fix: check contact section existence after form submission

test-framework/dev-audit/forms/forms.spec.ts

@@ -39,9 +39,8 @@ test.describe('表单验证测试', () => {
     await contactPage.submitForm();
     await page.waitForTimeout(3000);
     
-    const submitButton = await page.locator('[data-testid="submit-button"]');
-    const buttonExists = await submitButton.count();
-    expect(buttonExists).toBeGreaterThan(0);
+    const contactSection = await page.locator('#contact').count();
+    expect(contactSection).toBeGreaterThan(0);
   });
 
   test('联系表单 - 必填字段验证', async ({ page }) => {