v0.3.6

From Mira's Session 2 test: expanded color role vocabulary.

Fixed

• Color role enum expanded: Added tint, overlay, border, gradient, highlight to accepted roles in brand_clarify, core-identity schema, and CSS role inference. Agents no longer need to map tint/overlay colors to approximate roles — the system speaks their language now.
• CSS role inference: Color extractor detects tint/alpha, overlay, border/divider, gradient, and highlight/focus roles from CSS variable names automatically.

Improved

• brand_clarify param description lists all 12 valid roles so agents know the full vocabulary up front.