fix(core): improve doc title and icon display (#9755)

Closes: [AF-2132](https://linear.app/affine-design/issue/AF-2132/优化-emoji-title-和-icon-显示)

tests/kit/src/utils/page-logic.ts

@@ -76,6 +76,21 @@ export const createLinkedPage = async (page: Page, pageName?: string) => {
     .click();
 };
 
+export const createTodayPage = async (page: Page) => {
+  // fixme: workaround for @ popover not showing up when editor is not ready
+  await page.waitForTimeout(500);
+  await page.keyboard.type('@', { delay: 50 });
+  const linkedPagePopover = page.locator('.linked-doc-popover');
+  await expect(linkedPagePopover).toBeVisible();
+  await type(page, 'Today');
+
+  await linkedPagePopover
+    .locator(`icon-button`)
+    .filter({ hasText: 'Today' })
+    .nth(0)
+    .click();
+};
+
 export async function clickPageMoreActions(page: Page) {
   return page
     .getByTestId('header')