chore: ruff & add Gustavo to authors

Author: HarrisonKramer

docs/authors.rst

@@ -32,6 +32,7 @@ We sincerely appreciate the contributions of the following individuals, whose ef
 - **Melquiades Xiong** (`GitHub <https://github.com/Xiong-Ziyi>`_)
 - **Scott Paine** (`GitHub <https://github.com/scottpaine>`_)
 - **Renato Ferracini Alves** (`GitHub <https://github.com/RFerraciniAlves>`_)
+- **Gustavo Vasconcelos** (`GitHub <https://github.com/gustavu92>`_)
 
 
 Your contributions, whether in the form of code, documentation, feedback, or discussions, are what make **Optiland** better for everyone.

optiland/phase/height_profile.py

@@ -1,13 +1,19 @@
 """
 Provides a phase profile based on a height map and dispersive material.
+
+Gustavo Vasconcelos, 2026
 """
 
 from __future__ import annotations
 
+from typing import TYPE_CHECKING
+
 from optiland import backend as be
-from optiland.materials.base import BaseMaterial
 from optiland.phase.base import BasePhaseProfile
 
+if TYPE_CHECKING:
+    from optiland.materials.base import BaseMaterial
+
 try:
     from scipy.interpolate import RectBivariateSpline
 except ImportError: