Phase 2: Avalonia GUI - #3

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-dotnet@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Do not use a Where clause to filter before calling Assert.Single. Use the overload of Assert.Single that accepts a filtering function. (https://xunit.net/xunit.analyzers/rules/xUnit2031)

Prefer 'static readonly' fields over constant array arguments if the called method is called repeatedly and is not mutating the passed array (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1861)

Prefer 'static readonly' fields over constant array arguments if the called method is called repeatedly and is not mutating the passed array (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1861)

Do not use a Where clause to filter before calling Assert.Single. Use the overload of Assert.Single that accepts a filtering function. (https://xunit.net/xunit.analyzers/rules/xUnit2031)

Prefer 'static readonly' fields over constant array arguments if the called method is called repeatedly and is not mutating the passed array (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1861)