feat(mosstank): add VTank-style automation PoC

tests/AcDream.Runtime.Tests/Gameplay/RuntimeCombatAttackStateTests.cs

@@ -183,6 +183,27 @@ public sealed class RuntimeCombatAttackStateTests
         Assert.Equal(0, cancels);
     }
 
+    [Fact]
+    public void AttackDonePublishesOneCompletionReceiptAndResetClearsIt()
+    {
+        var combat = new CombatState();
+        using var controller = new RuntimeCombatAttackState(
+            combat,
+            canStartAttack: () => true,
+            sendAttack: (_, _) => true);
+
+        combat.OnAttackDone(47u, 0x1234u);
+
+        Assert.Equal(1, controller.CompletionRevision);
+        Assert.Equal(47u, controller.CompletionSequence);
+        Assert.Equal(0x1234u, controller.CompletionWeenieError);
+
+        controller.ResetSession();
+        Assert.Equal(0, controller.CompletionRevision);
+        Assert.Equal(0u, controller.CompletionSequence);
+        Assert.Equal(0u, controller.CompletionWeenieError);
+    }
+
     [Fact]
     public void StartAttackRequest_PreparesPlayerMovementBeforePowerBuild()
     {