5b14af8ea1
Mechanical cleanup via `ruff check --fix` + `ruff format`: - cli.py, test_auth.py: import sorting (isort convention) - cli.py: remove unused AuthenticationError import in _run_setup - config.py: remove unused `field` import - test_auth.py: remove unused MagicMock import - test_config.py: remove unused Path import No functional change. All 131 tests remain green. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>