fix(app): reduce session history page size

packages/app/e2e/regression/session-timeline-history-root.spec.ts

@@ -18,7 +18,7 @@ import { installSseTransport } from "../utils/sse-transport"
 import { expectSessionTitle } from "../utils/waits"
 
 const initialPageSize = 20
-const historyPageSize = 200
+const historyPageSize = 50
 const assistants = Array.from({ length: initialPageSize + 1 }, (_, index) =>
   assistantMessage([textPart(`prt_history_root_${index}`, `Assistant response ${index}`)], {
     id: `msg_${String(index + 1001).padStart(4, "0")}_history_root_assistant`,

packages/app/src/context/server-session.ts

@@ -29,7 +29,7 @@ const cmp = (a: string, b: string) => (a < b ? -1 : a > b ? 1 : 0)
 const cmpMessage = (a: Message, b: Message) => a.time.created - b.time.created || cmp(a.id, b.id)
 const SKIP_PARTS = new Set(["patch", "step-start", "step-finish"])
 const initialMessagePageSize = 20
-const historyMessagePageSize = 200
+const historyMessagePageSize = 50
 const sessionInfoLimit = 2_048
 const emptyIDs: ReadonlySet<string> = new Set()
 

packages/app/src/pages/layout.tsx

@@ -634,7 +634,7 @@ export default function LegacyLayout(props: ParentProps) {
     running: number
   }
 
-  const prefetchChunk = 200
+  const prefetchChunk = 50
   const prefetchConcurrency = 2
   const prefetchPendingLimit = 10
   const span = 4