The notebook should have up to 5 pages. Starting on page 1, the user can enter text into the page. The text should be saved. The user should be able to navigate to each of the 5 pages and enter text onto each page. If the user refreshes the browser page, the text should persist. If the user opens a new tab with the web app in it, the new notebook should behave like a separate notebook with its own pages/text.