feat: simplified local-space and celestial, removed bubbles

apps/backend/Simulation/Model/SimulationKinds.cs

@@ -6,8 +6,6 @@ public enum SpatialNodeKind
   Planet,
   Moon,
   LagrangePoint,
-  Station,
-  ResourceSite,
 }
 
 public enum WorkStatus
@@ -112,7 +110,7 @@ public static class ShipTaskKinds
   public const string BuildConstructionSite = "build-construction-site";
   public const string EscortTarget = "escort-target";
   public const string AttackTarget = "attack-target";
-  public const string DefendBubble = "defend-bubble";
+  public const string DefendCelestial = "defend-celestial";
   public const string Retreat = "retreat";
   public const string HoldPosition = "hold-position";
 }
@@ -167,8 +165,6 @@ public static class SimulationEnumMappings
     SpatialNodeKind.Planet => "planet",
     SpatialNodeKind.Moon => "moon",
     SpatialNodeKind.LagrangePoint => "lagrange-point",
-    SpatialNodeKind.Station => "station",
-    SpatialNodeKind.ResourceSite => "resource-site",
     _ => throw new ArgumentOutOfRangeException(nameof(kind), kind, null),
   };