flo269 7387baace4 Remove gamma value lower limit to enable inverse gamma correction (#5187) ...

* Enable inverse gamma correction (gamma < 1.0)

Allow gamma values from 0.1 to 3.0 instead of restricting to > 1.0.
This enables inverse gamma curves for use cases requiring brightened
mid-tones and compressed highlights.

Changes:
- Update backend validation in set.cpp and cfg.cpp to accept 0.1-3.0
- Update HTML form min value from 1 to 0.1

Co-authored-by: Flo <flo@Mac.lan>
Co-authored-by: Damian Schneider <daedae@gmx.ch>

2026-02-08 17:53:54 +01:00

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