Update error handling and simplify toast integration

Added `scrollToFirstError` utility to focus on the first error and improved error handling in `RelativeScheduler`. Replaced manual toast injection with PrimeVue’s `useToast` for clarity and removed obsolete code. Upgraded to Vue 3.5.13 to ensure compatibility.

package.json

@@ -35,7 +35,7 @@
     "primevue": "3.46.0",
     "quill": "^2.0.3",
     "starwars-names": "1.6.0",
-    "vue": "3.4.31",
+    "vue": "3.5.13",
     "vue-cal": "^4.10.0",
     "vue-i18n": "10.0.5",
     "vue-router": "4.4.0"
@@ -44,7 +44,7 @@
     "@babel/core": "7.24.8",
     "@headlessui/vue": "1.7.22",
     "@heroicons/vue": "2.1.5",
-    "@intlify/unplugin-vue-i18n": "^6.0.0",
+    "@intlify/unplugin-vue-i18n": "^6.0.1",
     "@openapitools/openapi-generator-cli": "2.13.9",
     "@tailwindcss/aspect-ratio": "0.4.2",
     "@tailwindcss/forms": "0.5.7",

src/App.vue

@@ -4,15 +4,12 @@ Prevention -- A research institute of the Ludwig Boltzmann Gesellschaft,
 Oesterreichische Vereinigung zur Foerderung der wissenschaftlichen Forschung).
 Licensed under the Elastic License 2.0. */
 <script setup lang="ts">
-  import { ref, provide } from 'vue';
   import Toast from 'primevue/toast';
   import Footer from './components/shared/Footer.vue';
   import Header from './components/shared/Header.vue';
   import { useRouter } from 'vue-router';
 
   const router = useRouter();
-  const toast = ref<Toast | null>(null);
-  provide('toast', toast);
 
   router.beforeEach((to) => {
     document.title = to.meta?.title ? to.meta.title + ' (More)' : 'More';
@@ -23,7 +20,7 @@ Licensed under the Elastic License 2.0. */
   <Header />
   <main class="mb-20 pt-14">
     <router-view />
-    <Toast ref="toast" />
+    <Toast />
   </main>
   <Footer />
 </template>