[ssj9685]

Summary

• add the private @ga-ut/ui package on top of CE with GA-UT tokens, foundations, and seven reusable Web Components
• add a polished responsive component showcase with light/dark themes, interactive states, task patterns, inspector, and copy feedback
• publish the showcase through the existing GitHub Pages workflow at /ui/
• integrate UI type-checking, builds, packaging checks, and component tests into the workspace

Design direction

• GA-UT porcelain, ink, coral, celadon, forest, and focus-blue palette
• editorial display typography paired with a modern system sans stack
• semantic variants and native Web Component primitives without Tailwind or runtime UI dependencies
• responsive desktop and mobile layouts with accessible native controls and ARIA state

Validation

• bun run verify:full
  • TypeScript checks passed
  • Vitest: 34 passed
  • event/runtime tests: 11 passed
  • CE, UI, playground, and showcase builds passed
  • docs validation passed
  • CE and UI package dry-run checks passed
• visual QA: 1536×1024 desktop and 390×844 mobile
• interaction QA: theme, mobile menu, task completion/addition, token copy toast, form input, preview/code tabs, switch, and feedback dismissal
• mobile horizontal overflow: none

Deployment

After merge, the existing Pages workflow will publish the showcase at:

https://ga-ut.github.io/ce/ui/