refactor(backend): align api namespaces and project name

apps/backend/Contracts/Celestial.cs

@@ -1,4 +1,4 @@
-namespace SpaceGame.Simulation.Api.Contracts;
+namespace SpaceGame.Api.Contracts;
 
 public sealed record StarSnapshot(
   string Kind,

apps/backend/Contracts/Common.cs

@@ -1,4 +1,4 @@
-namespace SpaceGame.Simulation.Api.Contracts;
+namespace SpaceGame.Api.Contracts;
 
 public sealed record Vector3Dto(float X, float Y, float Z);
 

apps/backend/Contracts/Economy.cs

@@ -1,4 +1,4 @@
-namespace SpaceGame.Simulation.Api.Contracts;
+namespace SpaceGame.Api.Contracts;
 
 public sealed record MarketOrderSnapshot(
   string Id,

apps/backend/Contracts/Factions.cs

@@ -1,4 +1,4 @@
-namespace SpaceGame.Simulation.Api.Contracts;
+namespace SpaceGame.Api.Contracts;
 
 public sealed record FactionGoapStateSnapshot(
   int MilitaryShipCount,

apps/backend/Contracts/Infrastructure.cs

@@ -1,4 +1,4 @@
-namespace SpaceGame.Simulation.Api.Contracts;
+namespace SpaceGame.Api.Contracts;
 
 public sealed record InventoryEntry(
   string ItemId,

apps/backend/Contracts/Ships.cs

@@ -1,4 +1,4 @@
-namespace SpaceGame.Simulation.Api.Contracts;
+namespace SpaceGame.Api.Contracts;
 
 public sealed record ShipSnapshot(
   string Id,

apps/backend/Contracts/World.cs

@@ -1,4 +1,4 @@
-namespace SpaceGame.Simulation.Api.Contracts;
+namespace SpaceGame.Api.Contracts;
 
 public sealed record WorldSnapshot(
   string Label,

apps/backend/Data/WorldDefinitions.cs

@@ -1,6 +1,6 @@
 using System.Text.Json.Serialization;
 
-namespace SpaceGame.Simulation.Api.Data;
+namespace SpaceGame.Api.Data;
 
 public sealed class ConstructionDefinition
 {

apps/backend/Handlers/GetWorldHandler.cs

@@ -1,7 +1,7 @@
 using FastEndpoints;
-using SpaceGame.Simulation.Api.Simulation;
+using SpaceGame.Api.Simulation;
 
-namespace SpaceGame.Simulation.Api.Handlers;
+namespace SpaceGame.Api.Handlers;
 
 public sealed class GetWorldHandler(WorldService worldService) : EndpointWithoutRequest
 {

apps/backend/Handlers/GetWorldHealthHandler.cs

@@ -1,7 +1,7 @@
 using FastEndpoints;
-using SpaceGame.Simulation.Api.Simulation;
+using SpaceGame.Api.Simulation;
 
-namespace SpaceGame.Simulation.Api.Handlers;
+namespace SpaceGame.Api.Handlers;
 
 public sealed class GetWorldHealthHandler(WorldService worldService) : EndpointWithoutRequest
 {

apps/backend/Handlers/ResetWorldHandler.cs

@@ -1,7 +1,7 @@
 using FastEndpoints;
-using SpaceGame.Simulation.Api.Simulation;
+using SpaceGame.Api.Simulation;
 
-namespace SpaceGame.Simulation.Api.Handlers;
+namespace SpaceGame.Api.Handlers;
 
 public sealed class ResetWorldHandler(WorldService worldService) : EndpointWithoutRequest
 {

apps/backend/Handlers/RootRedirectHandler.cs

@@ -1,6 +1,6 @@
 using FastEndpoints;
 
-namespace SpaceGame.Simulation.Api.Handlers;
+namespace SpaceGame.Api.Handlers;
 
 public sealed class RootRedirectHandler : EndpointWithoutRequest
 {

apps/backend/Handlers/StreamWorldHandler.cs

@@ -1,9 +1,9 @@
 using System.Text.Json;
 using FastEndpoints;
-using SpaceGame.Simulation.Api.Contracts;
-using SpaceGame.Simulation.Api.Simulation;
+using SpaceGame.Api.Contracts;
+using SpaceGame.Api.Simulation;
 
