v0.13.0

Changes

• Screen Spec support — declare frontend screen contracts in OpenAPI (#1)
  • screen: true module config flag enables screen spec mode
  • x-screen-const, x-screen-id, x-screen-name, x-back-navigation, x-events extensions on OperationObject
  • Pre-parsed TemplateContext.screens (ScreenContext[]) eliminates deep Handlebars nesting
  • Screen-specific lint rules (consistency checks for x-screen-* fields)
  • init --screens scaffold (starter YAML, navigation/events templates, config)
  • Default screen-navigation.hbs and screen-events.hbs templates
  • LinkObject on ResponseObject for navigation targets
  • Screen Spec documentation