fix: wire movement controller before state machine; harden machine lookup

debug/test_level_builder.gd

@@ -65,6 +65,11 @@ func _build_player() -> void:
 	shape.shape.height = 1.8
 	player.add_child(shape)
 
+	# Movement controller MUST be attached first, before machine/children
+	var mover_script = load("res://movement/player_movement_controller.gd")
+	if mover_script:
+		player.set_script(mover_script)
+
 	# State machine
 	var sm := Node.new()
 	sm.name = "MovementStateMachine"
@@ -91,14 +96,6 @@ func _build_player() -> void:
 		if st_script:
 			st.set_script(st_script)
 
-	# Movement controller
-	var mover_script = load("res://movement/player_movement_controller.gd")
-	if mover_script:
-		player.set_script(mover_script)
-		# set_script does not auto-call _ready(); do it manually
-		if player.has_method("_ready"):
-			player._ready()
-
 	# Camera
 	var camera := Camera3D.new()
 	camera.name = "Camera3D"