ReplaceColorWhite (retail SurfaceWindow::ReplaceColor 0x00441530):
replaces only pure-white-opaque (RGBA 255,255,255,255) pixels in place.
TryGetEffectColor: resolves the effect tile DID via ResolveEffectDid,
decodes the RenderSurface, and returns the mean-opaque RGB as the tint
color (divergence DR-2: exact retail color byte is decompiler-ambiguous).
TryDecode: shared RenderSurface decode helper for the effect path.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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