fix: formatting (black)

backend/app/services/network.py

@@ -148,7 +148,11 @@ def get_network_snapshot(session: Session) -> dict[str, list[dict[str, object]]]
             if geometry is not None and LineString is not None
             else None
         )
-        if LineString is not None and shape is not None and isinstance(shape, LineString):
+        if (
+            LineString is not None
+            and shape is not None
+            and isinstance(shape, LineString)
+        ):
             coords_list: list[tuple[float, float]] = []
             for coord in shape.coords:
                 lon = float(coord[0])

backend/scripts/stations_import.py

@@ -98,14 +98,12 @@ def normalize_station_elements(
         if not name:
             continue
 
-        raw_code = tags.get("ref") or tags.get(
-            "railway:ref") or tags.get("local_ref")
+        raw_code = tags.get("ref") or tags.get("railway:ref") or tags.get("local_ref")
         code = str(raw_code) if raw_code is not None else None
 
         elevation_tag = tags.get("ele") or tags.get("elevation")
         try:
-            elevation = float(
-                elevation_tag) if elevation_tag is not None else None
+            elevation = float(elevation_tag) if elevation_tag is not None else None
         except (TypeError, ValueError):
             elevation = None
 

backend/scripts/tracks_import.py

@@ -56,7 +56,8 @@ def build_overpass_query(region_name: str) -> str:
         regions = DEFAULT_REGIONS
     else:
         regions = tuple(
-            region for region in DEFAULT_REGIONS if region.name == region_name)
+            region for region in DEFAULT_REGIONS if region.name == region_name
+        )
         if not regions:
             available = ", ".join(region.name for region in DEFAULT_REGIONS)
             msg = f"Unknown region {region_name}. Available regions: [{available}]"
@@ -86,7 +87,9 @@ def perform_request(query: str) -> dict[str, Any]:
     return json.loads(payload)
 
 
-def normalize_track_elements(elements: Iterable[dict[str, Any]]) -> list[dict[str, Any]]:
+def normalize_track_elements(
+    elements: Iterable[dict[str, Any]]
+) -> list[dict[str, Any]]:
     """Convert Overpass way elements into TrackCreate-compatible payloads."""
 
     tracks: list[dict[str, Any]] = []

backend/scripts/tracks_load.py

@@ -91,13 +91,13 @@ def _parse_track_entries(entries: Iterable[Mapping[str, Any]]) -> list[ParsedTra
         coordinates = entry.get("coordinates")
         if not isinstance(coordinates, Sequence) or len(coordinates) < 2:
             raise ValueError(
-                "Invalid track entry: 'coordinates' must contain at least two points")
+                "Invalid track entry: 'coordinates' must contain at least two points"
+            )
 
         processed_coordinates: list[tuple[float, float]] = []
         for pair in coordinates:
             if not isinstance(pair, Sequence) or len(pair) != 2:
-                raise ValueError(
-                    f"Invalid coordinate pair {pair!r} in track entry")
+                raise ValueError(f"Invalid coordinate pair {pair!r} in track entry")
             lat, lon = pair
             processed_coordinates.append((float(lat), float(lon)))
 
@@ -155,7 +155,8 @@ def load_tracks(tracks: Iterable[ParsedTrack], commit: bool = True) -> int:
                 continue
 
             length = track_data.length_meters or _polyline_length(
-                track_data.coordinates)
+                track_data.coordinates
+            )
             max_speed = (
                 int(round(track_data.max_speed_kph))
                 if track_data.max_speed_kph is not None
@@ -192,8 +193,7 @@ def _nearest_station(
     best_station: StationRef | None = None
     best_distance = math.inf
     for station in stations:
-        distance = _haversine(
-            coordinate, (station.latitude, station.longitude))
+        distance = _haversine(coordinate, (station.latitude, station.longitude))
         if distance < best_distance:
             best_station = station
             best_distance = distance
@@ -229,7 +229,9 @@ def _to_point(geometry: WKBElement | WKTElement | Any):
     try:
         point = to_shape(geometry)
         return point if getattr(point, "geom_type", None) == "Point" else None
-    except Exception:  # pragma: no cover - defensive, should not happen with valid geometry
+    except (
+        Exception
+    ):  # pragma: no cover - defensive, should not happen with valid geometry
         return None
 
