fix: some minor ui issues (#1783)

tests/parallels/subpage.spec.ts

@@ -10,6 +10,6 @@ test.describe('subpage', () => {
     await waitMarkdownImported(page);
     await page.getByTestId('sliderBar-arrowButton-collapse').click();
     const sliderBarArea = page.getByTestId('sliderBar-inner');
-    await expect(sliderBarArea).not.toBeVisible();
+    await expect(sliderBarArea).not.toBeInViewport();
   });
 });