feat(mosstank): add VTank-style automation PoC

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

@@ -96,6 +96,24 @@ public sealed class RuntimeCombatModeStateTests
         Assert.Equal(["intent", "equipment", "send:Melee"], operations.Trace);
     }
 
+    [Fact]
+    public void ExplicitRequestSendsChosenPluginModeWithoutEquipmentGuessing()
+    {
+        var combat = new CombatState();
+        var operations = new Operations();
+        combat.CombatModeChanged += mode =>
+            operations.Trace.Add($"state:{mode}");
+        var state = new RuntimeCombatModeState(combat, operations);
+
+        RuntimeCombatModeRequestResult result = state.Request(CombatMode.Magic);
+
+        Assert.Equal(RuntimeCombatModeRequestStatus.Sent, result.Status);
+        Assert.Equal(CombatMode.Magic, result.Mode);
+        Assert.Equal(
+            ["intent", "send:Magic", "state:Magic"],
+            operations.Trace);
+    }
+
     private sealed class Operations : IRuntimeCombatModeOperations
     {
         public bool IsInWorld { get; init; } = true;