do to formatters

apps/website/lib/formatters/LeagueFormatter.ts

@@ -0,0 +1,15 @@
+/**
+ * LeagueDisplay
+ * 
+ * Deterministic display logic for leagues.
+ */
+
+export class LeagueFormatter {
+  /**
+   * Formats a league count with pluralization.
+   * Example: 1 -> "1 league", 2 -> "2 leagues"
+   */
+  static formatCount(count: number): string {
+    return `${count} ${count === 1 ? 'league' : 'leagues'}`;
+  }
+}