Enhance cache management and UI: implement multi-team cache claiming, add admin waitlist functionality, and improve leaderboard display for better user experience

src/components/layout/Screen.js

@@ -48,6 +48,8 @@ const styles = StyleSheet.create({
   content: {
     flex: 1,
     padding: 15,
+    zIndex: 1,
+    overflow: "hidden",
   },
 });