refactor(features, widgets): update ThemeManager, FontSampler, FontSearch, and SampleList

src/widgets/index.ts

@@ -1,5 +1,15 @@
-export { ComparisonSlider } from './ComparisonSlider';
-export { FontSearch } from './FontSearch';
+/**
+ * Widgets layer
+ *
+ * Composed UI blocks that combine features and entities into complete
+ * user-facing components.
+ */
+
+export { ComparisonView } from './ComparisonView';
+export {
+    FontSearch,
+    FontSearchSection,
+} from './FontSearch';
 export {
     SampleList,
     SampleListSection,