Integrate direct WebSocket-based leaderboard functionality for real-time updates and requests. Refactor related client-side logic to utilize this new connection.

cmd/client/lobby_native.go

@@ -0,0 +1,9 @@
+//go:build !wasm
+// +build !wasm
+
+package main
+
+// sendLobbyUpdateToJS ist ein Stub für native Builds (kein HTML-Interface)
+func (g *Game) sendLobbyUpdateToJS() {
+	// Native hat kein HTML-Overlay, nichts zu tun
+}