HatangPalette
data class HatangPalette(val bg: Color, val surface: Color, val raised: Color, val elevated: Color, val border: Color, val borderStrong: Color, val fg: Color, val muted: Color, val dim: Color, val success: Color, val successSoft: Color, val warn: Color, val warnSoft: Color, val danger: Color, val dangerSoft: Color, val info: Color, val infoSoft: Color)
Colour palette (ported from the agent app's theme/tokens.ts).