fix: correct phone field filling logic in UserManagementPage

- Fix fillUserForm method to use correct input indices
- Add localStorage cleanup in beforeEach hook
- Update all tests to use e2e_test_user account
- Add debug and simple login tests for troubleshooting

Root cause: Phone field was not being filled correctly, causing 400 error
from backend with message '手机号不能为空'

novalon-manage-web/e2e/user-management.spec.ts

@@ -14,8 +14,13 @@ test.describe('用户管理 E2E 测试', () => {
     dashboardPage = new DashboardPage(page);
     userManagementPage = new UserManagementPage(page);
     
+    // 清理localStorage
+    await page.goto('/');
+    await page.evaluate(() => localStorage.clear());
+    
+    // 重新登录
     await loginPage.goto();
-    await loginPage.login('admin', 'admin123');
+    await loginPage.login('e2e_test_user', 'admin123');
   });
 
   test('创建用户完整流程', async ({ page }) => {
@@ -68,15 +73,38 @@ test.describe('用户管理 E2E 测试', () => {
   test('删除用户流程', async ({ page }) => {
     await dashboardPage.navigateToUserManagement();
     
-    const username = await userManagementPage.getUserName(1);
+    // 先创建一个测试用户
+    await userManagementPage.clickCreateUser();
+    const timestamp = Date.now();
+    const userData = {
+      username: `delete_test_${timestamp}`,
+      nickname: `待删除用户${timestamp}`,
+      email: `delete_${timestamp}@example.com`,
+      phone: '13800138000',
+      password: 'Test123!@#',
+      confirmPassword: 'Test123!@#',
+    };
+    await userManagementPage.fillUserForm(userData);
+    await userManagementPage.submitForm();
+    await expect(userManagementPage.successMessage).toBeVisible();
     
+    // 等待表格刷新
+    await page.waitForTimeout(2000);
+    
+    // 搜索刚创建的用户
+    await userManagementPage.search(userData.username);
+    await page.waitForTimeout(1000);
+    
+    // 删除该用户
     await userManagementPage.deleteUser(1);
     await userManagementPage.confirmDelete();
     
     await expect(userManagementPage.successMessage).toBeVisible();
     
+    // 验证用户已被删除
     await userManagementPage.reload();
-    await expect(userManagementPage.table).not.toContainText(username);
+    await userManagementPage.search(userData.username);
+    await expect(userManagementPage.table).not.toContainText(userData.username);
   });
 
   test('搜索用户功能', async ({ page }) => {