style: apply prettier formatting to fix format:check

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/components/messageStream/MessageStream.tsx

@@ -71,8 +71,9 @@ export function MessageStream({ scope }: MessageStreamProps) {
   // When arriving with a `#post-<id>` hash (e.g. from a recommended card),
   // scroll to that bubble — loading more pages until it shows up — then give
   // it a brief highlight so the user can see where they landed.
-  const targetPostId =
-    hash.startsWith("#post-") ? hash.slice("#post-".length) : "";
+  const targetPostId = hash.startsWith("#post-")
+    ? hash.slice("#post-".length)
+    : "";
   const handledTargetRef = useRef<string>("");
 
   useEffect(() => {