fix text spacing in Continue {episode} - detail page

Brief summary

text spacing for the Continue button is irregular in every extensions. please have a look at this bug and possibly looking forward for an stable fix.

Screenshot:

Steps to reproduce

Miru version

https://github.com/miru-project/miru-app/actions/runs/7577333370

Device

Lenovo ideapad (Windows 10)

Acknowledgements

• I have searched the existing issues and this is a new ticket, NOT a duplicate or related to another open issue.
• If this is an issue with a extension, I should be opening an issue in the extension repository.