1072643169 master

[beto-rodriguez]

Fixes #1984, merges #1985 to dev, just to run the new tests that were not available when #1984 was created.

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[Copilot]

Pull request overview

Updates SkiaSharp rendering startup behavior to prevent transparent chart backgrounds (particularly in Avalonia) from clearing the underlying OS surface and visually “punching through” to the desktop (issue #1984).

Changes:

• Wraps the initial Canvas.Clear(Background) call in a SaveLayer()/Restore() pair to isolate clears from the underlying surface.

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[Copilot]

@beto-rodriguez I've opened a new pull request, #2091, to work on those changes. Once the pull request is ready, I'll request review from you.