fix(app): stale show (#16236)

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

@@ -1,4 +1,4 @@
-import { For, createEffect, createMemo, on, onCleanup, Show, startTransition, Index, type JSX } from "solid-js"
+import { For, createEffect, createMemo, on, onCleanup, Show, Index, type JSX } from "solid-js"
 import { createStore, produce } from "solid-js/store"
 import { useNavigate, useParams } from "@solidjs/router"
 import { Button } from "@opencode-ai/ui/button"
@@ -160,7 +160,7 @@ function createTimelineStaging(input: TimelineStageInput) {
           }
           const currentTotal = input.messages().length
           count = Math.min(currentTotal, count + input.config.batch)
-          startTransition(() => setState("count", count))
+          setState("count", count)
           if (count >= currentTotal) {
             setState({ completedSession: sessionKey, activeSession: "" })
             frame = undefined