feat: implement core lobby management system with Nakama integration, player state, and game settings.

scripts/nakama_manager.gd

@@ -51,8 +51,12 @@ func connect_to_nakama_async(email: String = "", password: String = "") -> bool:
 	# 1. Authenticate
 	if email == "":
 		var device_id = OS.get_unique_id()
-		# Use a more stable ID for testing instead of randi() every call
-		# If you need multiple clients on one machine, consider a command line arg or config
+		
+		# If running in editor or debug, append a unique suffix to allow multiple 
+		# instances on one machine to have separate sessions.
+		if OS.is_debug_build():
+			device_id += "_" + str(Time.get_ticks_msec()) + "_" + str(randi() % 1000)
+			
 		session = await client.authenticate_device_async(device_id)
 	else:
 		session = await client.authenticate_email_async(email, password)