 

backend/tests/test_network_service.py

@@ -50,8 +50,7 @@ def test_network_snapshot_prefers_repository_data(
     track = sample_entities["track"]
     train = sample_entities["train"]
 
-    monkeypatch.setattr(StationRepository, "list_active",
-                        lambda self: [station])
+    monkeypatch.setattr(StationRepository, "list_active", lambda self: [station])
     monkeypatch.setattr(TrackRepository, "list_all", lambda self: [track])
     monkeypatch.setattr(TrainRepository, "list_all", lambda self: [train])
 
@@ -59,8 +58,7 @@ def test_network_snapshot_prefers_repository_data(
 
     assert snapshot["stations"]
     assert snapshot["stations"][0]["name"] == station.name
-    assert snapshot["tracks"][0]["lengthMeters"] == pytest.approx(
-        track.length_meters)
+    assert snapshot["tracks"][0]["lengthMeters"] == pytest.approx(track.length_meters)
     assert snapshot["trains"][0]["designation"] == train.designation
     assert snapshot["trains"][0]["operatingTrackIds"] == []
 
@@ -76,5 +74,4 @@ def test_network_snapshot_falls_back_when_repositories_empty(
 
     assert snapshot["stations"]
     assert snapshot["trains"]
-    assert any(station["name"] ==
-               "Central" for station in snapshot["stations"])
+    assert any(station["name"] == "Central" for station in snapshot["stations"])

backend/tests/test_osm_refresh.py

@@ -58,7 +58,9 @@ def test_build_stage_plan_respects_skip_flags(tmp_path: Path) -> None:
     assert labels == ["Load stations", "Load tracks"]
 
 
-def test_main_dry_run_lists_plan(monkeypatch: pytest.MonkeyPatch, tmp_path: Path, capsys: pytest.CaptureFixture[str]) -> None:
+def test_main_dry_run_lists_plan(
+    monkeypatch: pytest.MonkeyPatch, tmp_path: Path, capsys: pytest.CaptureFixture[str]
+) -> None:
     def fail(_args: list[str] | None) -> int:  # pragma: no cover - defensive
         raise AssertionError("runner should not be invoked during dry run")
 
@@ -76,7 +78,9 @@ def test_main_dry_run_lists_plan(monkeypatch: pytest.MonkeyPatch, tmp_path: Path
     assert "Load tracks" in captured
 
 
-def test_main_executes_stages_in_order(monkeypatch: pytest.MonkeyPatch, tmp_path: Path) -> None:
+def test_main_executes_stages_in_order(
+    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+) -> None:
     calls: list[str] = []
 
     def make_import(name: str):
@@ -98,14 +102,12 @@ def test_main_executes_stages_in_order(monkeypatch: pytest.MonkeyPatch, tmp_path
 
         return runner
 
-    monkeypatch.setattr(osm_refresh.stations_import, "main",
-                        make_import("stations_import"))
-    monkeypatch.setattr(osm_refresh.tracks_import, "main",
-                        make_import("tracks_import"))
-    monkeypatch.setattr(osm_refresh.stations_load, "main",
-                        make_load("stations_load"))
-    monkeypatch.setattr(osm_refresh.tracks_load, "main",
-                        make_load("tracks_load"))
+    monkeypatch.setattr(
+        osm_refresh.stations_import, "main", make_import("stations_import")
+    )
+    monkeypatch.setattr(osm_refresh.tracks_import, "main", make_import("tracks_import"))
+    monkeypatch.setattr(osm_refresh.stations_load, "main", make_load("stations_load"))
+    monkeypatch.setattr(osm_refresh.tracks_load, "main", make_load("tracks_load"))
 
     exit_code = osm_refresh.main(["--output-dir", str(tmp_path)])
 
@@ -118,7 +120,9 @@ def test_main_executes_stages_in_order(monkeypatch: pytest.MonkeyPatch, tmp_path
     ]
 
