Add cache-busting for JS/WASM assets, WASM readiness signaling to JS, and robust fetch with cache control. Improve lobby updates and refine WebSocket logic.

cmd/client/connection_wasm.go

@@ -81,8 +81,15 @@ func (g *Game) connectToServer() {
 				}
 
 				g.stateMutex.Lock()
+				oldPlayerCount := len(g.gameState.Players)
 				g.gameState = state
+				newPlayerCount := len(g.gameState.Players)
 				g.stateMutex.Unlock()
+
+				// Lobby-UI aktualisieren wenn sich Spieleranzahl geändert hat
+				if oldPlayerCount != newPlayerCount {
+					g.sendLobbyUpdateToJS()
+				}
 			}
 
 		case "leaderboard_response":
@@ -192,7 +199,8 @@ func (g *Game) sendInput(input game.ClientInput) {
 
 // startGame sendet den Start-Befehl über WebSocket
 func (g *Game) startGame() {
-	myID := g.getMyPlayerID()
+	// PlayerID ist der playerName (Server verwendet req.Name als PlayerID)
+	myID := g.playerName
 	msg := WebSocketMessage{
 		Type: "start",
 		Payload: game.StartRequest{