V5 radius

Editor assessment

The subject `feat: v5 radius` compresses a theme milestone — introducing the radius token scale for the v5 design — into three words that only make sense with project context. The feat type fits new design-token work. The body adds a `fix test` bullet and nothing else, so neither the token set nor the motivation appears. No scope or footer is present. Hygiene is minimal rather than wrong. Insiders will decode it; a general showcase audience learns almost nothing about what actually shipped.