-namespace SpaceGame.Simulation.Api.Handlers;
+namespace SpaceGame.Api.Handlers;
 
 public sealed class StreamWorldHandler(WorldService worldService) : EndpointWithoutRequest
 {

apps/backend/Program.cs

@@ -1,5 +1,5 @@
 using FastEndpoints;
-using SpaceGame.Simulation.Api.Simulation;
+using SpaceGame.Api.Simulation;
 
 var builder = WebApplication.CreateBuilder(args);
 

apps/backend/Simulation/AI/FactionController.cs

@@ -1,4 +1,7 @@
-namespace SpaceGame.Simulation.Api.Simulation;
+using SpaceGame.Api.Simulation.Engine;
+using SpaceGame.Api.Simulation.Model;
+
+namespace SpaceGame.Api.Simulation.AI;
 
 // ─── Planning State ────────────────────────────────────────────────────────────
 

apps/backend/Simulation/AI/GoapCore.cs

@@ -1,4 +1,7 @@
-namespace SpaceGame.Simulation.Api.Simulation;
+using SpaceGame.Api.Simulation.Engine;
+using SpaceGame.Api.Simulation.Model;
+
+namespace SpaceGame.Api.Simulation.AI;
 
 public abstract class GoapAction<TState>
 {

apps/backend/Simulation/AI/IShipBehaviorState.cs

@@ -1,10 +1,13 @@
-namespace SpaceGame.Simulation.Api.Simulation;
+using SpaceGame.Api.Simulation.Engine;
+using SpaceGame.Api.Simulation.Model;
+
+namespace SpaceGame.Api.Simulation.AI;
 
 internal interface IShipBehaviorState
 {
-    string Kind { get; }
+  string Kind { get; }
 
-    void Plan(SimulationEngine engine, ShipRuntime ship, SimulationWorld world);
+  void Plan(SimulationEngine engine, ShipRuntime ship, SimulationWorld world);
 
-    void ApplyEvent(SimulationEngine engine, ShipRuntime ship, SimulationWorld world, string controllerEvent);
+  void ApplyEvent(SimulationEngine engine, ShipRuntime ship, SimulationWorld world, string controllerEvent);
 }

apps/backend/Simulation/AI/ShipBehaviorStateMachine.cs

@@ -1,38 +1,41 @@
-namespace SpaceGame.Simulation.Api.Simulation;
+using SpaceGame.Api.Simulation.Engine;
+using SpaceGame.Api.Simulation.Model;
+
+namespace SpaceGame.Api.Simulation.AI;
 
 internal sealed class ShipBehaviorStateMachine
 {
-    private readonly IReadOnlyDictionary<string, IShipBehaviorState> states;
-    private readonly IShipBehaviorState fallbackState;
+  private readonly IReadOnlyDictionary<string, IShipBehaviorState> states;
+  private readonly IShipBehaviorState fallbackState;
 
-    private ShipBehaviorStateMachine(IReadOnlyDictionary<string, IShipBehaviorState> states, IShipBehaviorState fallbackState)
-    {
-        this.states = states;
-        this.fallbackState = fallbackState;
-    }
+  private ShipBehaviorStateMachine(IReadOnlyDictionary<string, IShipBehaviorState> states, IShipBehaviorState fallbackState)
+  {
+    this.states = states;
+    this.fallbackState = fallbackState;
+  }
 
-    public static ShipBehaviorStateMachine CreateDefault()
+  public static ShipBehaviorStateMachine CreateDefault()
+  {
+    var idleState = new IdleShipBehaviorState();
+    var knownStates = new IShipBehaviorState[]
     {
-        var idleState = new IdleShipBehaviorState();
-        var knownStates = new IShipBehaviorState[]
-        {
             idleState,
             new PatrolShipBehaviorState(),
             new ResourceHarvestShipBehaviorState("auto-mine", "ore", "mining"),
             new ConstructStationShipBehaviorState(),
-        };
+    };
 
-        return new ShipBehaviorStateMachine(
-            knownStates.ToDictionary(state => state.Kind, StringComparer.Ordinal),
-            idleState);
-    }
+    return new ShipBehaviorStateMachine(
+        knownStates.ToDictionary(state => state.Kind, StringComparer.Ordinal),
+        idleState);
+  }
 
-    public void Plan(SimulationEngine engine, ShipRuntime ship, SimulationWorld world) =>
-        Resolve(ship.DefaultBehavior.Kind).Plan(engine, ship, world);
+  public void Plan(SimulationEngine engine, ShipRuntime ship, SimulationWorld world) =>
+      Resolve(ship.DefaultBehavior.Kind).Plan(engine, ship, world);
 
