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/App.css

@@ -1,6 +1,7 @@
 body {
   background-color: #2c3e50;
   color: #ecf0f1;
+  text-transform: lowercase;
 }
 
 .container {
@@ -36,3 +37,11 @@ a.hot-pink {
 .vertical-timeline-element-content a {
   color: #1565c0;
 }
+
+.site-footer {
+  margin-top: 3rem;
+  padding: 1rem 0;
+  font-size: 0.75rem;
+  opacity: 0.6;
+  text-align: center;
+}