refactor: improve code formatting and organization across multiple files

backend/tests/test_auth_api.py

@@ -35,9 +35,7 @@ def test_me_endpoint_returns_current_user() -> None:
     )
     token = login.json()["accessToken"]
 
-    response = client.get(
-        "/api/auth/me", headers={"Authorization": f"Bearer {token}"}
-    )
+    response = client.get("/api/auth/me", headers={"Authorization": f"Bearer {token}"})
     assert response.status_code == 200
     assert response.json()["username"] == "demo"
 

backend/tests/test_network_api.py

@@ -20,9 +20,7 @@ def test_network_snapshot_requires_authentication() -> None:
 
 def test_network_snapshot_endpoint_returns_collections() -> None:
     token = _authenticate()
-    response = client.get(
-        "/api/network", headers={"Authorization": f"Bearer {token}"}
-    )
+    response = client.get("/api/network", headers={"Authorization": f"Bearer {token}"})
     assert response.status_code == 200
 
     payload = response.json()

backend/tests/test_network_service.py

@@ -40,7 +40,9 @@ def sample_entities() -> dict[str, SimpleNamespace]:
     return {"station": station, "track": track, "train": train}
 
 
-def test_network_snapshot_prefers_repository_data(monkeypatch: pytest.MonkeyPatch, sample_entities: dict[str, SimpleNamespace]) -> None:
+def test_network_snapshot_prefers_repository_data(
+    monkeypatch: pytest.MonkeyPatch, sample_entities: dict[str, SimpleNamespace]
+) -> None:
     station = sample_entities["station"]
     track = sample_entities["track"]
     train = sample_entities["train"]
@@ -58,7 +60,9 @@ def test_network_snapshot_prefers_repository_data(monkeypatch: pytest.MonkeyPatc
     assert snapshot["trains"][0]["operatingTrackIds"] == []
 
 
-def test_network_snapshot_falls_back_when_repositories_empty(monkeypatch: pytest.MonkeyPatch) -> None:
+def test_network_snapshot_falls_back_when_repositories_empty(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
     monkeypatch.setattr(StationRepository, "list_active", lambda self: [])
     monkeypatch.setattr(TrackRepository, "list_all", lambda self: [])
     monkeypatch.setattr(TrainRepository, "list_all", lambda self: [])

backend/tests/test_repositories.py

@@ -6,6 +6,7 @@ from typing import Any, List, cast
 from uuid import uuid4
 
 import pytest
+from sqlalchemy.orm import Session
 
 from backend.app.db.models import TrainSchedule, User
 from backend.app.db.unit_of_work import SqlAlchemyUnitOfWork
@@ -23,7 +24,6 @@ from backend.app.repositories import (
     TrainScheduleRepository,
     UserRepository,
 )
-from sqlalchemy.orm import Session
 
 
 @dataclass
@@ -50,7 +50,9 @@ class DummySession:
         self.statements.append(statement)
         return self.scalar_result
 
-    def flush(self, _objects: list[Any] | None = None) -> None:  # pragma: no cover - optional
+    def flush(
+        self, _objects: list[Any] | None = None
+    ) -> None:  # pragma: no cover - optional
         return None
 
     def commit(self) -> None:  # pragma: no cover - optional
@@ -215,9 +217,7 @@ def test_unit_of_work_commits_and_closes_session() -> None:
     uow = SqlAlchemyUnitOfWork(lambda: cast(Session, session))
 
     with uow as active:
-        active.users.create(
-            UserCreate(username="demo", password_hash="hashed")
-        )
+        active.users.create(UserCreate(username="demo", password_hash="hashed"))
         active.commit()
 
     assert session.committed