test: add open login modal test

tests/login.spec.ts

@@ -0,0 +1,17 @@
+import { test, expect, type Page } from '@playwright/test';
+import { loadPage } from './libs/load-page';
+
+loadPage();
+
+test.describe('Login Flow', () => {
+  test('Open Login Modal', async ({ page }) => {
+    await page.getByTestId('current-workspace').click();
+    await page.waitForTimeout(800);
+    // why don't we use waitForSelector, It seems that waitForSelector not stable?
+    await page.getByTestId('open-login-modal').click();
+    await page.waitForTimeout(800);
+    await page
+      .getByRole('heading', { name: 'Currently not logged in' })
+      .click();
+  });
+});