gh-983: fix some tying ignore comments

[paddyroddy]

Description

Tidying up ty: ignore comments where possible. Have also been more consistent of when we do and don't use from typing import syntax.

Closes: #983, #1071

Checks

• Is your code passing linting?
• Is your code passing tests?
• Have you added additional tests (if required)?
• Have you modified/extended the documentation (if required)?
• Have you added a one-liner changelog entry above (if required)?

[Copilot]

Pull request overview

This PR reduces ty suppression usage by replacing several # ty: ignore[...] comments with explicit typing.cast(...) calls, and standardizes type-checking imports by using import typing + typing.TYPE_CHECKING across modules and tests.

Changes:

• Replaced many from typing import TYPE_CHECKING imports with import typing and updated guards to if typing.TYPE_CHECKING:.
• Converted several # ty: ignore[invalid-*-type] suppressions into typing.cast(...) at return/yield sites.
• Updated tests/core/test_lensing.py to avoid a no-matching-overload ignore by calling from_convergence with explicit boolean flags.

Reviewed changes

Copilot reviewed 47 out of 47 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tests/fixtures/helper_classes.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/fixtures/generators.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/fixtures/domain.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/fixtures/array_backends.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/core/test_user.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/core/test_shells.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/core/test_shapes.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/core/test_points.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/core/test_observations.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/core/test_lensing.py	Switch to import typing guard; remove overload-ignore by passing explicit flags to from_convergence.
tests/core/test_healpix.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/core/test_harmonics.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/core/test_galaxies.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/core/test_fields.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/core/test_arraytools.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/core/test_algorithm.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/core/grf/test_transformations.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/core/grf/test_solver.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/core/grf/test_core.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/benchmarks/test_shells.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/benchmarks/test_shapes.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/benchmarks/test_points.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/benchmarks/test_lensing.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/benchmarks/test_harmonics.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/benchmarks/test_galaxies.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/benchmarks/test_fields.py	Switch to import typing and typing.TYPE_CHECKING guard.
tests/benchmarks/test_arraytools.py	Switch to import typing and typing.TYPE_CHECKING guard.
glass/user.py	Switch to import typing and typing.TYPE_CHECKING guard.
glass/shells.py	Switch to import typing / guard; replace invalid-return ignore with typing.cast on restrict() return values.
glass/shapes.py	Switch to import typing / guard; replace invalid-return ignores with typing.cast for ComplexArray returns.
glass/points.py	Switch to import typing / guard while keeping Any import; update TYPE_CHECKING usage.
glass/observations.py	Switch to import typing and typing.TYPE_CHECKING guard.
glass/lensing.py	Switch to import typing / guard; use @typing.overload; replace invalid-return ignore with typing.cast in multi_plane_matrix.
glass/jax.py	Switch to import typing and typing.TYPE_CHECKING guard.
glass/healpix.py	Switch to import typing and typing.TYPE_CHECKING guard.
glass/harmonics.py	Switch to import typing and typing.TYPE_CHECKING guard.
glass/grf/_transformations.py	Switch to import typing and typing.TYPE_CHECKING guard.
glass/grf/_solver.py	Switch to import typing and typing.TYPE_CHECKING guard.
glass/grf/_core.py	Switch to import typing / guard; replace Protocol import usage with typing.Protocol.
glass/galaxies.py	Switch to import typing and typing.TYPE_CHECKING guard.
glass/fields.py	Switch to import typing / guard; replace invalid-yield/return ignores with typing.cast; update nested TYPE_CHECKING usage.
glass/cosmology.py	Replace Protocol import usage with typing.Protocol.
glass/arraytools.py	Switch to import typing / guard; replace invalid-assignment ignore with typing.cast around xpx.union1d.
glass/algorithm.py	Switch to import typing and typing.TYPE_CHECKING guard.
glass/_types.py	Switch to import typing / guard; use typing.ParamSpec / typing.TypeVar in TYPE_CHECKING block.
glass/_rng.py	Switch to import typing and typing.TYPE_CHECKING guard.
glass/_array_api_utils.py	Switch to import typing / guard; move Any import under TYPE_CHECKING.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.