Refactor backend into domain-first slices

apps/backend/Universe/Runtime/SimulationWorld.cs

@@ -0,0 +1,28 @@
+
+namespace SpaceGame.Api.Universe.Runtime;
+
+public sealed class SimulationWorld
+{
+    public required string Label { get; init; }
+    public required int Seed { get; init; }
+    public required BalanceDefinition Balance { get; init; }
+    public required List<SystemRuntime> Systems { get; init; }
+    public required List<ResourceNodeRuntime> Nodes { get; init; }
+    public required List<CelestialRuntime> Celestials { get; init; }
+    public required List<StationRuntime> Stations { get; init; }
+    public required List<ShipRuntime> Ships { get; init; }
+    public required List<FactionRuntime> Factions { get; init; }
+    public required List<CommanderRuntime> Commanders { get; init; }
+    public required List<ClaimRuntime> Claims { get; init; }
+    public required List<ConstructionSiteRuntime> ConstructionSites { get; init; }
+    public required List<MarketOrderRuntime> MarketOrders { get; init; }
+    public required List<PolicySetRuntime> Policies { get; init; }
+    public required Dictionary<string, ShipDefinition> ShipDefinitions { get; init; }
+    public required Dictionary<string, ItemDefinition> ItemDefinitions { get; init; }
+    public required Dictionary<string, ModuleDefinition> ModuleDefinitions { get; init; }
+    public required Dictionary<string, ModuleRecipeDefinition> ModuleRecipes { get; init; }
+    public required Dictionary<string, RecipeDefinition> Recipes { get; init; }
+    public int TickIntervalMs { get; init; } = 200;
+    public double OrbitalTimeSeconds { get; set; }
+    public DateTimeOffset GeneratedAtUtc { get; set; }
+}

apps/backend/Universe/Runtime/SpatialRuntimeModels.cs

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+
+namespace SpaceGame.Api.Universe.Runtime;
+
+public sealed class SystemRuntime
+{
+    public required SolarSystemDefinition Definition { get; init; }
+    public required Vector3 Position { get; init; }
+}
+
+public sealed class ResourceNodeRuntime
+{
+    public required string Id { get; init; }
+    public required string SystemId { get; init; }
+    public required Vector3 Position { get; set; }
+    public required string SourceKind { get; init; }
+    public required string ItemId { get; init; }
+    public string? CelestialId { get; set; }
+    public float OrbitRadius { get; init; }
+    public float OrbitPhase { get; init; }
+    public float OrbitInclination { get; init; }
+    public float OreRemaining { get; set; }
+    public float MaxOre { get; init; }
+    public string LastDeltaSignature { get; set; } = string.Empty;
+}
+
+public sealed class CelestialRuntime
+{
+    public required string Id { get; init; }
+    public required string SystemId { get; init; }
+    public required SpatialNodeKind Kind { get; init; }
+    public required Vector3 Position { get; set; }
+    public float LocalSpaceRadius { get; init; }
+    public string? ParentNodeId { get; set; }
+    public string? OccupyingStructureId { get; set; }
+    public string? OrbitReferenceId { get; set; }
+    public string LastDeltaSignature { get; set; } = string.Empty;
+}
+
+public sealed class ShipSpatialStateRuntime
+{
+    public string SpaceLayer { get; set; } = SpaceLayerKinds.LocalSpace;
+    public required string CurrentSystemId { get; set; }
+    public string? CurrentCelestialId { get; set; }
+    public Vector3? LocalPosition { get; set; }
+    public Vector3? SystemPosition { get; set; }
+    public string MovementRegime { get; set; } = MovementRegimeKinds.LocalFlight;
+    public string? DestinationNodeId { get; set; }
+    public ShipTransitRuntime? Transit { get; set; }
+}
+
+public sealed class ShipTransitRuntime
+{
+    public required string Regime { get; init; }
+    public string? OriginNodeId { get; init; }
+    public string? DestinationNodeId { get; init; }
+    public DateTimeOffset? StartedAtUtc { get; set; }
+    public DateTimeOffset? ArrivalDueAtUtc { get; set; }
+    public float Progress { get; set; }
+}