refactor: 移除用户存储及相关演示用户逻辑

app/pages/index.vue

@@ -2,25 +2,16 @@
 import { computed, ref, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { useHead, useSeoMeta } from '#imports'
-import { useUserStore } from '~/stores/user'
 import { useAppStore } from '~/stores/app'
 import { usePageScrollLock } from '~/composables/usePageScrollLock'
 import HomeIntro from '~/components/home/HomeIntro.vue'
 import HomeHero from '~/components/home/HomeHero.vue'
 
 const { t } = useI18n()
-const userStore = useUserStore()
 const appStore = useAppStore()
 
 const isIntroActive = ref(true)
 
-const demoUserName = computed(() => userStore.displayName)
-const demoUserRole = computed(() => userStore.role)
-
-if (!userStore.isLoggedIn) {
-  userStore.loadDemoUser()
-}
-
 // 保证即使 Lenis 还没加载完成，也能通过原生 CSS 锁定页面
 useHead({
   htmlAttrs: {
@@ -57,11 +48,7 @@ watch(() => appStore.isAppLoading, async (isLoading) => {
 </script>
 
 <template>
-  <main
-    id="top"
-    :data-demo-user="demoUserName"
-    :data-demo-user-role="demoUserRole"
-  >
+  <main id="top">
     <HomeIntro ref="homeIntroRef" />
     <HomeHero ref="homeHeroRef" />