fix(combat): match retail live attack feedback

Keep AttackDone control statuses out of chat, preserve dead motion across zero-velocity position updates, render the authored power meter from right to left, and retain the rotatable viewer offset during target tracking.

Co-Authored-By: Codex <codex@openai.com>

tests/AcDream.App.Tests/Rendering/RetailChaseCameraTests.cs

@@ -141,6 +141,33 @@ public class RetailChaseCameraTests
         Assert.Null(RetailChaseCamera.ComputeTrackedHeading(pivot, pivot));
     }
 
+    [Fact]
+    public void DesiredPose_TrackedHeadingWithNoOrbit_PlacesBoomBehindTargetDirection()
+    {
+        var pivot = new Vector3(10f, 20f, 1.5f);
+
+        var (eye, forward) = RetailChaseCamera.ComputeDesiredPose(
+            pivot, Vector3.UnitX, distance: 5f, pitch: 0f, viewerYawOffset: 0f);
+
+        Assert.Equal(new Vector3(5f, 20f, 1.5f), eye);
+        Assert.Equal(Vector3.UnitX, forward);
+    }
+
+    [Fact]
+    public void DesiredPose_TrackedHeadingRetainsViewerOffsetOrbitAndLooksAtPivot()
+    {
+        var pivot = new Vector3(10f, 20f, 1.5f);
+
+        var (eye, forward) = RetailChaseCamera.ComputeDesiredPose(
+            pivot, Vector3.UnitX, distance: 5f, pitch: 0f,
+            viewerYawOffset: MathF.PI / 2f);
+
+        Assert.Equal(10f, eye.X, 5);
+        Assert.Equal(15f, eye.Y, 5);
+        Assert.Equal(1.5f, eye.Z, 5);
+        Assert.Equal(Vector3.Normalize(pivot - eye), forward);
+    }
+
     [Fact]
     public void Basis_HorizontalHeading_IsOrthonormalAndRightHanded()
     {

tests/AcDream.App.Tests/UI/Layout/CombatLayoutConformanceTests.cs

@@ -27,6 +27,7 @@ public sealed class CombatLayoutConformanceTests
         Assert.Equal(0x060074CAu, power.TrackSprite);
         Assert.Equal(0x06001923u, power.ThumbSprite);
         Assert.Equal(0x06001200u, power.ScalarFillSprite);
+        Assert.True(power.ScalarFillFromRight);
 
         var repeat = Assert.IsType<UiButton>(
             layout.FindElement(CombatUiController.RepeatAttacksId));

tests/AcDream.App.Tests/UI/Layout/DatWidgetFactoryTests.cs

@@ -490,6 +490,7 @@ public class DatWidgetFactoryTests
         Assert.Equal(0x06001919u, bar.TrackSprite);
         Assert.Equal(0x06001923u, bar.ThumbSprite);
         Assert.Equal(0x06001200u, bar.ScalarFillSprite);
+        Assert.True(bar.ScalarFillFromRight);
     }
 
     private static ElementInfo TextInfo(params (uint Id, UiPropertyValue Value)[] properties)

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

@@ -102,4 +102,16 @@ public class UiScrollbarTests
 
         Assert.True(bar.OnEvent(new UiEvent(0u, bar, UiEventType.MouseUp, Data1: 45)));
     }
+
+    [Theory]
+    [InlineData(0f,   100f, 0f)]
+    [InlineData(0.5f,  50f, 50f)]
+    [InlineData(1f,     0f, 100f)]
+    public void ScalarFillRect_CombatPower_GrowsRightToLeft(
+        float fill, float expectedX, float expectedWidth)
+    {
+        var (x, width) = UiScrollbar.ScalarFillRect(100f, fill, fromRight: true);
+        Assert.Equal(expectedX, x, 3);
+        Assert.Equal(expectedWidth, width, 3);
+    }
 }