feat: Age gate

app/hooks/use-age-confirmation.tsx

@@ -0,0 +1,25 @@
+import { useEffect, useState } from 'react';
+
+import Cookies from 'js-cookie';
+
+const COOKIE_NAME = 'age_confirm';
+
+export const useAgeConfirmation = () => {
+  const [ageConfirmed, setAgeConfirmed] = useState(true);
+
+  useEffect(() => {
+    if (!Cookies.get(COOKIE_NAME)) {
+      setAgeConfirmed(false);
+    }
+  }, []);
+
+  const confirmAge = () => {
+    setAgeConfirmed(true);
+    Cookies.set(COOKIE_NAME, 'confirmed', { expires: 365 });
+  };
+
+  return {
+    ageConfirmed,
+    onAgeConfirmed: confirmAge
+  };
+};