style: autoformat src and tests

Repository-wide formatting pass over src/ and tests/: sorted imports and
__all__ entries, dropped redundant `# -*- coding: utf-8 -*-` headers,
unquoted forward-reference annotations (safe under
`from __future__ import annotations`), merged nested `with` statements,
moved `Iterable` and friends from `typing` to `collections.abc`, and
removed `# noqa: F401` markers that no longer suppress anything.

No behavioural changes. Unit and integration suites show the same four
pre-existing failures before and after the pass.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

tests/unit/pkgmgr/actions/branch/test_close_branch.py

@@ -2,8 +2,8 @@ import unittest
 from unittest.mock import patch
 
 from pkgmgr.actions.branch.close_branch import close_branch
-from pkgmgr.core.git.errors import GitRunError
 from pkgmgr.core.git.commands import GitDeleteRemoteBranchError
+from pkgmgr.core.git.errors import GitRunError
 
 
 class TestCloseBranch(unittest.TestCase):

tests/unit/pkgmgr/actions/branch/test_drop_branch.py

@@ -2,8 +2,8 @@ import unittest
 from unittest.mock import patch
 
 from pkgmgr.actions.branch.drop_branch import drop_branch
-from pkgmgr.core.git.errors import GitRunError
 from pkgmgr.core.git.commands import GitDeleteRemoteBranchError
+from pkgmgr.core.git.errors import GitRunError
 
 
 class TestDropBranch(unittest.TestCase):

tests/unit/pkgmgr/actions/install/installers/nix/test_conflicts_resolver.py

@@ -3,7 +3,8 @@ from __future__ import annotations
 import unittest
 
 from pkgmgr.actions.install.installers.nix.conflicts import NixConflictResolver
-from ._fakes import FakeRunResult, FakeRunner, FakeRetry
+
+from ._fakes import FakeRetry, FakeRunner, FakeRunResult
 
 
 class DummyCtx:

tests/unit/pkgmgr/actions/install/installers/nix/test_inspector.py

@@ -4,7 +4,8 @@ import json
 import unittest
 
 from pkgmgr.actions.install.installers.nix.profile import NixProfileInspector
-from ._fakes import FakeRunResult, FakeRunner
+
+from ._fakes import FakeRunner, FakeRunResult
 
 
 class TestNixProfileInspector(unittest.TestCase):

tests/unit/pkgmgr/actions/install/installers/nix/test_installer_core.py

@@ -4,6 +4,7 @@ import unittest
 from unittest.mock import MagicMock
 
 from pkgmgr.actions.install.installers.nix.installer import NixFlakeInstaller
+
 from ._fakes import FakeRunResult
 
 

tests/unit/pkgmgr/actions/install/installers/nix/test_legacy.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-# -*- coding: utf-8 -*-
 
 """
 Unit tests for NixFlakeInstaller using unittest (no pytest).

tests/unit/pkgmgr/actions/install/installers/nix/test_matcher.py

@@ -2,11 +2,11 @@ from __future__ import annotations
 
 import unittest
 
-from pkgmgr.actions.install.installers.nix.profile.models import NixProfileEntry
 from pkgmgr.actions.install.installers.nix.profile.matcher import (
     entry_matches_output,
     entry_matches_store_path,
 )
+from pkgmgr.actions.install.installers.nix.profile.models import NixProfileEntry
 
 
 class TestMatcher(unittest.TestCase):

tests/unit/pkgmgr/actions/install/installers/nix/test_profile_list_reader.py

@@ -3,7 +3,8 @@ from __future__ import annotations
 import unittest
 
 from pkgmgr.actions.install.installers.nix.profile_list import NixProfileListReader
-from ._fakes import FakeRunResult, FakeRunner
+
+from ._fakes import FakeRunner, FakeRunResult
 
 
 class TestNixProfileListReader(unittest.TestCase):

tests/unit/pkgmgr/actions/install/installers/test_base.py

@@ -1,8 +1,9 @@
 # tests/unit/pkgmgr/installers/test_base.py
 
 import unittest
-from pkgmgr.actions.install.installers.base import BaseInstaller
+
 from pkgmgr.actions.install.context import RepoContext
+from pkgmgr.actions.install.installers.base import BaseInstaller
 
 
 class DummyInstaller(BaseInstaller):

tests/unit/pkgmgr/actions/install/installers/test_makefile_installer.py

@@ -2,7 +2,7 @@
 
 import os
 import unittest
-from unittest.mock import patch, mock_open
+from unittest.mock import mock_open, patch
 
 from pkgmgr.actions.install.context import RepoContext
 from pkgmgr.actions.install.installers.makefile import MakefileInstaller

tests/unit/pkgmgr/actions/install/test_capabilities.py

@@ -1,16 +1,16 @@
 # tests/unit/pkgmgr/test_capabilities.py
 
 import unittest
-from unittest.mock import patch, mock_open
+from unittest.mock import mock_open, patch
 
 from pkgmgr.actions.install.capabilities import (
-    PythonRuntimeCapability,
+    LAYER_ORDER,
+    CapabilityMatcher,
     MakeInstallCapability,
     NixFlakeCapability,
-    CapabilityMatcher,
+    PythonRuntimeCapability,
     detect_capabilities,
     resolve_effective_capabilities,
-    LAYER_ORDER,
 )
 
 

tests/unit/pkgmgr/actions/install/test_context.py

@@ -1,4 +1,5 @@
 import unittest
+
 from pkgmgr.actions.install.context import RepoContext
 
 

tests/unit/pkgmgr/actions/install/test_install_repos.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-# -*- coding: utf-8 -*-
 
 import os
 import unittest
@@ -8,7 +7,6 @@ from unittest.mock import MagicMock, patch
 
 from pkgmgr.actions.install import install_repos
 
-
 Repository = Dict[str, Any]
 
