fix(ui): retain compound spellbook button children

Render Type-1 state-propagating child media as the button face so spellbook school and level filters show their authored green Highlight indicator and keep labels at the retail left inset.

Lift captions, fonts, and colors from authored text children for framed buttons such as Delete, preventing centered filter labels from being covered by the overlapping delete frame.

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

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

@@ -57,6 +57,39 @@ public sealed class SpellbookWindowControllerTests
         Assert.Empty(closed);
     }
 
+    [Fact]
+    public void RetailFixture_BindsFilterIndicatorChildren_AndDeleteCaptionChild()
+    {
+        ImportedLayout layout = LayoutImporter.Build(
+            FixtureLoader.LoadSpellbookInfos(),
+            _ => (0u, 0, 0),
+            datFont: null,
+            stringResolve: value => value.StringId == 164868556u ? "Delete" : "Filter");
+
+        UiButton creature = Assert.IsType<UiButton>(layout.FindElement(0x10000298u));
+        Assert.Equal((0f, 1f, 13f, 13f),
+            (creature.FaceLeft, creature.FaceTop, creature.FaceWidth, creature.FaceHeight));
+        Assert.Equal(UiButton.LabelAlignment.Left, creature.LabelAlign);
+        Assert.Equal(17f, creature.LabelOffsetX);
+        Assert.Equal("Filter", creature.Label);
+        Assert.True(creature.ToggleBehavior);
+
+        creature.Selected = true;
+        Assert.Equal("Highlight", creature.ActiveState);
+        Assert.Equal(UiButtonStateMachine.Highlight, creature.ActiveRetailStateId);
+
+        UiButton levelSix = Assert.IsType<UiButton>(layout.FindElement(0x100002A1u));
+        Assert.Equal(UiButton.LabelAlignment.Left, levelSix.LabelAlign);
+        Assert.Equal(17f, levelSix.LabelOffsetX);
+
+        UiButton delete = Assert.IsType<UiButton>(
+            layout.FindElement(SpellbookWindowController.DeleteButtonId));
+        Assert.Equal("Delete", delete.Label);
+        Assert.Equal(UiButton.LabelAlignment.Center, delete.LabelAlign);
+        Assert.Equal((187f, 61f, 100f, 32f),
+            (delete.Left, delete.Top, delete.FaceWidth, delete.FaceHeight));
+    }
+
     [Fact]
     public void LearnedSpells_AreAuthoredRows_InDisplayOrder_WithSelectionAndDragPayload()
     {