-    public void ApplyEvent(SimulationEngine engine, ShipRuntime ship, SimulationWorld world, string controllerEvent) =>
-        Resolve(ship.DefaultBehavior.Kind).ApplyEvent(engine, ship, world, controllerEvent);
+  public void ApplyEvent(SimulationEngine engine, ShipRuntime ship, SimulationWorld world, string controllerEvent) =>
+      Resolve(ship.DefaultBehavior.Kind).ApplyEvent(engine, ship, world, controllerEvent);
 
-    private IShipBehaviorState Resolve(string kind) =>
-        states.TryGetValue(kind, out var state) ? state : fallbackState;
+  private IShipBehaviorState Resolve(string kind) =>
+      states.TryGetValue(kind, out var state) ? state : fallbackState;
 }

apps/backend/Simulation/AI/ShipBehaviorStates.cs

@@ -1,4 +1,7 @@
-namespace SpaceGame.Simulation.Api.Simulation;
+using SpaceGame.Api.Simulation.Engine;
+using SpaceGame.Api.Simulation.Model;
+
+namespace SpaceGame.Api.Simulation.AI;
 
 internal sealed class IdleShipBehaviorState : IShipBehaviorState
 {

apps/backend/Simulation/AI/ShipController.cs

@@ -1,4 +1,7 @@
-namespace SpaceGame.Simulation.Api.Simulation;
+using SpaceGame.Api.Simulation.Engine;
+using SpaceGame.Api.Simulation.Model;
+
+namespace SpaceGame.Api.Simulation.AI;
 
 // ─── Planning State ────────────────────────────────────────────────────────────
 

apps/backend/Simulation/Model/CommerceRuntimeModels.cs

@@ -1,30 +1,30 @@
-namespace SpaceGame.Simulation.Api.Simulation;
+namespace SpaceGame.Api.Simulation.Model;
 
 public sealed class MarketOrderRuntime
 {
-    public required string Id { get; init; }
-    public required string FactionId { get; init; }
-    public string? StationId { get; init; }
-    public string? ConstructionSiteId { get; init; }
-    public required string Kind { get; init; }
-    public required string ItemId { get; init; }
-    public float Amount { get; init; }
-    public float RemainingAmount { get; set; }
-    public float Valuation { get; set; }
-    public float? ReserveThreshold { get; set; }
-    public string? PolicySetId { get; set; }
-    public string State { get; set; } = MarketOrderStateKinds.Open;
-    public string LastDeltaSignature { get; set; } = string.Empty;
+  public required string Id { get; init; }
+  public required string FactionId { get; init; }
+  public string? StationId { get; init; }
+  public string? ConstructionSiteId { get; init; }
+  public required string Kind { get; init; }
+  public required string ItemId { get; init; }
+  public float Amount { get; init; }
+  public float RemainingAmount { get; set; }
+  public float Valuation { get; set; }
+  public float? ReserveThreshold { get; set; }
+  public string? PolicySetId { get; set; }
+  public string State { get; set; } = MarketOrderStateKinds.Open;
+  public string LastDeltaSignature { get; set; } = string.Empty;
 }
 
 public sealed class PolicySetRuntime
 {
-    public required string Id { get; init; }
-    public required string OwnerKind { get; init; }
-    public required string OwnerId { get; init; }
-    public string TradeAccessPolicy { get; set; } = "owner-and-allies";
-    public string DockingAccessPolicy { get; set; } = "owner-and-allies";
-    public string ConstructionAccessPolicy { get; set; } = "owner-only";
-    public string OperationalRangePolicy { get; set; } = "unrestricted";
-    public string LastDeltaSignature { get; set; } = string.Empty;
+  public required string Id { get; init; }
+  public required string OwnerKind { get; init; }
+  public required string OwnerId { get; init; }
+  public string TradeAccessPolicy { get; set; } = "owner-and-allies";
+  public string DockingAccessPolicy { get; set; } = "owner-and-allies";
+  public string ConstructionAccessPolicy { get; set; } = "owner-only";
+  public string OperationalRangePolicy { get; set; } = "unrestricted";
+  public string LastDeltaSignature { get; set; } = string.Empty;
 }

apps/backend/Simulation/Model/ConstructionRuntimeModels.cs

@@ -1,36 +1,36 @@
-namespace SpaceGame.Simulation.Api.Simulation;
+namespace SpaceGame.Api.Simulation.Model;
 
