fix(app): restore desktop prod legacy flows (#28919)

packages/app/src/pages/session.tsx

@@ -59,6 +59,7 @@ import { SessionSidePanel } from "@/pages/session/session-side-panel"
 import { TerminalPanel } from "@/pages/session/terminal-panel"
 import { useSessionCommands } from "@/pages/session/use-session-commands"
 import { useSessionHashScroll } from "@/pages/session/use-session-hash-scroll"
+import { shouldUseV2NewSessionPage } from "@/pages/session/new-session-layout"
 import { Identifier } from "@/utils/id"
 import { diffs as list } from "@/utils/diffs"
 import { Persist, persisted } from "@/utils/persist"
@@ -263,7 +264,8 @@ export default function Page() {
 
   const isDesktop = createMediaQuery("(min-width: 768px)")
   const size = createSizing()
-  const isV2NewSessionPage = () => import.meta.env.VITE_OPENCODE_CHANNEL === "prod" || !params.id
+  const isV2NewSessionPage = () =>
+    shouldUseV2NewSessionPage({ channel: import.meta.env.VITE_OPENCODE_CHANNEL, sessionID: params.id })
   const desktopReviewOpen = createMemo(() => isDesktop() && view().reviewPanel.opened() && !isV2NewSessionPage())
   const desktopFileTreeOpen = createMemo(() => isDesktop() && layout.fileTree.opened() && !isV2NewSessionPage())
   const desktopSidePanelOpen = createMemo(() => desktopReviewOpen() || desktopFileTreeOpen())