[Bug] Two Fullscreen Buttons in Walkthrough Viewer

[jpotter08]

Summary

When viewing a walkthrough, there are two Fullscreen Buttons but only one works.

Steps to reproduce

1. Open a guide.
2. Press view walkthrough
3. Press Fullscreen button in corner, it works.
4. Press button below "-", it doesn't work.

Expected behavior

Either both buttons should work or one should be removed.

Actual behavior

Only the one of them works.

Version / commit

main

Area

app (frontend)

Confirmations

• I searched existing issues and this is not a duplicate.
• This is not a security vulnerability.