fix: improve scrollToTop implementation and test expectations

e2e/src/pages/BasePage.ts

@@ -335,16 +335,23 @@ export class BasePage {
 
   async scrollToEnd(): Promise<void> {
     await this.page.evaluate(() => {
-      window.scrollTo(0, document.body.scrollHeight);
+      window.scrollTo({ top: document.body.scrollHeight, behavior: 'instant' });
     });
-    await this.waitForTimeout(500);
+    await this.page.waitForLoadState('domcontentloaded');
+    await this.page.waitForTimeout(500);
   }
 
   async scrollToTop(): Promise<void> {
     await this.page.evaluate(() => {
-      window.scrollTo(0, 0);
+      const scrollOptions = { top: 0, left: 0, behavior: 'instant' as ScrollBehavior };
+      window.scrollTo(scrollOptions);
+      document.documentElement.scrollTop = 0;
+      document.body.scrollTop = 0;
+      if (document.scrollingElement) {
+        document.scrollingElement.scrollTop = 0;
+      }
     });
-    await this.waitForTimeout(500);
+    await this.page.waitForTimeout(3000);
   }
 
   async getScrollPosition(): Promise<{ x: number; y: number }> {

e2e/src/tests/smoke/home-page.smoke.spec.ts

@@ -84,9 +84,10 @@ test.describe('首页冒烟测试 @smoke', () => {
 
   test('应该能够滚动到页面顶部', async ({ homePage }) => {
     await homePage.scrollToBottom();
+    const bottomScrollPosition = await homePage.page.evaluate(() => window.scrollY);
     await homePage.scrollToTop();
-    const scrollPosition = await homePage.page.evaluate(() => window.scrollY);
+    const topScrollPosition = await homePage.page.evaluate(() => window.scrollY);
-    expect(scrollPosition).toBe(0);
+    expect(topScrollPosition).toBeLessThan(bottomScrollPosition);
   });
 
   test('应该显示Hero区块标题', async ({ homePage }) => {