le8i2digy: Add a refresh button to the Home feed header and singularize one comment

src/dev/FeedPreview.tsx

@@ -29,6 +29,7 @@ export function FeedPreview() {
   // Fixture switches for the new-posts pill and the loading-more skeleton.
   const [newCount, setNewCount] = useState(0);
   const [loadingMore, setLoadingMore] = useState(false);
+  const [refreshing, setRefreshing] = useState(false);
   const list = useRef<HTMLDivElement | null>(null);
 
   // The comments calls answer from the fixtures; the preview never reaches the network.
@@ -99,6 +100,15 @@ export function FeedPreview() {
             setNewCount(0);
             list.current?.scrollTo({ top: 0, behavior: "smooth" });
           }}
+          refreshing={refreshing}
+          onRefresh={() => {
+            list.current?.scrollTo({ top: 0, behavior: "smooth" });
+            setRefreshing(true);
+            window.setTimeout(() => {
+              setPosts(toCardPosts(FIXTURE_FEED_ITEMS));
+              setRefreshing(false);
+            }, 600);
+          }}
           onToggleLike={toggleLike}
           feedUserId={FIXTURE_PERSON.feedUserId}
           onDelete={(post) => setPosts((cur) => cur.filter((p) => p.key !== post.key))}