fix: calculate speed from player velocity instead of non-existent property

characters/skinned_player_model.gd

@@ -72,13 +72,17 @@ func _process(delta: float) -> void:
 	if not animation_player:
 		return
 	
-	# Poll the movement state machine for current state
+	# Get movement state from the state machine
 	var sm = get_parent().get_node_or_null("MovementStateMachine")
 	if not sm:
 		return
 	
 	var state = sm.current_state
-	var speed = sm.movement_speed
+	# Calculate speed from player's horizontal velocity
+	var speed = 0.0
+	if sm.player:
+		var vel = sm.player.velocity
+		speed = Vector2(vel.x, vel.z).length()
 	
 	match state:
 		"ground", "idle":