Adds punch_holes.slow_pulse cfg_json flag. When enabled, replaces the fast
2.5s linear hue-rotate with a 6s ease-in-out breathing animation that dims
(0.55 brightness) to bright (1.30) while shifting 180° of hue and back.
Same 120° phase offsets apply (2s apart). Form shows a Slow Pulse checkbox
below the slot cards whenever at least one slot has rainbow enabled.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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