Floating panel in bottom-right of all dev targets lets you:
- Switch presets (Purple, Blue, Neutral, Warm, Rose, Emerald)
- Adjust gray hue/saturation and accent hue/saturation with sliders
- Preview color swatches in real-time
- Copy EDN config to paste into tokens.edn
State persists in localStorage. Panel collapses to a small toggle button.
Hiccup handler changed to use #'handler var for hot-reload.