test: add Stage 3-5 component and layout test coverage

Add tests for:
- PageLayout components: ContentCard, FilterCard, TableCard, TreeCard, PageLayout
- AuthLayout layout component
- LoginLogDetailDrawer and OperationLogDetailDrawer page components

All 518 tests pass across 82 test files.

frontend/admin/src/layouts/AuthLayout/AuthLayout.test.tsx

@@ -0,0 +1,49 @@
+import { render, screen } from '@testing-library/react'
+import { describe, expect, it } from 'vitest'
+
+import { AuthLayout } from './AuthLayout'
+
+describe('AuthLayout', () => {
+  it('renders children in the form area', () => {
+    render(
+      <AuthLayout>
+        <div>login form</div>
+      </AuthLayout>,
+    )
+
+    expect(screen.getByText('login form')).toBeInTheDocument()
+  })
+
+  it('displays the brand title', () => {
+    render(
+      <AuthLayout>
+        <div>content</div>
+      </AuthLayout>,
+    )
+
+    expect(screen.getByText('用户管理系统')).toBeInTheDocument()
+  })
+
+  it('displays brand description', () => {
+    render(
+      <AuthLayout>
+        <div>content</div>
+      </AuthLayout>,
+    )
+
+    expect(screen.getByText('企业级用户管理解决方案')).toBeInTheDocument()
+  })
+
+  it('displays feature list', () => {
+    render(
+      <AuthLayout>
+        <div>content</div>
+      </AuthLayout>,
+    )
+
+    expect(screen.getByText('支持多种登录方式')).toBeInTheDocument()
+    expect(screen.getByText('基于角色的权限控制')).toBeInTheDocument()
+    expect(screen.getByText('完整的审计日志')).toBeInTheDocument()
+    expect(screen.getByText('安全的双因素认证')).toBeInTheDocument()
+  })
+})