Add map-specific tournament creation link

app/tournaments.css

@@ -2,6 +2,13 @@
   max-width: 1180px;
   min-height: 60vh;
 }
+.start-panel .tournament-map-action {
+  margin-top: 12px;
+  border-color: var(--green);
+  color: var(--green);
+  text-align: center;
+  text-decoration: none;
+}
 .tournament-page .eyebrow,
 .tournament-server-clock,
 .tournament-card p,

app/tournaments/page.tsx

@@ -2,13 +2,20 @@ import { Header, Footer } from "@/components/Shell";
 import { TournamentIndex } from "@/components/TournamentLobby";
 import { user } from "@/lib/supabase";
 
-export default async function TournamentsPage() {
+export default async function TournamentsPage({
+  searchParams,
+}: {
+  searchParams: Promise<{ map?: string | string[] }>;
+}) {
   const account = await user();
+  const { map } = await searchParams;
+  const initialMapId =
+    typeof map === "string" && /^[0-9a-f-]{36}$/i.test(map) ? map : null;
   return (
     <>
       <Header />
       <main id="main-content">
-        <TournamentIndex signedIn={!!account} />
+        <TournamentIndex signedIn={!!account} initialMapId={initialMapId} />
       </main>
       <Footer />
     </>