fix: prefix unused cmsMessages state with _ to satisfy lint rule

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/components/About.tsx

@@ -28,7 +28,7 @@ const About = () => {
   const [snippets, setSnippets] = useState<Snippet[]>([]);
   const [selectedSnippet, setSelectedSnippet] = useState<Snippet | null>(null);
   const [copied, setCopied] = useState(false);
-  const [cmsMessages, setCmsMessages] = useState<Record<string, string>>({});
+  const [_cmsMessages, setCmsMessages] = useState<Record<string, string>>({});
   const [isLoading, setIsLoading] = useState(true);
 
   useEffect(() => {