UI components for data export management

frontend/src/router/index.js

@@ -22,6 +22,7 @@ import Timewish from '../views/Timewish.vue'
 import Roles from '../views/Roles.vue'
 import Invite from '../views/Invite.vue'
 import Permissions from '../views/Permissions.vue'
+import Export from '../views/Export.vue'
 
 const router = createRouter({
   history: createWebHistory(import.meta.env.BASE_URL),
@@ -140,6 +141,12 @@ const router = createRouter({
       component: Permissions,
       meta: { requiresAuth: true }
     },
+    {
+      path: '/export',
+      name: 'export',
+      component: Export,
+      meta: { requiresAuth: true }
+    },
     {
       path: '/entries',
       name: 'entries',