Improve MineGeo UI and application flows

app/leaderboard/page.tsx

@@ -79,6 +79,13 @@ export default async function LeaderboardPage({
         </div>
         {data ? (
           <>
+            {difficulty === "all" && (
+              <p className="tournament-champion-note">
+                {t(
+                  "The latest tournament champion holds first place on the global leaderboard for seven days. Solo scores remain unchanged.",
+                )}
+              </p>
+            )}
             {data.leaders.length > 0 && !search && data.page === 1 && (
               <WinnersPodium leaders={data.leaders} />
             )}