/// <summary>
/// Drives how the ghost object moves and orients each frame.
/// </summary>
public interface IGhostMovementStrategy
{
    /// <summary>
    /// Called every frame when there is an active ghost.
    /// Responsible for updating GhostTransform.position and .rotation.
    /// Must also write ctx.RotationAxis before returning.
    /// </summary>
    void UpdateMovement(ref GhostMovementContext ctx);
}