feat(ui): add /cv route, site-wide lowercase, no-cookies footer

reproduces the legacy cv (previously at grenade.github.io/cv) as a
react-router /cv route, fetched at runtime from the same gist. moves
the lowercase aesthetic from per-element overrides to a single body-
level rule so a future toggle can flip it from one place. adds a small
site-wide footer noting why no cookie consent banner is shown.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

ui/src/main.tsx

@@ -1,5 +1,6 @@
 import { StrictMode } from 'react';
 import { createRoot } from 'react-dom/client';
+import { BrowserRouter } from 'react-router-dom';
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
 import App from './App';
 
@@ -15,7 +16,9 @@ const queryClient = new QueryClient({
 createRoot(document.getElementById('root')!).render(
   <StrictMode>
     <QueryClientProvider client={queryClient}>
-      <App />
+      <BrowserRouter>
+        <App />
+      </BrowserRouter>
     </QueryClientProvider>
   </StrictMode>,
 );