Fix NativeAOT NullReferenceException in GNOME views

[Copilot]

In NativeAOT mode, the trimmer strips private field reflection metadata by default. Gtk.Builder.ConnectFields() uses Type.GetFields(BindingFlags.NonPublic | ...) to populate [Gtk.Connect]-annotated fields — in NativeAOT this returns an empty array, leaving all connected widgets as null and causing a NullReferenceException on first access.

Changes

• MainWindow.cs / PreferencesDialog.cs: Added [DynamicDependency(DynamicallyAccessedMemberTypes.NonPublicFields, typeof(T))] to the private chained constructors (where _builder.Connect(this) is called), instructing the NativeAOT trimmer to preserve non-public field reflection metadata for these types.

[DynamicDependency(DynamicallyAccessedMemberTypes.NonPublicFields, typeof(MainWindow))]
private MainWindow(..., Gtk.Builder builder) : base(...)
{
    // ...
    _builder.Connect(this); // now correctly resolves [Gtk.Connect]-annotated fields
    // ...
    _windowTitle!.Title = _appInfo.ShortName; // no longer null
}

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• crl.godaddy.com
  • Triggering command: /usr/bin/dotnet dotnet restore --no-dependencies /tmp/codeql-scratch-297de09d6e55df2d/dbs/csharp/working/1D28AAEF2CB9C63BCE9DBD21A68FB8D9/missingpackages_workingdir --packages /tmp/codeql-scratch-297de09d6e55df2d/dbs/csharp/working/missingpackages /p:DisableImplicitNuGetFallbackFolder=true --verbosity normal --configfile /tmp/codeql-scratch-297de09d6e55df2d/dbs/csharp/working/nugetconfig/nuget.config --force (dns block)
• https://api.github.com/repos/gircore/gir.core/contents/src/Libs/Gtk-4.0/Public/Builder.cs
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• ocsp.godaddy.com
  • Triggering command: /usr/bin/dotnet dotnet restore --no-dependencies /tmp/codeql-scratch-297de09d6e55df2d/dbs/csharp/working/1D28AAEF2CB9C63BCE9DBD21A68FB8D9/missingpackages_workingdir --packages /tmp/codeql-scratch-297de09d6e55df2d/dbs/csharp/working/missingpackages /p:DisableImplicitNuGetFallbackFolder=true --verbosity normal --configfile /tmp/codeql-scratch-297de09d6e55df2d/dbs/csharp/working/nugetconfig/nuget.config --force (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
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