chore: use bigger page size and render msg count

app/constant.ts

@@ -110,5 +110,5 @@ export const DEFAULT_MODELS = [
   },
 ] as const;
 
-export const CHAT_PAGE_SIZE = 10;
-export const MAX_RENDER_MSG_COUNT = 20;
+export const CHAT_PAGE_SIZE = 30;
+export const MAX_RENDER_MSG_COUNT = 60;