Mark competitive leaderboard as discontinued

src/react_app/src/components/competition/CompetitionApp.jsx

@@ -217,6 +217,15 @@ const CompetitionRoutes = () => {
 
 const CompetitionApp = () => (
   <Router>
+    <aside
+      aria-label="Leaderboard discontinued"
+      className="border-b border-amber-300/30 bg-amber-100 px-4 py-3 text-center text-sm leading-relaxed text-amber-950 sm:px-6"
+    >
+      <strong className="font-semibold">
+        This leaderboard has been discontinued.
+      </strong>{" "}
+      Rankings are no longer being updated.
+    </aside>
     <CompetitionRoutes />
   </Router>
 );

src/react_app/src/components/competition/CompetitionFaq.jsx

@@ -159,12 +159,11 @@ const CompetitionFaq = ({ percentiles }) => {
       ),
     },
     {
-      question: "When does the leaderboard refresh?",
+      question: "Is the leaderboard still being updated?",
       answer: (
         <p>
-          Rankings are recomputed daily from finalized sendou.ink data at 00:30 UTC
-          (7:30&nbsp;PM Eastern during standard time, 8:30&nbsp;PM Eastern during daylight time).
-          Your entry updates the next time you play a new eligible tournament.
+          No. The competitive leaderboard has been discontinued. The standings
+          shown are historical, and new tournament results are no longer imported.
         </p>
       ),
     },

src/react_app/src/components/competition/CompetitionLayout.jsx

@@ -184,7 +184,7 @@ const CompetitionLayout = ({
             Competitive Rankings
           </h1>
           <p className="mt-2 max-w-3xl text-slate-300">
-            Refreshed once daily at 00:30 UTC. Standings only move when new tournaments are recorded.
+            Historical standings from the last published leaderboard update.
           </p>
         </div>
       </header>
@@ -216,7 +216,7 @@ const CompetitionLayout = ({
               )}
               {stale && (
                 <span className="inline-flex items-center rounded-full bg-amber-500/15 px-3 py-1 text-xs font-medium text-amber-300 ring-1 ring-amber-300/20">
-                  Stale — queued for refresh
+                  Archived snapshot
                 </span>
               )}
             </div>

src/react_app/src/components/competition/StableLeaderboardHeader.jsx

@@ -4,7 +4,7 @@ const StableLeaderboardHeader = () => (
   <header className="mb-4">
     <h2 className="text-2xl font-semibold text-slate-100">Competitive rankings</h2>
     <p className="mt-1 text-sm text-slate-400">
-      Auto refresh at 00:30 UTC. Players stay listed so long as they log a ranked event at least every 120 days.
+      Archived rankings from the last published update. No new tournament results will be added.
     </p>
   </header>
 );