 
-def test_main_skip_import_flags(monkeypatch: pytest.MonkeyPatch, tmp_path: Path) -> None:
+def test_main_skip_import_flags(
+    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+) -> None:
     station_json = tmp_path / "stations.json"
     station_json.write_text("{}", encoding="utf-8")
     track_json = tmp_path / "tracks.json"
@@ -139,8 +143,7 @@ def test_main_skip_import_flags(monkeypatch: pytest.MonkeyPatch, tmp_path: Path)
 
     monkeypatch.setattr(osm_refresh.stations_import, "main", fail)
     monkeypatch.setattr(osm_refresh.tracks_import, "main", fail)
-    monkeypatch.setattr(osm_refresh.stations_load,
-                        "main", record("stations_load"))
+    monkeypatch.setattr(osm_refresh.stations_load, "main", record("stations_load"))
     monkeypatch.setattr(osm_refresh.tracks_load, "main", record("tracks_load"))
 
     exit_code = osm_refresh.main(

backend/tests/test_tracks_load.py

@@ -103,10 +103,12 @@ def test_load_tracks_creates_entries(monkeypatch: pytest.MonkeyPatch) -> None:
     track_repo_instance = DummyTrackRepository(session_instance)
 
     monkeypatch.setattr(tracks_load, "SessionLocal", lambda: session_instance)
-    monkeypatch.setattr(tracks_load, "StationRepository",
-                        lambda session: station_repo_instance)
-    monkeypatch.setattr(tracks_load, "TrackRepository",
-                        lambda session: track_repo_instance)
+    monkeypatch.setattr(
+        tracks_load, "StationRepository", lambda session: station_repo_instance
+    )
+    monkeypatch.setattr(
+        tracks_load, "TrackRepository", lambda session: track_repo_instance
+    )
 
     parsed = tracks_load._parse_track_entries(
         [
@@ -137,20 +139,26 @@ def test_load_tracks_skips_existing_pairs(monkeypatch: pytest.MonkeyPatch) -> No
             DummyStation(id="station-b", location=_point(52.6, 13.5)),
         ],
     )
-    existing_track = type("ExistingTrack", (), {
-        "start_station_id": "station-a",
-        "end_station_id": "station-b",
-    })
+    existing_track = type(
+        "ExistingTrack",
+        (),
+        {
+            "start_station_id": "station-a",
+            "end_station_id": "station-b",
+        },
+    )
     track_repo_instance = DummyTrackRepository(
         session_instance,
         existing=[existing_track],
     )
 
     monkeypatch.setattr(tracks_load, "SessionLocal", lambda: session_instance)
-    monkeypatch.setattr(tracks_load, "StationRepository",
-                        lambda session: station_repo_instance)
-    monkeypatch.setattr(tracks_load, "TrackRepository",
-                        lambda session: track_repo_instance)
+    monkeypatch.setattr(
+        tracks_load, "StationRepository", lambda session: station_repo_instance
+    )
+    monkeypatch.setattr(
+        tracks_load, "TrackRepository", lambda session: track_repo_instance
+    )
 
     parsed = tracks_load._parse_track_entries(
         [
@@ -168,7 +176,9 @@ def test_load_tracks_skips_existing_pairs(monkeypatch: pytest.MonkeyPatch) -> No
     assert not track_repo_instance.created
 
 
-def test_load_tracks_skips_when_station_too_far(monkeypatch: pytest.MonkeyPatch) -> None:
+def test_load_tracks_skips_when_station_too_far(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
     session_instance = DummySession()
     station_repo_instance = DummyStationRepository(
         session_instance,
@@ -179,10 +189,12 @@ def test_load_tracks_skips_when_station_too_far(monkeypatch: pytest.MonkeyPatch)
     track_repo_instance = DummyTrackRepository(session_instance)
 
     monkeypatch.setattr(tracks_load, "SessionLocal", lambda: session_instance)
-    monkeypatch.setattr(tracks_load, "StationRepository",
-                        lambda session: station_repo_instance)
-    monkeypatch.setattr(tracks_load, "TrackRepository",
-                        lambda session: track_repo_instance)
+    monkeypatch.setattr(
+        tracks_load, "StationRepository", lambda session: station_repo_instance
+    )
+    monkeypatch.setattr(
+        tracks_load, "TrackRepository", lambda session: track_repo_instance
+    )
 
     parsed = tracks_load._parse_track_entries(
         [