feat(web): unify console + docs on @unom/ui; host OpenAPI via Scalar

Move the management console (web/) off shadcn/ui to the shared @unom/ui
design system the marketing site + docs are built on, on the punktfunk
violet brand over dark chrome:

- Add @unom/ui/@unom/style/motion/radix-ui/zod + Geist; web/.npmrc maps the
  @unom scope (packages are public-read, so CI needs no npm auth).
- styles.css: one dark-violet palette (#141019/#1c1530, brand #6c5bf3 ->
  #a79ff8) exposed under BOTH the shadcn token names the routes use and
  @unom/ui's contract, so routes + components both resolve; pulls in
  @unom/ui's material gloss + easings.
- components/ui/* now back onto @unom/ui (AnimatedButton/InputText/Label/
  AnimatedCard); brand-mark/wordmark/logo replace the generic Radio icon in
  the shell + login.
- MaterialProvider (specular gloss) at the root. No UI sounds, like the site.

docs-site: new /api route renders the host management REST API as an
interactive Scalar reference (reads public/openapi.json, a snapshot of
docs/api/openapi.json), branded violet and linked from the top nav, the
docs sidebar, the landing page, and host-cli.md.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web/src/components/ui/label.tsx

@@ -1,18 +1,2 @@
-import * as React from 'react'
-import { cn } from '@/lib/utils'
-
-const Label = React.forwardRef<HTMLLabelElement, React.LabelHTMLAttributes<HTMLLabelElement>>(
-  ({ className, ...props }, ref) => (
-    <label
-      ref={ref}
-      className={cn(
-        'text-sm font-medium leading-none peer-disabled:cursor-not-allowed peer-disabled:opacity-70',
-        className,
-      )}
-      {...props}
-    />
-  ),
-)
-Label.displayName = 'Label'
-
-export { Label }
+// The console's Label IS @unom/ui's form label (radix-backed, text-main).
+export { Label } from '@unom/ui/form/label'