Unstarted quiz page opened from learner summary opens empty and is unclear

[radinamatic]

Observed behavior

Observed while testing #13037 (comment): clicking on a not started quiz (meaning that is still not available to learners) appears as if there are no questions in it.

My suggestion would be to at least add a string Quiz not started to palliate a bit the blank page and make the quiz report more clear.

recording	screenshot
https://github.com/user-attachments/assets/6db08d5a-fe08-4f9d-a8ec-696fd0ee6704

Errors and logs

…

Expected behavior

User properly notified that the quiz they opened is not started.

User-facing consequences

Confusion and thinking that the quiz is somehow broken (and not just not-started) since no questions appear.

Steps to reproduce

• make sure that there is one quiz assigned to learner that has not been started
• go to Coach - Learners, and click to open the quiz that has not been started

Context

• Kolibri version: 0.18
• Operating system: all
• Browser: all

[IAlgorithmia]

@radinamatic I'm ready to tackle this issue - can you assign it my way?

[MisRob]

Hi @IAlgorithmia, this issue is not available. You're welcome to find an unassigned 'help wanted' issue instead. There aren't many available issues right now so it's best to wait and keep an eye on the list. We label new ones on a weekly basis. I'd also invite you to have a look at the contributing guidelines if you haven't seen them yet. Thank you