JacobiRobot import crashes with NumPy 2.x because matplotlib is imported eagerly

[MNikoliCC]

Summary

The Webots bridge imports teleop.utils.jacobi_robot.JacobiRobot. That module imports matplotlib.pyplot at module import time, even though the Webots path does not use plotting.

On the current machine, user-site NumPy was upgraded to 2.5.0 while system Matplotlib was compiled against NumPy 1.x. The eager Matplotlib import caused the bridge to crash before any robot logic started.

Observed error

A module that was compiled using NumPy 1.x cannot be run in NumPy 2.5.0
ImportError: numpy.core.multiarray failed to import

Stack:

File ".../webots/controllers/ur3e_teleop_bridge/ur3e_teleop_bridge.py", line 17, in <module>
  from teleop.utils.jacobi_robot import JacobiRobot
File ".../teleop/teleop/utils/jacobi_robot.py", line 3, in <module>
  import matplotlib.pyplot as plt

Expected behavior

Importing JacobiRobot for non-visual servoing should not import Matplotlib.

Acceptance criteria

• Move matplotlib.pyplot import into the visualization methods that actually use it.
• from teleop.utils.jacobi_robot import JacobiRobot works without Matplotlib being importable.
• The Webots bridge starts without requiring a NumPy downgrade solely because of Matplotlib.
• Add or update a lightweight import test in teleop if practical.

Temporary workaround

Downgrading user-site NumPy to <2 unblocked the local run:

python3 -m pip install --user --break-system-packages "numpy<2"