fix(ui): preserve cropped chat and button faces

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

@@ -129,4 +129,50 @@ public sealed class UiLayoutPolicyTests
         Assert.Equal(400f, element.Width);
         Assert.Equal(200f, element.Height);
     }
+
+    [Fact]
+    public void ResetAnchorCapture_RebasesImportedPolicyAfterControllerResize()
+    {
+        var parent = new UiPanel { Width = 490, Height = 17 };
+        var child = new UiPanel
+        {
+            Left = 0,
+            Top = 0,
+            Width = 46,
+            Height = 17,
+            LayoutPolicy = new UiLayoutPolicy(
+                1, 1, 2, 1,
+                UiPixelRect.FromPositionAndSize(0, 0, 46, 17),
+                UiPixelRect.FromPositionAndSize(0, 0, 490, 17)),
+        };
+        parent.AddChild(child);
+        child.Width = 72;
+
+        child.ResetAnchorCapture();
+        child.ApplyAnchor(parent.Width, parent.Height);
+
+        Assert.Equal(72f, child.Width);
+    }
+
+    [Fact]
+    public void RebaseChildLayoutBaselines_CroppedChatRegionThenGrowsWithFrame()
+    {
+        var root = new UiPanel { Width = 490, Height = 100 };
+        var transcriptPanel = new UiPanel
+        {
+            Width = 490,
+            Height = 83,
+            LayoutPolicy = new UiLayoutPolicy(
+                1, 1, 1, 1,
+                UiPixelRect.FromPositionAndSize(0, 0, 490, 83),
+                UiPixelRect.FromPositionAndSize(0, 0, 800, 100)),
+        };
+        root.AddChild(transcriptPanel);
+
+        root.RebaseChildLayoutBaselines();
+        root.Width = 615;
+        transcriptPanel.ApplyAnchor(root.Width, root.Height);
+
+        Assert.Equal(615f, transcriptPanel.Width);
+    }
 }