feat: ui-builder plugin

[olliethedev]

Changes in this PR:

• UI-Builder plugin

closes: #41

---

Note

Adds a production-ready UI Builder plugin that enables visual drag-and-drop page creation, storage via CMS content type, and public rendering.

• Backend: new UI_BUILDER_CONTENT_TYPE and schemas; package version bump to @btst/stack@1.10.0
• Client: uiBuilderClientPlugin with admin routes (/ui-builder, /ui-builder/new, /ui-builder/:id/edit), SSR loader hooks, PageRenderer/SuspensePageRenderer, default/custom component registry, and React Query hooks (list, get by id/slug, create/update/delete)
• UI lib: adds editor/registry components and minimal TipTap tooling; updates exports/dependencies to support the builder
• Build/config: includes ui-builder entries in build, package exports for api/client/components/hooks/css; Tailwind v4 CSS @import and @source to safelist dynamic classes
• Docs: new docs/plugins/ui-builder.mdx and Plugins index update with "UI Builder" card
• Examples: Next.js, React Router, TanStack integrations (provider overrides, CSS imports, preview route)
• E2E: Playwright tests for admin flows (list/create/edit/delete) and public rendering; config updated to run *.ui-builder.spec.ts
• CI: increase Node memory for e2e and set Playwright HTML reporter to never open

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Project	Deployment	Review	Updated (UTC)
better-stack-docs	Ready	Preview, Comment	Jan 15, 2026 10:12pm

[olliethedev]

cursor review

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