Add design-sync inputs for claude.ai/design

Import this repo's components into a Claude Design project so the design
agent builds with the real Cloudrite library instead of generic components.

The repo is a Next.js app, not a component library: no dist/, no exports
map, no .d.ts tree, and Tailwind exists only as build directives. So
.design-sync/ carries a small build that manufactures a consumable package
from source (staged to the gitignored .ds-pkg/):

- tsconfig.dts.json  declaration emit, for real <Name>Props contracts
- build-css.mjs      Tailwind v4 -> a static stylesheet via @tailwindcss/postcss
- make-pkg.mjs       stages the package; index.js exports all 292 symbols
                     while index.d.ts exports only the 61 roots, so shadcn's
                     flat compound parts don't each become a preview card.
                     Also generates the per-root parts tables in docs/
- shims/next-link    router-free anchor; the real next/link needs
                     AppRouterContext and drags in the App Router runtime
- fonts/             Space Grotesk + Inter woff2 (SIL OFL). next/font supplies
                     these at runtime in the app, so the bundle has none

previews/ holds 40 authored preview stories, conventions.md is prepended to
the generated README as the design agent's usage guide, and NOTES.md records
the gotchas a future sync would otherwise rediscover.

Co-Authored-By: Claude Opus 5 <[email protected]>

.design-sync/previews/Field.tsx

@@ -0,0 +1,78 @@
+import type { ReactNode } from 'react';
+import {
+  Checkbox,
+  Field,
+  FieldContent,
+  FieldDescription,
+  FieldError,
+  FieldGroup,
+  FieldLabel,
+  FieldLegend,
+  FieldSeparator,
+  FieldSet,
+  Input,
+} from 'cloudrite';
+
+// Cloudrite is dark-only — foreground-coloured text and `border-border` are
+// invisible on the preview harness's white card body. Stories render on the
+// brand surface, which is also how a real screen is built.
+const Surface = ({ children }: { children: ReactNode }) => (
+  <div className="bg-background text-foreground rounded-lg p-6">{children}</div>
+);
+
+export const Vertical = () => (
+  <Surface>
+    <FieldGroup className="w-80">
+      <Field>
+        <FieldLabel htmlFor="domain">Domain</FieldLabel>
+        <Input id="domain" defaultValue="cloudrite.co.nz" />
+        <FieldDescription>We'll point the DNS for you at no charge.</FieldDescription>
+      </Field>
+    </FieldGroup>
+  </Surface>
+);
+
+export const Horizontal = () => (
+  <Surface>
+    <FieldGroup className="w-96">
+      <Field orientation="horizontal">
+        <Checkbox id="tos" defaultChecked />
+        <FieldContent>
+          <FieldLabel htmlFor="tos">Managed backups</FieldLabel>
+          <FieldDescription>Nightly snapshots kept for 30 days.</FieldDescription>
+        </FieldContent>
+      </Field>
+    </FieldGroup>
+  </Surface>
+);
+
+export const WithError = () => (
+  <Surface>
+    <FieldGroup className="w-80">
+      <Field data-invalid>
+        <FieldLabel htmlFor="email">Email</FieldLabel>
+        <Input id="email" defaultValue="not-an-email" aria-invalid />
+        <FieldError>Enter a valid email address.</FieldError>
+      </Field>
+    </FieldGroup>
+  </Surface>
+);
+
+export const Fieldset = () => (
+  <Surface>
+    <FieldSet className="w-96">
+      <FieldLegend>Hosting</FieldLegend>
+      <FieldGroup>
+        <Field>
+          <FieldLabel htmlFor="plan-name">Plan name</FieldLabel>
+          <Input id="plan-name" defaultValue="Business" />
+        </Field>
+        <FieldSeparator />
+        <Field>
+          <FieldLabel htmlFor="sites">Site limit</FieldLabel>
+          <Input id="sites" type="number" defaultValue={10} />
+        </Field>
+      </FieldGroup>
+    </FieldSet>
+  </Surface>
+);