feat(components): migrate to unified radix-ui package + shadcn v4 RTL classes#1059

hotlong merged 2 commits intomainobjectstack-ai/objectui:mainfrom

copilot/evaluate-shadcn-v4-upgrade-impactobjectstack-ai/objectui:copilot/evaluate-shadcn-v4-upgrade-impactCopy head branch name to clipboard