pref: 权限校验中 - 显示占位骨架，不显示登录按钮或用户菜单，/home页面添加骨架屏逻辑

src/components/Navbars/components/NavbarActions/index.js

@@ -2,7 +2,7 @@
 // Navbar 右侧功能区组件
 
 import React, { memo } from 'react';
-import { HStack, Spinner, IconButton, Box } from '@chakra-ui/react';
+import { HStack, IconButton, Box } from '@chakra-ui/react';
 import { HamburgerIcon } from '@chakra-ui/icons';
 // import ThemeToggleButton from '../ThemeToggleButton'; // ❌ 已删除 - 不再支持深色模式切换
 import LoginButton from '../LoginButton';
@@ -41,9 +41,15 @@ const NavbarActions = memo(({
 }) => {
     return (
         <HStack spacing={{ base: 2, md: 4 }}>
-            {/* 显示加载状态 */}
+            {/* 权限校验中 - 显示占位骨架，不显示登录按钮或用户菜单 */}
             {isLoading ? (
-                <Spinner size="sm" color="blue.500" />
+                <Box
+                    w={{ base: '80px', md: '120px' }}
+                    h="36px"
+                    borderRadius="md"
+                    bg="whiteAlpha.100"
+                    opacity={0.6}
+                />
             ) : isAuthenticated && user ? (
                 // 已登录状态 - 用户菜单 + 功能菜单排列
                 <HStack spacing={{ base: 2, md: 3 }}>