fix(linalg): Fix numpy annotations on Python<3.14

.github/workflows/checks.yml

@@ -36,6 +36,10 @@ jobs:
           - dtype: float64
           # Installation options variations
           - options: 'none'
+          # No options on Python < 3.14, where annotations are evaluated eagerly, to catch
+          # annotations referencing optional dependencies.
+          - python-version: '3.10'
+            options: 'none'
           # Lower-bounds of all dependencies and Python version.
           - python-version: '3.10.0'
             extra_groups: 'lower_bounds'

CHANGELOG.md

@@ -8,6 +8,11 @@ changelog does not include internal changes that do not affect the user.
 
 ## [Unreleased]
 
+### Fixed
+
+- Fixed a bug with type annotations making it impossible to use TorchJD without any optional
+  dependencies on Python versions older than 3.14.
+
 ## [0.17.0] - 2026-06-24
 
 ### Added

src/torchjd/_linalg/_dual_cone.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import contextlib
 from abc import ABC, abstractmethod