feat: add tutorial section

scripts/managers/playerboard_manager.gd

@@ -123,14 +123,18 @@ func grab_item(grid_position: Vector2i) -> bool:
 	if multiplayer.is_server():
 		# HOST/SERVER: Broadcast to all clients
 		main.rpc("sync_grid_item", cell.x, cell.y, cell.z, -1)
-		# Use main's RPC which properly looks up player by ID on each client
 		var peer_id = player.name.to_int()
 		main.rpc("sync_playerboard", peer_id, player.playerboard)
 		player.has_performed_action = true
 		player.consume_action_points(1)
 		player.rpc("force_action_state_none")
 	else:
-		# CLIENT: Send RPC request to server for validation
+		# CLIENT: Optimistic Local Update for lag compensation
+		player.has_performed_action = true
+		player.consume_action_points(1)
+		player.force_action_state_none()
+		
+		# Send RPC request to server for validation
 		player.rpc_id(1, "request_server_grab", grid_position, cell.x, cell.y, cell.z, item)
 	
 	return true # Action applied locally
@@ -277,6 +281,10 @@ func _force_sync_to_client(cell: Vector3i, server_item: int):
 	# Sync their Playerboard (which they thought they updated)
 	main.rpc_id(peer_id, "sync_playerboard", peer_id, player.playerboard)
 	
+	# Restore Action Points locally for the client (sync action points back)
+	# player is the caller peer since this is the server instance of the player's manager
+	player.rpc_id(peer_id, "sync_action_points", player.action_points)
+	
 	print("Server: Forced sync to client %d due to action failure." % peer_id)
 
 func bot_try_grab_item() -> bool: