How to rotate NavMeshAgent toward its movement direction?

Question

I'm working on a 2D game in XY plane. I've created enemies using NavMeshAgent and I've gave my agents way pints to move between them. The problem is that I don't know how to rotate them in the direction they are moving or vector of the velocity (blue arrow). The front of the agent is in the direction of Y axis(green arrow). Note that updateRotation isn't an option, That will rotate agent and make it disappear(agent rotates 90 degree around X axis).

here's the a code that i have found on unity forum, it works perfectly on 3D, but i can't make it work on 2D

    void FaceTarget()
    {
        Vector3 direction = agent.steeringTarget;
        Quaternion lookRotation = Quaternion.LookRotation(new Vector3(direction.x, 0, direction.z));
        transform.rotation = Quaternion.Slerp(transform.rotation, lookRotation, Time.deltaTime * 5);
    }

I've tried this code, It calculates the angel between the vector of the velocity and local Y axis. Desired output is that agent rotates toward its movement direction. In the actual output, agent rotates, But in some points, It's not toward the movement direction. I know the problem is that angels range is [0,180], not [0,360], But I can't figure out any solution for it.

    void FaceTarget()
    {
        Vector3 lookTarget = agent.velocity.normalized;
        float angel = Vector3.Angle(lookTarget, Vector3.up);
        transform.rotation = Quaternion.Euler(0,0,angel);
    }

Answer 1

I've solved it with help of ChatGpt. Here's the code

void FaceTarget()
{
    if (agent.velocity != Vector3.zero)
    {
        Vector3 moveDirection = new Vector3(agent.velocity.x, agent.velocity.y, 0f);
        if (moveDirection != Vector3.zero)
        {
            float angel = Mathf.Atan2(moveDirection.x, moveDirection.y) * Mathf.Rad2Deg;
            transform.rotation = Quaternion.AngleAxis(angel, Vector3.back);
        }
    }

}

Here's another code provided by @DMGregory

void FaceTarget() {
    var vel = agent.velocity;
    vel.z = 0;

    if (vel != Vector3.zero)
    {
        transform.rotation = Quaternion.LookRotation(Vector3.forward, vel);
    }
}