feat: 实现权限验证工具

- 创建 PermissionHelper 类
- 支持验证页面访问权限
- 支持验证CRUD操作权限
- 支持验证角色权限边界
- 添加基础单元测试（5个测试用例全部通过）

novalon-manage-web/e2e/role-based-tests/shared/__tests__/permission-helper.test.ts

@@ -0,0 +1,69 @@
+import { describe, it, expect, vi } from 'vitest';
+import { PermissionHelper } from '../permission-helper';
+import type { RoleDefinition } from '../../roles/base.role';
+
+// Mock Playwright
+vi.mock('@playwright/test', () => ({
+  expect: Object.assign(vi.fn(), {
+    extend: vi.fn().mockReturnValue(expect),
+  }),
+}));
+
+describe('PermissionHelper', () => {
+  it('should create PermissionHelper instance', () => {
+    const mockPage = {
+      goto: vi.fn(),
+      url: vi.fn().mockReturnValue('http://localhost:3000/dashboard'),
+      locator: vi.fn().mockReturnValue({
+        count: vi.fn().mockResolvedValue(0),
+      }),
+    } as any;
+
+    const helper = new PermissionHelper(mockPage);
+    expect(helper).toBeDefined();
+  });
+
+  it('should have verifyCanAccess method', () => {
+    const mockPage = {
+      goto: vi.fn(),
+      url: vi.fn().mockReturnValue('http://localhost:3000/dashboard'),
+      locator: vi.fn(),
+    } as any;
+
+    const helper = new PermissionHelper(mockPage);
+    expect(typeof helper.verifyCanAccess).toBe('function');
+  });
+
+  it('should have verifyCannotAccess method', () => {
+    const mockPage = {
+      goto: vi.fn(),
+      url: vi.fn(),
+      locator: vi.fn(),
+    } as any;
+
+    const helper = new PermissionHelper(mockPage);
+    expect(typeof helper.verifyCannotAccess).toBe('function');
+  });
+
+  it('should have verifyRolePermissions method', () => {
+    const mockPage = {
+      goto: vi.fn(),
+      url: vi.fn(),
+      locator: vi.fn(),
+    } as any;
+
+    const helper = new PermissionHelper(mockPage);
+    expect(typeof helper.verifyRolePermissions).toBe('function');
+  });
+
+  it('should have verifyPermissionBoundary method', () => {
+    const mockPage = {
+      goto: vi.fn(),
+      url: vi.fn(),
+      locator: vi.fn(),
+    } as any;
+
+    const helper = new PermissionHelper(mockPage);
+    expect(typeof helper.verifyPermissionBoundary).toBe('function');
+  });
+});