* feat(ui): add shared seeded paper gradients
Centralize the Paper mesh and grain wrappers so React and Solid apps can reuse the same deterministic seed-based visuals without repeating shader config. Add a standalone demo surface and update existing consumers so the shared package is easier to validate and evolve.
* fix(ui): resolve shared package from source
Point the shared UI package exports at source files so Next builds do not depend on a prebuilt dist directory. Add Next transpilation for @openwork/ui in Landing and Den Web so monorepo and Vercel builds resolve the package consistently.
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Co-authored-by: src-opn <src-opn@users.noreply.github.com>
