Fix gauntlet_manager indentation and scope

scripts/managers/gauntlet_manager.gd

@@ -503,6 +503,7 @@ func _spawn_mission_tiles() -> void:
 	# Goal items: Heart(7), Diamond(8), Star(9), Coin(10)
 	var goal_items = [7, 8, 9, 10]
 	var tiles_spawned: int = 0
+	var main = get_node_or_null("/root/Main")
 	
 	for x in range(ARENA_COLUMNS):
 		for z in range(ARENA_ROWS):
@@ -535,7 +536,6 @@ func _spawn_mission_tiles() -> void:
 			tiles_spawned += 1
 			
 			# Sync to clients
-			var main = get_node("/root/Main")
 			if main:
 				main.rpc("sync_grid_item", x, 1, z, tile_type)