fix(interaction): bind selection to live incarnations

Carry local WorldEntity identity through render hits, lighting pulses, and deferred movement actions so GUID reuse cannot target a replacement. Reset all session-owned selection and ItemHolder state and prevent combat auto-target during teardown.

tests/AcDream.App.Tests/Combat/CombatTargetControllerTests.cs

@@ -79,4 +79,21 @@ public sealed class CombatTargetControllerTests
 
         Assert.Equal(0x50000002u, selection.SelectedObjectId);
     }
+
+    [Fact]
+    public void SessionReset_DoesNotAcquireTargetFromDepartingWorld()
+    {
+        var combat = new CombatState();
+        combat.SetCombatMode(CombatMode.Missile);
+        var selection = new SelectionState();
+        selection.Select(0x50000002u, SelectionChangeSource.World);
+        int calls = 0;
+        using var controller = new CombatTargetController(
+            combat, selection, () => true, () => { calls++; return null; });
+
+        selection.Reset();
+
+        Assert.Equal(0, calls);
+        Assert.Null(selection.SelectedObjectId);
+    }
 }