feat: 添加用户头像和名称显示功能到顶部栏

frontend/portal/src/layout/AppTopbar.vue

@@ -94,9 +94,8 @@ onMounted(() => {
             <div class="layout-topbar-menu hidden lg:block">
                 <div class="layout-topbar-menu-content">
                     <template v-if="isLoggedIn">
-                        <button type="button" class="layout-topbar-action flex items-center gap-2"
-                            @click="toggleUserMenu">
-                            <Avatar shape="circle" size="large" class="bg-surface-200 dark:bg-surface-700" />
+                        <button type="button" class="layout-topbar-action layout-topbar-user" @click="toggleUserMenu">
+                            <Avatar shape="circle" class="bg-surface-200 dark:bg-surface-700" />
                             <span>{{ displayName }}</span>
                             <i class="pi pi-angle-down"></i>
                         </button>