Replace two calibration nodes with a single smart LCSLoadData that
fingerprints VAE weights (sha256 of first decoder weight) and
auto-manages cached calibration files as data/lcs_{fingerprint}.safetensors.
Selecting a preset now updates slider values in real-time via a
frontend JS extension, and users can tweak values after selecting.
Sliders are always visible (removed optional=True). Preset values
live only in JS (single source of truth); Python keeps just the
name list for the combo widget. Sync only fires on explicit user
dropdown interaction, preserving saved slider tweaks on workflow load.
The node now controls contrast, brightness, saturation, and color
temperature — "Contrast Adjust" was misleading. Adds 9 one-click
tonal presets (Cinematic, HDR, Vivid, Dramatic, Low Key, High Key,
Warm, Cool, Desaturated) plus Custom mode for manual slider control.
Operates directly in 3D LCS space by decomposing patches into lightness
(projection onto black→white achromatic axis) and chroma (perpendicular
residual). No HSL round-trip needed, making it faster than the color
intervention path.
facok