neon: Round feed icons

packages/neon/lib/src/apps/news/widgets/articles_view.dart

@@ -209,6 +209,7 @@ class _NewsArticlesViewState extends State<NewsArticlesView> {
               child: NewsFeedIcon(
                 feed: feed,
                 size: 16,
+                borderRadius: const BorderRadius.all(Radius.circular(2)),
               ),
             ),
             Flexible(

packages/neon/lib/src/apps/news/widgets/feed_icon.dart

@@ -4,18 +4,23 @@ class NewsFeedIcon extends StatelessWidget {
   const NewsFeedIcon({
     required this.feed,
     this.size = 48,
+    this.borderRadius,
     super.key,
   });
 
   final NewsFeed feed;
   final double size;
+  final BorderRadius? borderRadius;
 
   @override
   Widget build(final BuildContext context) => SizedBox(
         width: size,
         height: size,
-        child: ColoredBox(
+        child: DecoratedBox(
+          decoration: BoxDecoration(
             color: Colors.white,
+            borderRadius: borderRadius,
+          ),
           child: Center(
             child: feed.faviconLink != null && feed.faviconLink != ''
                 ? CachedURLImage(

packages/neon/lib/src/apps/news/widgets/feeds_view.dart

@@ -117,6 +117,7 @@ class NewsFeedsView extends StatelessWidget {
             : Container(),
         leading: NewsFeedIcon(
           feed: feed,
+          borderRadius: const BorderRadius.all(Radius.circular(8)),
         ),
         trailing: Row(
           mainAxisSize: MainAxisSize.min,