refactor(i18n): strict type checking for SettingsPage component

Signed-off-by: Fernando Fernández <ferferga@hotmail.com>

frontend/src/components/Layout/SettingsPage.vue

@@ -19,5 +19,7 @@
 </template>
 
 <script setup lang="ts">
-defineProps<{ pageTitle?: string }>();
+import type { messages } from 'vue-i18n';
+
+defineProps<{ pageTitle?: keyof messages }>();
 </script>