 public sealed class ClaimRuntime
 {
-    public required string Id { get; init; }
-    public required string FactionId { get; init; }
-    public required string SystemId { get; init; }
-    public required string CelestialId { get; init; }
-    public string? CommanderId { get; set; }
-    public DateTimeOffset PlacedAtUtc { get; init; }
-    public DateTimeOffset ActivatesAtUtc { get; set; }
-    public string State { get; set; } = ClaimStateKinds.Placed;
-    public float Health { get; set; }
-    public string LastDeltaSignature { get; set; } = string.Empty;
+  public required string Id { get; init; }
+  public required string FactionId { get; init; }
+  public required string SystemId { get; init; }
+  public required string CelestialId { get; init; }
+  public string? CommanderId { get; set; }
+  public DateTimeOffset PlacedAtUtc { get; init; }
+  public DateTimeOffset ActivatesAtUtc { get; set; }
+  public string State { get; set; } = ClaimStateKinds.Placed;
+  public float Health { get; set; }
+  public string LastDeltaSignature { get; set; } = string.Empty;
 }
 
 public sealed class ConstructionSiteRuntime
 {
-    public required string Id { get; init; }
-    public required string FactionId { get; init; }
-    public required string SystemId { get; init; }
-    public required string CelestialId { get; init; }
-    public required string TargetKind { get; init; }
-    public required string TargetDefinitionId { get; init; }
-    public string? BlueprintId { get; set; }
-    public string? ClaimId { get; set; }
-    public string? StationId { get; set; }
-    public Dictionary<string, float> Inventory { get; } = new(StringComparer.Ordinal);
-    public Dictionary<string, float> RequiredItems { get; } = new(StringComparer.Ordinal);
-    public Dictionary<string, float> DeliveredItems { get; } = new(StringComparer.Ordinal);
-    public HashSet<string> AssignedConstructorShipIds { get; } = new(StringComparer.Ordinal);
-    public HashSet<string> MarketOrderIds { get; } = new(StringComparer.Ordinal);
-    public float Progress { get; set; }
-    public string State { get; set; } = ConstructionSiteStateKinds.Planned;
-    public string LastDeltaSignature { get; set; } = string.Empty;
+  public required string Id { get; init; }
+  public required string FactionId { get; init; }
+  public required string SystemId { get; init; }
+  public required string CelestialId { get; init; }
+  public required string TargetKind { get; init; }
+  public required string TargetDefinitionId { get; init; }
+  public string? BlueprintId { get; set; }
+  public string? ClaimId { get; set; }
+  public string? StationId { get; set; }
+  public Dictionary<string, float> Inventory { get; } = new(StringComparer.Ordinal);
+  public Dictionary<string, float> RequiredItems { get; } = new(StringComparer.Ordinal);
+  public Dictionary<string, float> DeliveredItems { get; } = new(StringComparer.Ordinal);
+  public HashSet<string> AssignedConstructorShipIds { get; } = new(StringComparer.Ordinal);
+  public HashSet<string> MarketOrderIds { get; } = new(StringComparer.Ordinal);
+  public float Progress { get; set; }
+  public string State { get; set; } = ConstructionSiteStateKinds.Planned;
+  public string LastDeltaSignature { get; set; } = string.Empty;
 }

apps/backend/Simulation/Model/FactionRuntimeModels.cs

@@ -1,73 +1,75 @@
-namespace SpaceGame.Simulation.Api.Simulation;
+using SpaceGame.Api.Simulation.AI;
+
+namespace SpaceGame.Api.Simulation.Model;
 
 public sealed class FactionRuntime
 {
-    public required string Id { get; init; }
-    public required string Label { get; init; }
-    public required string Color { get; init; }
-    public float Credits { get; set; }
-    public float PopulationTotal { get; set; }
-    public float OreMined { get; set; }
-    public float GoodsProduced { get; set; }
-    public int ShipsBuilt { get; set; }
-    public int ShipsLost { get; set; }
-    public HashSet<string> CommanderIds { get; } = new(StringComparer.Ordinal);
-    public string? DefaultPolicySetId { get; set; }
-    public string LastDeltaSignature { get; set; } = string.Empty;
+  public required string Id { get; init; }
+  public required string Label { get; init; }
+  public required string Color { get; init; }
+  public float Credits { get; set; }
+  public float PopulationTotal { get; set; }
+  public float OreMined { get; set; }
+  public float GoodsProduced { get; set; }
+  public int ShipsBuilt { get; set; }
+  public int ShipsLost { get; set; }
+  public HashSet<string> CommanderIds { get; } = new(StringComparer.Ordinal);
+  public string? DefaultPolicySetId { get; set; }
+  public string LastDeltaSignature { get; set; } = string.Empty;
 }
 
