feat: add site_admin role, casual match support, and tournament deletion

src/app/admin/tournaments/[id]/page.tsx

@@ -2,8 +2,9 @@ import { prisma } from "@/lib/prisma"
 import Navigation from "@/components/Navigation"
 import Link from "next/link"
 import { notFound, redirect } from "next/navigation"
-import { canManageTournament, hasRole } from "@/lib/permissions"
+import { canManageTournament, canDeleteTournament } from "@/lib/permissions"
 import { getTournamentStatus } from "@/lib/tournamentUtils"
+import { DeleteTournamentButton } from "@/components/DeleteTournamentButton"
 
 interface PageProps {
   params: {
@@ -20,8 +21,8 @@ export default async function TournamentDetailPage({ params }: PageProps) {
     redirect("/auth/login")
   }
 
-  // Check if user can create tournaments (tournament_admin or club_admin)
-  const canCreate = await hasRole('tournament_admin')
+  // Check if user can delete this tournament
+  const deletePermission = await canDeleteTournament(tournamentId)
 
   let tournament = await prisma.event.findUnique({
     where: { id: tournamentId },
@@ -119,6 +120,8 @@ export default async function TournamentDetailPage({ params }: PageProps) {
     orderBy: { playedAt: "desc" },
   })
 
+  const matchCount = matches.length
+
   return (
     <div className="min-h-screen bg-gray-50">
       <Navigation />
@@ -173,6 +176,13 @@ export default async function TournamentDetailPage({ params }: PageProps) {
                     >
                       Export CSV
                     </a>
+                    {deletePermission.allowed && (
+                      <DeleteTournamentButton
+                        tournamentId={tournament.id}
+                        tournamentName={tournament.name}
+                        matchCount={matchCount}
+                      />
+                    )}
                   </>
                 )}
               </div>