Bugfixes & Menu changes

[Jones8683]

Summary

Fixes a few inconsistencies, then fixes some menu problems by moving and changing buttons as they were weird before.

Motivation

• Feature
• Bug fix
• Refactor (no functional changes)
• Style (formatting, naming)
• Other

What Changed

• Fixed a couple random bugs
• Removed duplicated URL opening code
• Moved the premium status banner into a single control instead of 5 copies scattered across screens, fixing a dismiss button that never actually worked
• Move external links onto the About page instead of duplicated across Home in weird ways and like 3 different styles

Additional Information

Checklist

• Code changes are manually tested and working.
• Formatting and naming are consistent with the project.
• Self-review of changes is done.
• AI tools were used (if yes, I reviewed and fully understand the changes myself).