Add Design Conventions page
Design-side sibling of API Conventions: the intention behind token
choices (foundations), standard state representations across component
archetypes, and how design quality is evaluated.
- Wire the Contributing Design Review section and Home index to the new page
- Component Auditor gains a Design Conventions dimension for the
objectively-checkable rules (spacing grid, concentric radius, contrast,
type hierarchy, motion safety, stacking); subjective visual judgment
stays in Hardening Layer 3