Read the official standings and results from the CSI portal.

The Campionato page showed hardcoded demo data. It now reads the real
2025/26 season (Campionato Open Misto Eccellenza, project 767, team
3359, Girone B) from the Livescore CSI Bologna portal.

The portal has no documented API: we call the same endpoints its own
pages call over ajax, so parsing must degrade gracefully. A single
server route fetches them, caches for 6 hours and serves the last good
payload on failure; the page falls back to the previous data when
nothing is available. No browser ever contacts the portal, keeping the
request count independent of how many players open the app.

Also fixes the header, which claimed "Girone C - CSI Milano".

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/lib/csi.ts

@@ -0,0 +1,21 @@
+import { useQuery } from "@tanstack/react-query";
+import type { DatiCsi } from "./csi-core";
+
+export const CSI_KEY = ["csi"] as const;
+
+/**
+ * Classifica e risultati ufficiali CSI. Il server tiene una cache di 6 ore:
+ * qui basta una lettura per sessione.
+ */
+export function useCsi() {
+  return useQuery<DatiCsi>({
+    queryKey: CSI_KEY,
+    queryFn: async () => {
+      const res = await fetch("/api/public/csi");
+      if (!res.ok) throw new Error("CSI non disponibile");
+      return res.json();
+    },
+    staleTime: 6 * 60 * 60_000,
+    retry: 1,
+  });
+}