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/Collapsible.tsx

@@ -0,0 +1,50 @@
+import type { ReactNode } from 'react';
+import { Button, Collapsible, CollapsibleContent, CollapsibleTrigger } from 'cloudrite';
+import { ChevronsUpDown } from 'lucide-react';
+
+// 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 Open = () => (
+  <Surface>
+    <Collapsible defaultOpen className="w-80">
+      <div className="flex items-center justify-between gap-4">
+        <span className="text-sm font-medium">What's included</span>
+        <CollapsibleTrigger asChild>
+          <Button variant="ghost" size="icon" aria-label="Toggle">
+            <ChevronsUpDown />
+          </Button>
+        </CollapsibleTrigger>
+      </div>
+      <CollapsibleContent className="mt-2 flex flex-col gap-2">
+        {['Nightly backups', 'Managed SSL', 'Uptime monitoring'].map((item) => (
+          <div key={item} className="rounded-md border border-border px-3 py-2 text-sm">
+            {item}
+          </div>
+        ))}
+      </CollapsibleContent>
+    </Collapsible>
+  </Surface>
+);
+
+export const Closed = () => (
+  <Surface>
+    <Collapsible className="w-80">
+      <div className="flex items-center justify-between gap-4">
+        <span className="text-sm font-medium">What's included</span>
+        <CollapsibleTrigger asChild>
+          <Button variant="ghost" size="icon" aria-label="Toggle">
+            <ChevronsUpDown />
+          </Button>
+        </CollapsibleTrigger>
+      </div>
+      <CollapsibleContent className="mt-2 text-sm text-muted-foreground">
+        Hidden until opened.
+      </CollapsibleContent>
+    </Collapsible>
+  </Surface>
+);