[BUG] Avalonia UI: Missing Hamburger Expansion Animation

[Meteony]

Please confirm these before moving forward

• I have searched for my issue and have not found a work-in-progress/duplicate/resolved issue.
• I have tested that this issue has not been fixed in the latest (beta or stable) release.
• I have checked the FAQ section for solutions.
• This issue is about a bug (if it is not, please use the correct template).

UniGetUI Version

2026.2.1

Windows version, edition, and architecture

26220.8680

Describe your issue

WinUI original:

Current UI for comparison:

Steps to reproduce the issue

No response

UniGetUI Log

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Package Managers Logs

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Relevant information

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Screenshots and videos

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