test(ui): enhance session management tests with new helper functions

- Updated the `verifyLogoutSuccess` function to use a regex for URL verification.
- Added new helper functions `getSession` and `verifySessionValid` to streamline session validation in tests, ensuring that session data is correctly retrieved and validated.

ui/tests/helpers.ts

@@ -101,7 +101,7 @@ export async function logout(page: Page) {
 }
 
 export async function verifyLogoutSuccess(page: Page) {
-  await expect(page).toHaveURL("/sign-in");
+  await expect(page).toHaveURL(/\/sign-in/);
   await expect(page.getByText("Sign in", { exact: true })).toBeVisible();
 }
 
@@ -173,3 +173,17 @@ export function makeSuffix(len: number): string {
   }
   return s.slice(0, len);
 }
+
+export async function getSession(page: Page) {
+  const response = await page.request.get("/api/auth/session");
+  return response.json();
+}
+
+export async function verifySessionValid(page: Page) {
+  const session = await getSession(page);
+  expect(session).toBeTruthy();
+  expect(session.user).toBeTruthy();
+  expect(session.accessToken).toBeTruthy();
+  expect(session.refreshToken).toBeTruthy();
+  return session;
+}