fix(ui): port exact selected health policy

Replace the toolbar's PWD-bit approximation with retail ObjectIsAttackable composed with the exact player and pet short-circuits. Carry second-header PetOwner through CreateObject, session, and ClientObject state so self, pet, and Free-PK cases match retail while friendly NPCs and attackable non-creatures remain name-only.

Co-Authored-By: Codex <codex@openai.com>

tests/AcDream.Core.Net.Tests/WorldSessionRadarTests.cs

@@ -39,6 +39,17 @@ public sealed class WorldSessionRadarTests
         Assert.Equal("Pyreal Scarabs", spawn.PluralName);
     }
 
+    [Fact]
+    public void ToEntitySpawn_PreservesPetOwner()
+    {
+        var spawn = WorldSession.ToEntitySpawn(MinimalParsed() with
+        {
+            PetOwnerId = 0x50000002u,
+        });
+
+        Assert.Equal(0x50000002u, spawn.PetOwnerId);
+    }
+
     private static CreateObject.Parsed MinimalParsed() => new(
         Guid: 0x50000001u,
         Position: null,