✨ feat: ui commit hash versioning

apps/web/components/footer.tsx

@@ -0,0 +1,20 @@
+"use client";
+
+import { useEffect, useState } from "react";
+
+export function Footer() {
+  const [hash, setHash] = useState<string>("...");
+
+  useEffect(() => {
+    fetch("/api/commit-hash")
+      .then((res) => res.json())
+      .then((data) => setHash(data.hash))
+      .catch(() => setHash("unknown"));
+  }, []);
+
+  return (
+    <footer className="fixed bottom-2 right-4 py-1 pointer-events-none">
+      <span className="text-xs text-gray-400 font-mono">{hash}</span>
+    </footer>
+  );
+}