 public sealed class CommanderRuntime
 {
-    public required string Id { get; init; }
-    public required string Kind { get; set; }
-    public required string FactionId { get; init; }
-    public string? ParentCommanderId { get; set; }
-    public string? ControlledEntityId { get; set; }
-    public string? PolicySetId { get; set; }
-    public string? Doctrine { get; set; }
-    public List<string> Goals { get; } = [];
-    public HashSet<string> ActiveDirectives { get; } = new(StringComparer.Ordinal);
-    public string? ActiveGoalName { get; set; }
-    public string? ActiveActionName { get; set; }
-    public float ReplanTimer { get; set; }
-    public bool NeedsReplan { get; set; } = true;
-    public CommanderBehaviorRuntime? ActiveBehavior { get; set; }
-    public CommanderOrderRuntime? ActiveOrder { get; set; }
-    public CommanderTaskRuntime? ActiveTask { get; set; }
-    public HashSet<string> SubordinateCommanderIds { get; } = new(StringComparer.Ordinal);
-    public bool IsAlive { get; set; } = true;
-    public FactionPlanningState? LastPlanningState { get; set; }
-    public IReadOnlyList<(string Name, float Priority)>? LastGoalPriorities { get; set; }
+  public required string Id { get; init; }
+  public required string Kind { get; set; }
+  public required string FactionId { get; init; }
+  public string? ParentCommanderId { get; set; }
+  public string? ControlledEntityId { get; set; }
+  public string? PolicySetId { get; set; }
+  public string? Doctrine { get; set; }
+  public List<string> Goals { get; } = [];
+  public HashSet<string> ActiveDirectives { get; } = new(StringComparer.Ordinal);
+  public string? ActiveGoalName { get; set; }
+  public string? ActiveActionName { get; set; }
+  public float ReplanTimer { get; set; }
+  public bool NeedsReplan { get; set; } = true;
+  public CommanderBehaviorRuntime? ActiveBehavior { get; set; }
+  public CommanderOrderRuntime? ActiveOrder { get; set; }
+  public CommanderTaskRuntime? ActiveTask { get; set; }
+  public HashSet<string> SubordinateCommanderIds { get; } = new(StringComparer.Ordinal);
+  public bool IsAlive { get; set; } = true;
+  public FactionPlanningState? LastPlanningState { get; set; }
+  public IReadOnlyList<(string Name, float Priority)>? LastGoalPriorities { get; set; }
 }
 
 public sealed class CommanderBehaviorRuntime
 {
-    public required string Kind { get; set; }
-    public string? Phase { get; set; }
-    public string? NodeId { get; set; }
-    public string? StationId { get; set; }
-    public string? ModuleId { get; set; }
-    public string? AreaSystemId { get; set; }
-    public int PatrolIndex { get; set; }
+  public required string Kind { get; set; }
+  public string? Phase { get; set; }
+  public string? NodeId { get; set; }
+  public string? StationId { get; set; }
+  public string? ModuleId { get; set; }
+  public string? AreaSystemId { get; set; }
+  public int PatrolIndex { get; set; }
 }
 
 public sealed class CommanderOrderRuntime
 {
-    public required string Kind { get; init; }
-    public OrderStatus Status { get; set; } = OrderStatus.Accepted;
-    public string? TargetEntityId { get; set; }
-    public string? DestinationNodeId { get; set; }
-    public required string DestinationSystemId { get; init; }
-    public required Vector3 DestinationPosition { get; init; }
+  public required string Kind { get; init; }
+  public OrderStatus Status { get; set; } = OrderStatus.Accepted;
+  public string? TargetEntityId { get; set; }
+  public string? DestinationNodeId { get; set; }
+  public required string DestinationSystemId { get; init; }
+  public required Vector3 DestinationPosition { get; init; }
 }
 
 public sealed class CommanderTaskRuntime
 {
-    public required string Kind { get; set; }
-    public WorkStatus Status { get; set; } = WorkStatus.Pending;
-    public string? TargetEntityId { get; set; }
-    public string? TargetSystemId { get; set; }
-    public string? TargetNodeId { get; set; }
-    public Vector3? TargetPosition { get; set; }
-    public float Threshold { get; set; }
+  public required string Kind { get; set; }
+  public WorkStatus Status { get; set; } = WorkStatus.Pending;
+  public string? TargetEntityId { get; set; }
+  public string? TargetSystemId { get; set; }
+  public string? TargetNodeId { get; set; }
+  public Vector3? TargetPosition { get; set; }
+  public float Threshold { get; set; }
 }

apps/backend/Simulation/Model/ShipRuntimeModels.cs

@@ -1,6 +1,6 @@
-using SpaceGame.Simulation.Api.Data;
+using SpaceGame.Api.Data;
 
