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/Host.stories.tsx

@@ -0,0 +1,20 @@
+import type { Meta, StoryObj } from '@storybook/react-vite'
+import { HostPage } from '@/routes/host'
+import { MockApi } from './lib/mock-api'
+import { compositors, hostInfo } from './lib/fixtures'
+
+const meta = {
+  title: 'Pages/Host',
+  component: HostPage,
+} satisfies Meta<typeof HostPage>
+
+export default meta
+type Story = StoryObj<typeof meta>
+
+export const Default: Story = {
+  render: () => (
+    <MockApi routes={{ '/api/v1/host': hostInfo, '/api/v1/compositors': compositors }}>
+      <HostPage />
+    </MockApi>
+  ),
+}