feat(web): Storybook for offline UI design + light theme + brand spinner

Stand up Storybook so the management console can be designed without a running
host, plus the design-system work that surfaced along the way.

Storybook (@storybook/react-vite):
- Slim Start/Nitro-free vite config; the preview imports the app's real
  src/styles.css directly so the design tokens stay single-sourced (no mirror).
- Stories for the @unom/ui primitives (Button/Card/Inputs/Badge), brand marks,
  the AppShell (throwaway in-memory TanStack router), and every data-driven page
  (Dashboard/Host/Clients/Library/Settings) rendered offline via a window.fetch
  stub + typed fixtures. The route page components are exported so stories can
  render them.

Light theme:
- styles.css now carries a light :root (lavender, from the docs palette) with the
  existing violet chrome moved to .dark; the live console still pins html.dark by
  default, so this only adds the option (Storybook's toolbar toggles it).
- Fixes a stray `*/` inside a comment that prematurely closed it and silently
  broke Tailwind's @theme processing.

Spinner:
- The punktfunk lens recreated with motion/react: two circles surge through one
  another in depth (JS perspective scale + z-index — robust where mix-blend-mode
  flattens CSS preserve-3d) with a screen-blend lens highlight. Replaces the
  skeleton loading state in QueryState; removes ui/skeleton.tsx.

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

web/src/stories/Card.stories.tsx

@@ -0,0 +1,45 @@
+import type { Meta, StoryObj } from '@storybook/react-vite'
+import {
+  Card,
+  CardContent,
+  CardDescription,
+  CardFooter,
+  CardHeader,
+  CardTitle,
+} from '@/components/ui/card'
+import { Button } from '@/components/ui/button'
+import { Badge } from '@/components/ui/badge'
+
+const meta = {
+  title: 'UI/Card',
+  component: Card,
+  // Card requires `children`; every story supplies its own via `render`, so this
+  // is just a placeholder to satisfy the arg type.
+  args: { children: null },
+} satisfies Meta<typeof Card>
+
+export default meta
+type Story = StoryObj<typeof meta>
+
+export const HostCard: Story = {
+  render: () => (
+    <Card className="max-w-sm">
+      <CardHeader>
+        <div className="flex items-center justify-between">
+          <CardTitle>ENRICOS-DESKTOP</CardTitle>
+          <Badge variant="success">online</Badge>
+        </div>
+        <CardDescription>RTX 5070 Ti · NVENC · 5120×1440 @ 240</CardDescription>
+      </CardHeader>
+      <CardContent className="text-sm text-muted-foreground">
+        Paired 2 days ago. Last session 11 ms p50 capture→present.
+      </CardContent>
+      <CardFooter className="gap-2">
+        <Button size="sm">Connect</Button>
+        <Button size="sm" variant="outline">
+          Details
+        </Button>
+      </CardFooter>
+    </Card>
+  ),
+}