-namespace SpaceGame.Simulation.Api.Simulation;
+namespace SpaceGame.Api.Simulation.Model;
 
 public sealed class ShipRuntime
 {

apps/backend/Simulation/Model/SimulationKinds.cs

@@ -1,4 +1,4 @@
-namespace SpaceGame.Simulation.Api.Simulation;
+namespace SpaceGame.Api.Simulation.Model;
 
 public enum SpatialNodeKind
 {

apps/backend/Simulation/Model/SimulationUnits.cs

@@ -1,4 +1,4 @@
-namespace SpaceGame.Simulation.Api.Simulation;
+namespace SpaceGame.Api.Simulation.Model;
 
 public static class SimulationUnits
 {

apps/backend/Simulation/Model/SimulationWorld.cs

@@ -1,6 +1,6 @@
-using SpaceGame.Simulation.Api.Data;
+using SpaceGame.Api.Data;
 
-namespace SpaceGame.Simulation.Api.Simulation;
+namespace SpaceGame.Api.Simulation.Model;
 
 public sealed class SimulationWorld
 {

apps/backend/Simulation/Model/SpatialRuntimeModels.cs

@@ -1,6 +1,6 @@
-using SpaceGame.Simulation.Api.Data;
+using SpaceGame.Api.Data;
 
-namespace SpaceGame.Simulation.Api.Simulation;
+namespace SpaceGame.Api.Simulation.Model;
 
 public sealed class SystemRuntime
 {

apps/backend/Simulation/Model/StationRuntimeModels.cs

@@ -1,4 +1,4 @@
-namespace SpaceGame.Simulation.Api.Simulation;
+namespace SpaceGame.Api.Simulation.Model;
 
 public sealed class StationRuntime
 {

apps/backend/Simulation/Model/Vector3.cs

@@ -1,4 +1,4 @@
-namespace SpaceGame.Simulation.Api.Simulation;
+namespace SpaceGame.Api.Simulation.Model;
 
 public readonly record struct Vector3(float X, float Y, float Z)
 {

apps/backend/Simulation/OrbitalSimulationOptions.cs

@@ -1,4 +1,4 @@
-namespace SpaceGame.Simulation.Api.Simulation;
+namespace SpaceGame.Api.Simulation;
 
 public sealed class OrbitalSimulationOptions
 {

apps/backend/Simulation/SimulationHostedService.cs

@@ -1,4 +1,4 @@
-namespace SpaceGame.Simulation.Api.Simulation;
+namespace SpaceGame.Api.Simulation;
 
 public sealed class SimulationHostedService(WorldService worldService) : BackgroundService
 {

apps/backend/Simulation/WorldGenerationOptions.cs

@@ -1,4 +1,4 @@
-namespace SpaceGame.Simulation.Api.Simulation;
+namespace SpaceGame.Api.Simulation;
 
 public sealed class WorldGenerationOptions
 {

apps/backend/Simulation/WorldService.cs

@@ -1,8 +1,10 @@
 using System.Threading.Channels;
 using Microsoft.Extensions.Options;
-using SpaceGame.Simulation.Api.Contracts;
+using SpaceGame.Api.Contracts;
+using SpaceGame.Api.Simulation.Engine;
+using SpaceGame.Api.Simulation.Model;
 
-namespace SpaceGame.Simulation.Api.Simulation;
+namespace SpaceGame.Api.Simulation;
 
 public sealed class WorldService(
   IWebHostEnvironment environment,
@@ -11,7 +13,7 @@ public sealed class WorldService(
 {
   private const int DeltaHistoryLimit = 256;
 
-  private readonly object _sync = new();
+  private readonly Lock _sync = new();
   private readonly OrbitalSimulationSnapshot _orbitalSimulation = new(orbitalSimulationOptions.Value.SimulatedSecondsPerRealSecond);
   private readonly ScenarioLoader _loader = new(environment.ContentRootPath, worldGenerationOptions.Value);
   private readonly SimulationEngine _engine = new(orbitalSimulationOptions.Value);