improvement on gm windows, ai

apps/backend/Universe/Scenario/SpatialBuilder.cs

@@ -224,6 +224,23 @@ internal sealed class SpatialBuilder
 
   private static CelestialRuntime? ResolveResourceNodeAnchor(SystemSpatialGraph graph, ResourceNodeDefinition definition)
   {
+    if (!string.IsNullOrWhiteSpace(definition.AnchorReference))
+    {
+      var anchorId = definition.AnchorReference.ToLowerInvariant() switch
+      {
+        var reference when reference.StartsWith("star-", StringComparison.Ordinal)
+          => $"node-{graph.SystemId}-{reference}",
+        var reference when reference.StartsWith("planet-", StringComparison.Ordinal)
+          => $"node-{graph.SystemId}-{reference}",
+        _ => null,
+      };
+
+      if (anchorId is not null)
+      {
+        return graph.Celestials.FirstOrDefault(c => string.Equals(c.Id, anchorId, StringComparison.Ordinal));
+      }
+    }
+
     if (definition.AnchorPlanetIndex is not int planetIndex || planetIndex < 0)
     {
       return null;