fix: increase lyra sideButtonHintsWidth to 30 (#727)

## Summary

Increase the width of Lyra's side button hints. It has been set to 30,
the same width as the classic theme.


Before:
<img width="457" height="742" alt="image"
src="https://github.com/user-attachments/assets/316e4679-fbf0-4f6e-b117-413075da1be2"
/>

After:
<img width="512" height="849" alt="image"
src="https://github.com/user-attachments/assets/3b0cf069-55ad-4d5a-a93c-4aeca3ff67f8"
/>



## Additional Context

Resolves
https://github.com/crosspoint-reader/crosspoint-reader/pull/700#issuecomment-3856983832

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### AI Usage

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Did you use AI tools to help write this code?
No