Drawing.PartColors (a public array aliasing the active scheme's), Drawing.UseGoldenAngleColors and a non-atomic colour counter were process-global display state. PartPalette now holds a copy of the colours and the golden-angle flag; PartColorPalette.Current/Use swap it as a whole, Drawing.GetPartColor/GetNextColor read it, and the counter increments atomically. Colours shown are unchanged.
Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>
ColorScheme, ColorSchemeRegistry, ColorSchemeSerializer and the Schemes
folder move into the toolkit-neutral library, keeping the OpenNest
namespace, so the Avalonia app can share the built-in palettes, the
scheme files and the recolour-on-open rule.
ColorScheme is now pure colour data with a Version that changes with
any colour. Its GDI+ pens and brushes move to GdiSchemeTools in the
WinForms project (still one set per thread, rebuilt after a colour
change), reached through scheme.Gdi(). The legacy part outline uses
ColorShade.Dark, a port of ControlPaint.Dark's HLS arithmetic; a
WinForms test compares the two across a colour sweep on Windows.
The registry no longer walks Application.OpenForms: Apply raises
Applied, and EditNestForm subscribes once to recolour every open nest
window as before. The saved scheme is read under the same
ActiveColorScheme setting (SavedSchemeName/ApplySaved for the shared
user-settings file); WinForms still reads it through Settings.Default.
Schemes/*.json now copies beside both desktop apps from OpenNest.Desktop.
Pure scheme tests move to OpenNest.Desktop.Tests, with new ones for
built-in round trips, scheme files, bad files, the saved name and the
recolour rule.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>