refactor: remove redundant pending check from working memo (#23929)

packages/app/src/pages/session/message-timeline.tsx

@@ -259,7 +259,7 @@ export function MessageTimeline(props: {
     if (!id) return idle
     return sync.data.session_status[id] ?? idle
   })
-  const working = createMemo(() => !!pending() || sessionStatus().type !== "idle")
+  const working = createMemo(() => sessionStatus().type !== "idle")
   const tint = createMemo(() => messageAgentColor(sessionMessages(), sync.data.agent))
 
   const [timeoutDone, setTimeoutDone] = createSignal(true)