fix: update E2E test selectors and improve login stability

- Fix selectors to use config keys instead of Chinese labels
- Add page load waiting and element visibility checks
- Improve global setup with better error handling
- Update all config-linkage tests with correct selectors

e2e/global-setup.ts

@@ -16,7 +16,12 @@ async function globalSetup(config: FullConfig) {
     console.log('📝 访问登录页面...');
     await page.goto(`${env.baseURL}/admin/login`, { waitUntil: 'networkidle' });
     
+    console.log('⏳ 等待页面加载...');
+    await page.waitForLoadState('domcontentloaded', { timeout: 10000 });
+    await page.waitForTimeout(2000);
+    
     console.log('🔑 填写登录信息...');
+    await page.waitForSelector('#email', { timeout: 10000 });
     await page.locator('#email').fill('admin@novalon.cn');
     await page.locator('#password').fill('admin123456');
     
@@ -32,7 +37,7 @@ async function globalSetup(config: FullConfig) {
     } catch (error) {
       console.log('❌ 登录超时，当前URL:', page.url());
       console.log('📸 截图保存...');
-      await page.screenshot({ path: 'test-results/login-failure.png' });
+      await page.screenshot({ path: 'test-results/login-failure.png', fullPage: true });
       throw error;
     }