fix: ruff lint + format fixes in tests, ESLint fixes in frontend

backend/app/services/vehicle_service.py

@@ -131,9 +131,7 @@ async def list_vehicles(
     return vehicles, total
 
 
-async def get_vehicle_by_id(
-    db: AsyncSession, vehicle_id: uuid.UUID
-) -> Vehicle | None:
+async def get_vehicle_by_id(db: AsyncSession, vehicle_id: uuid.UUID) -> Vehicle | None:
     """Get a single vehicle by ID, excluding soft-deleted."""
     stmt = select(Vehicle).where(
         and_(Vehicle.id == vehicle_id, Vehicle.deleted_at.is_(None))
@@ -142,20 +140,14 @@ async def get_vehicle_by_id(
     return result.scalar_one_or_none()
 
 
-async def get_vehicle_by_fin(
-    db: AsyncSession, fin: str
-) -> Vehicle | None:
+async def get_vehicle_by_fin(db: AsyncSession, fin: str) -> Vehicle | None:
     """Get a single vehicle by FIN, excluding soft-deleted."""
-    stmt = select(Vehicle).where(
-        and_(Vehicle.fin == fin, Vehicle.deleted_at.is_(None))
-    )
+    stmt = select(Vehicle).where(and_(Vehicle.fin == fin, Vehicle.deleted_at.is_(None)))
     result = await db.execute(stmt)
     return result.scalar_one_or_none()
 
 
-async def create_vehicle(
-    db: AsyncSession, data: dict[str, Any]
-) -> Vehicle:
+async def create_vehicle(db: AsyncSession, data: dict[str, Any]) -> Vehicle:
     """Create a new vehicle.
 
     Raises ValueError if FIN already exists.