Engine rewrite:
- Remove fake Display P3 stage (sRGB->XYZ->P3 round-trip was a no-op
hiding a plain saturation multiply) and redundant strength multipliers
- Fix box blur: was a trailing window shifted diagonally with zero-padded
borders; now centered with edge replication
- Fix non-monotonic highlight soft-clip (banding above white)
- White balance and tone mapping in linear light (luminance-preserving)
- Smart HDR: Durand-style log-luminance base/detail local tone mapping
- Color science in Oklab: hue-preserving vibrance, real skin-tone
protection mask, subtle split-tone signature
- Single two-scale detail stage (texture + clarity) with tanh halo
suppression, replacing three overlapping sharpeners
- Photon-weighted grain, natural-falloff vignette in linear light
- 15 iPhone 17 Photographic Styles presets (moods + undertones + B&W)
- Delete dead camera_profiles.py
LUT engine: tetrahedral interpolation (industry standard) with chunked
memory-safe application; document that the Apple Log LUT expects log input
UI: rebuild for new params; sizing via getMinHeight/getMaxHeight +
computeSize (no more guessed heights), remount safety net for workflow
reload store clears, sanitize values restored by position from old saves
Tests: 16-case suite covering blur centering, Oklab round-trip, styles,
skin protection, tetrahedral exactness, node API
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
