Module frontend/ts/public/color

Color domain public surface.

Responsibility:

• Mapping music/pitch features to color policy decisions.
• Phase/tween utilities for stable visual color behavior.

Non-responsibilities:

• Rendering details.
• Asset/UI glue.

Start here:

• PitchColorPolicy
• PitchColorPhaseController
• PaletteTween

Invariants:

• Determinism depends on configured tuning and inputs.