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/package.json

@@ -18,6 +18,7 @@
     "react-bootstrap-icons": "^1.11.4",
     "react-dom": "^19.0.0",
     "react-markdown": "^9.0.1",
+    "react-router-dom": "^7.14.2",
     "react-vertical-timeline-component": "^3.6.0"
   },
   "devDependencies": {