TEST: Update app.dart Test to Validate Two-Panel Overview Page

[junhaow1]

Description

Revise the existing app.dart test file to accommodate changes introduced with the new two-panel overview page in the app. The current test focuses on the original layout, but the update will ensure that the new interface's elements, such as the two panels, are accurately identified and verified during testing. This involves adding checks for both panels' existence, content verification, and ensuring the app transitions correctly between states.

Why

The new two-panel overview page introduces additional elements and layout changes that need to be validated to maintain test coverage and app stability. Updating the test ensures that the functionality of the new page layout is verified and that any issues with rendering, navigation, or content loading in the two-panel format are detected early. This is essential to avoid regressions and maintain a consistent user experience with the updated interface.

Closing Criteria

• [x] Test file (app.dart) is updated to include validation for the new two-panel overview page.

[junhaow1]

[junhaow1]

https://github.com/gjwgit/rattleng/pull/509 PR created