Migrate ArtifactsSection to queryOptions + useQuery composition and derive\nfile tree/hasFiles locally from flat data. Remove the now-unused\nuseSandboxFilesTree helper and update related tests to mock the new\nqueryOptions-based flow.
Migrate all Remixicon component imports in workflow/skill to Tailwind CSS
icon utility classes (i-ri-*), reducing JS bundle size. Update MenuItem
to accept string icon classes alongside React components. Adjust test
selectors that relied on SVG element queries.
