refactor(vue): migrate app, routes, and tooling from Svelte

Replace the Svelte runtime, Vite plugin, Storybook adapter, and component files with Vue 3 equivalents while preserving the existing route table, page markup, styling, assets, deployment shape, and npm workflows.

Move shared and page-level state onto Vue refs, computed values, lifecycle hooks, and script setup components. Recreate the custom async router and translation composable as Vue-native modules so navigation and bilingual content continue to work without introducing a router or state-management dependency.

Adopt the maintained @lucide/vue package, remove the Svelte icon and map wrappers, and initialize MapLibre directly on the Helpdesk page. Replace the Svelte CSF story with a Vue Storybook story, remove obsolete aliases and generation/config files, and update the audited lockfile with no known vulnerabilities.

src/components/layout/Center.vue

@@ -0,0 +1,16 @@
+<script setup>
+  defineOptions({ inheritAttrs: false });
+  defineProps({
+    dir: { type: String, default: 'row' },
+    gap: { type: String, default: 'gap-4' },
+  });
+</script>
+
+<template>
+<div
+  :class="['flex items-center justify-center', dir === 'row' ? 'flex-row' : 'flex-col', gap, $attrs.class]"
+  v-bind="$attrs"
+>
+  <slot />
+</div>
+</template>