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/pages/UserManagementPage.ts

@@ -43,17 +43,31 @@ export class UserManagementPage {
     status?: string;
   }) {
     const dialog = this.page.locator('.el-dialog');
+    const isCreateMode = !userData.hasOwnProperty('id');
+    
+    // 表单字段顺序：
+    // 创建模式：用户名(0), 密码(1), 昵称(2), 邮箱(3), 手机号(4)
+    // 编辑模式：用户名(0), 昵称(1), 邮箱(2), 手机号(3)
+    
     await dialog.locator('input').first().fill(userData.username);
-    if (userData.nickname) {
-      await dialog.locator('input').nth(1).fill(userData.nickname);
+    
+    if (isCreateMode && userData.password) {
+      await dialog.locator('input[type="password"]').fill(userData.password);
     }
-    await dialog.locator('input[type="password"]').fill(userData.password);
-    await dialog.locator('input').nth(3).fill(userData.email);
+    
+    if (userData.nickname) {
+      const nicknameIndex = isCreateMode ? 2 : 1;
+      await dialog.locator('input').nth(nicknameIndex).fill(userData.nickname);
+    }
+    
+    if (userData.email) {
+      const emailIndex = isCreateMode ? 3 : 2;
+      await dialog.locator('input').nth(emailIndex).fill(userData.email);
+    }
+    
     if (userData.phone) {
-      const phoneInput = dialog.locator('input[placeholder*="手机号"]');
-      if (await phoneInput.count() > 0) {
-        await phoneInput.fill(userData.phone);
-      }
+      const phoneIndex = isCreateMode ? 4 : 3;
+      await dialog.locator('input').nth(phoneIndex).fill(userData.phone);
     }
     
     if (userData.status) {