NavigationView selection indicator animation has problems

[IsaacMarovitz]

Describe the bug The new selection indicator animation does not work as intended when selecting items that are not directly adjacent to the current selection.

https://github.com/user-attachments/assets/27b5a305-bd84-4cc1-9e89-0de15ac19173

Desktop/Platform (please complete the following information):

• OS: macOS
• FluentAvalonia Version 2.1.0
• Avalonia Version 11.1.1

Additional context Add any other context about the problem here.

[IsaacMarovitz]

Bar animation also sometimes leaves behind artefacts (see CPU)

[amwx]

For the main issue here, this is flaws in the CompositionAnimation system, which may or may not be fixed - who knows. I believe I have this set up to check FAUISettings for animations (so you can disable it there if its really an issue).

As for the artifacts issue, that's well known and is related to Skia and its ability to render rounded rectangles - nothing I can really do there.