 

tests/unit/pkgmgr/actions/install/test_layers.py

@@ -1,12 +1,11 @@
 #!/usr/bin/env python3
-# -*- coding: utf-8 -*-
 
 import os
 import unittest
 
 from pkgmgr.actions.install.layers import (
-    CliLayer,
     CLI_LAYERS,
+    CliLayer,
     classify_command_layer,
     layer_priority,
 )

tests/unit/pkgmgr/actions/install/test_pipeline.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-# -*- coding: utf-8 -*-
 
 import unittest
 from unittest.mock import MagicMock, patch

tests/unit/pkgmgr/actions/mirror/test_context.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-# -*- coding: utf-8 -*-
 
 from __future__ import annotations
 

tests/unit/pkgmgr/actions/mirror/test_diff_cmd.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-# -*- coding: utf-8 -*-
 
 from __future__ import annotations
 

tests/unit/pkgmgr/actions/mirror/test_git_remote_primary_push.py

@@ -22,25 +22,24 @@ class TestGitRemotePrimaryPush(unittest.TestCase):
             },
         )
 
-        with patch("os.path.isdir", return_value=True):
-            with (
-                patch(
-                    "pkgmgr.actions.mirror.git_remote.has_origin_remote",
-                    return_value=False,
-                ),
-                patch("pkgmgr.actions.mirror.git_remote.add_remote") as m_add_remote,
-                patch(
-                    "pkgmgr.actions.mirror.git_remote.set_remote_url"
-                ) as m_set_remote_url,
-                patch(
-                    "pkgmgr.actions.mirror.git_remote.get_remote_push_urls",
-                    return_value=set(),
-                ),
-                patch(
-                    "pkgmgr.actions.mirror.git_remote.add_remote_push_url"
-                ) as m_add_push,
-            ):
-                ensure_origin_remote(repo, ctx, preview=False)
+        with (
+            patch("os.path.isdir", return_value=True), patch(
+                "pkgmgr.actions.mirror.git_remote.has_origin_remote",
+                return_value=False,
+            ),
+            patch("pkgmgr.actions.mirror.git_remote.add_remote") as m_add_remote,
+            patch(
+                "pkgmgr.actions.mirror.git_remote.set_remote_url"
+            ) as m_set_remote_url,
+            patch(
+                "pkgmgr.actions.mirror.git_remote.get_remote_push_urls",
+                return_value=set(),
+            ),
+            patch(
+                "pkgmgr.actions.mirror.git_remote.add_remote_push_url"
+            ) as m_add_push,
+        ):
+            ensure_origin_remote(repo, ctx, preview=False)
 
         # determine_primary_remote_url falls back to file order (primary first)
         m_add_remote.assert_called_once_with(

tests/unit/pkgmgr/actions/mirror/test_io.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-# -*- coding: utf-8 -*-
 
 from __future__ import annotations
 

tests/unit/pkgmgr/actions/mirror/test_list_cmd.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-# -*- coding: utf-8 -*-
 
 from __future__ import annotations
 

tests/unit/pkgmgr/actions/mirror/test_remote_provision.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-# -*- coding: utf-8 -*-
 
 from __future__ import annotations
 

tests/unit/pkgmgr/actions/mirror/test_url_utils.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-# -*- coding: utf-8 -*-
 
 from __future__ import annotations
 

tests/unit/pkgmgr/actions/mirror/test_visibility_cmd.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 import io
 import unittest
 from contextlib import redirect_stdout
-from unittest.mock import patch, MagicMock
+from unittest.mock import MagicMock, patch
 
 from pkgmgr.actions.mirror.visibility_cmd import set_mirror_visibility
 

tests/unit/pkgmgr/actions/publish/test_pypi_url.py

@@ -1,4 +1,5 @@
 import unittest
+
 from pkgmgr.actions.publish.pypi_url import parse_pypi_project_url
 
 

tests/unit/pkgmgr/actions/release/test_init.py

@@ -5,7 +5,7 @@ import unittest
 
 class TestReleasePackageInit(unittest.TestCase):
     def test_release_is_reexported(self) -> None:
-        from pkgmgr.actions.release import release  # noqa: F401
+        from pkgmgr.actions.release import release
 
         self.assertTrue(callable(release))
 

tests/unit/pkgmgr/actions/release/test_versioning.py

@@ -3,11 +3,11 @@ from __future__ import annotations
 import unittest
 from unittest.mock import patch
 
-from pkgmgr.core.version.semver import SemVer
 from pkgmgr.actions.release.versioning import (
-    determine_current_version,
     bump_semver,
+    determine_current_version,
 )
+from pkgmgr.core.version.semver import SemVer
 
 
 class TestDetermineCurrentVersion(unittest.TestCase):

tests/unit/pkgmgr/actions/repository/create/test_create_parsing.py

@@ -4,10 +4,10 @@ import unittest
 
 from pkgmgr.actions.repository.create.model import RepoParts
 from pkgmgr.actions.repository.create.parser import (
-    parse_identifier,
     _parse_git_url,
-    _strip_git_suffix,
     _split_host_port,
+    _strip_git_suffix,
+    parse_identifier,
 )
 
 

tests/unit/pkgmgr/actions/test_changelog.py

@@ -4,8 +4,8 @@ import unittest
 from unittest.mock import patch
 
 from pkgmgr.actions.changelog import generate_changelog
-from pkgmgr.core.git.queries import GitChangelogQueryError
 from pkgmgr.cli.commands.changelog import _find_previous_and_current_tag
+from pkgmgr.core.git.queries import GitChangelogQueryError
 
 
 class TestGenerateChangelog(unittest.TestCase):