feat: Remove backend cookie and use frontend for auth (#6601)

frontend/layouts/blank.vue

@@ -3,11 +3,11 @@
     <TheSnackbar />
 
     <v-banner
-      v-if="isDemo"
+      v-if="$appInfo.demoStatus"
       sticky
     >
       <div class="text-center">
-        <b> {{ $t("demo.info_message_with_version", { version: version }) }} </b>
+        <b> {{ $t("demo.info_message_with_version", { version: $appInfo.version }) }} </b>
       </div>
     </v-banner>
 
@@ -23,24 +23,8 @@
 
 <script lang="ts">
 import TheSnackbar from "~/components/Layout/LayoutParts/TheSnackbar.vue";
-import { useAppInfo } from "~/composables/api";
-import { useGlobalI18n } from "~/composables/use-global-i18n";
 
 export default defineNuxtComponent({
   components: { TheSnackbar },
-  setup() {
-    const appInfo = useAppInfo();
-
-    const isDemo = computed(() => appInfo?.value?.demoStatus || false);
-
-    const i18n = useGlobalI18n();
-    const version = computed(() => appInfo?.value?.version || i18n.t("about.unknown-version"));
-
-    return {
-      appInfo,
-      isDemo,
-      version,
-    };
-  },
 });
 </script>