style(desktop): satisfy lint across PR-touched files

apps/desktop/src/app/chat/composer/index.tsx

@@ -196,6 +196,7 @@ export function ChatBar({
   const [restingPlaceholder, setRestingPlaceholder] = useState(() =>
     pickPlaceholder(sessionId ? FOLLOW_UP_PLACEHOLDERS : NEW_SESSION_PLACEHOLDERS)
   )
+
   const prevSessionIdRef = useRef(sessionId)
 
   useEffect(() => {

apps/desktop/src/app/chat/index.tsx

@@ -98,9 +98,12 @@ function ChatHeader({
 }: ChatHeaderProps) {
   const sessions = useStore($sessions)
   const pinnedSessionIds = useStore($pinnedSessionIds)
+
   const activeStoredSession =
     sessions.find(session => session.id === selectedSessionId || session._lineage_root_id === selectedSessionId) || null
+
   const title = activeStoredSession ? sessionTitle(activeStoredSession) : 'New session'
+
   // Pins live on the durable lineage-root id, but selectedSessionId is the live
   // (tip) id — resolve through the loaded row so the menu reflects the pin
   // state after auto-compression rotates the id.