Add per-user detail pages with activity chart and request history

Each user in the leaderboard links to a profile page showing stat cards,
a line chart (requests / storage / watch hours, 1W–1Y timeframes, raw or
normalized, plus a Storage Load mode), and a full request history sorted
newest-first. Includes Overseerr media status codes (1–5), Tautulli watch
history aggregation, and a server-side raw cache so the user API route can
enrich requests without re-fetching everything.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/page.tsx

@@ -65,6 +65,13 @@ export default function Page() {
     load();
   }, [load]);
 
+  // Poll every 2 minutes to keep the UI fresh against the server cache.
+  // The server itself refreshes every 5 min via the background poller.
+  useEffect(() => {
+    const id = setInterval(() => load(), 2 * 60 * 1000);
+    return () => clearInterval(id);
+  }, [load]);
+
   const hasTautulli = data?.summary.totalWatchHours !== null;
   const openAlertCount = data?.summary.openAlertCount ?? 0;
   const generatedAt = data?.generatedAt ?? null;
@@ -152,7 +159,7 @@ export default function Page() {
                 <button
                   key={t}
                   onClick={() => setTab(t)}
-                  className={`px-4 py-2.5 text-sm font-medium border-b-2 transition-colors ${
+                  className={`px-4 py-2.5 text-sm font-medium border-b-2 transition-colors cursor-pointer ${
                     tab === t
                       ? "border-yellow-400 text-white"
                       : "border-transparent text-slate-500 hover:text-slate-300"