Improve page load times and rendering

app/(app)/layout.tsx

@@ -1,8 +1,20 @@
 import type { ReactNode } from "react";
+import ConditionalNavigation from "../components/navigation/ConditionalNavigation";
+
+// Reads `cr_session` via Server Components on every navigation so the header
+// matches the HttpOnly cookie on the first HTML response (no "Log in" flash
+// before `/api/auth/session`). Scoped here instead of the root layout so
+// `(marketing)` can render statically.
+export const dynamic = "force-dynamic";
 
 // Signed-in product surfaces (`/create/*`, `/login`) run without the marketing
 // footer. `/profile` adds it via `profile/layout.tsx`. Per-route chrome (e.g.
 // CreateFlow) is composed in nested layouts.
 export default function AppLayout({ children }: { children: ReactNode }) {
-  return <main className="flex-1">{children}</main>;
+  return (
+    <>
+      <ConditionalNavigation />
+      <main className="flex-1">{children}</main>
+    </>
+  );
 }