fix(interaction): restore retail loot placement and world-drop projection

tests/AcDream.App.Tests/Physics/LiveEntityInboundAuthorityGateTests.cs

@@ -159,6 +159,8 @@ public sealed class LiveEntityInboundAuthorityGateTests
             out AcceptedPositionNetworkUpdate accepted));
         Assert.Equal(PositionTimestampDisposition.Apply, accepted.TimestampDisposition);
         Assert.Equal((ulong)2, accepted.PositionAuthorityVersion);
+        Assert.True(runtime.TryGetCanonical(Guid, out RuntimeEntityRecord canonical));
+        Assert.Same(canonical, accepted.Canonical);
         Assert.Equal(1, publishCount);
 
         gate.ResetSessionState();
@@ -197,6 +199,33 @@ public sealed class LiveEntityInboundAuthorityGateTests
             out _));
     }
 
+    [Fact]
+    public void Position_CanonicalInventoryObjectIsAcceptedBeforeProjectionExists()
+    {
+        LiveEntityRuntime runtime = Runtime();
+        LiveEntityRegistrationResult registration =
+            runtime.RegisterLiveEntity(Spawn(Guid, instance: 5, position: 1));
+        Assert.NotNull(registration.Canonical);
+        Assert.False(runtime.TryGetRecord(Guid, out _));
+        int publishCount = 0;
+        var gate = new LiveEntityInboundAuthorityGate(
+            runtime,
+            (_, _) => publishCount++);
+
+        Assert.True(gate.TryAcceptPosition(
+            Position(Guid, 5, 2, 0x01010002u),
+            localPlayerGuid: 0u,
+            forcePositionRotation: null,
+            currentLocalVelocity: null,
+            payloadIsValid: true,
+            out AcceptedPositionNetworkUpdate accepted));
+
+        Assert.Same(registration.Canonical, accepted.Canonical);
+        Assert.Equal((ulong)2, accepted.PositionAuthorityVersion);
+        Assert.Equal(1, publishCount);
+        Assert.False(runtime.TryGetRecord(Guid, out _));
+    }
+
     [Fact]
     public void Vector_NewerSameIncarnationPacketInvalidatesCapturedAuthority()
     {
@@ -308,10 +337,10 @@ public sealed class LiveEntityInboundAuthorityGateTests
             payloadIsValid: true,
             out AcceptedPositionNetworkUpdate accepted));
         Assert.True(runtime.IsCurrentPositionAuthority(
-            accepted.Record,
+            accepted.Canonical,
             accepted.PositionAuthorityVersion));
         Assert.False(runtime.IsCurrentVelocityAuthority(
-            accepted.Record,
+            accepted.Canonical,
             accepted.VelocityAuthorityVersion));
     }