add good looking lobby ui with websocket support with claude sonnet 3.7

src/app.d.ts

@@ -18,4 +18,35 @@ declare global {
 	}
 }
 
-export { };
+export interface Player {
+  id: number;
+  name: string;
+  isHost: boolean;
+}
+
+export interface GameMode {
+  id: string;
+  name: string;
+}
+
+export interface Playlist {
+  id: number;
+  name: string;
+  imageUrl: string;
+  songCount: number;
+}
+
+export interface GameSettings {
+  maxPlayers: number;
+  gameMode: string;
+  selectedPlaylist: number;
+}
+
+export type WebSocketMessage = {
+  type: string;
+  [key: string]: any;
+}
+
+export {
+
+};