refactor(net): converge live session state reset

tests/AcDream.App.Tests/UI/InteractionStateTests.cs

@@ -29,4 +29,31 @@ public sealed class InteractionStateTests
         Assert.Throws<ArgumentOutOfRangeException>(() => state.EnterUseItemOnTarget(0));
         Assert.Equal(InteractionMode.None, state.Current);
     }
+
+    [Fact]
+    public void ResetSession_RetryRepublishesAndOneObserverCannotStarveAnother()
+    {
+        var state = new InteractionState();
+        state.EnterExamine();
+        bool fail = true;
+        int delivered = 0;
+        state.Changed += _ =>
+        {
+            if (fail)
+            {
+                fail = false;
+                throw new InvalidOperationException("transient");
+            }
+        };
+        state.Changed += transition =>
+        {
+            Assert.Equal(InteractionMode.None, transition.Current);
+            delivered++;
+        };
+
+        Assert.Throws<AggregateException>(state.ResetSession);
+        Assert.Equal(1, delivered);
+        state.ResetSession();
+        Assert.Equal(2, delivered);
+    }
 }