Magic-link sign in UI and APIs

lib/server/navAuth.ts

@@ -0,0 +1,21 @@
+import { unstable_noStore as noStore } from "next/cache";
+import { isDatabaseConfigured } from "./env";
+import { getSessionUser } from "./session";
+
+/**
+ * Whether the current request has a valid session, for marketing shell SSR.
+ * Aligns with GET /api/auth/session: no DB → treat as signed out; errors → signed out.
+ *
+ * `noStore()` avoids any static/prerender reuse where HTML was built without the request cookie
+ * but the client still receives `initialSignedIn: true` (hydration mismatch on Log in vs Profile).
+ */
+export async function getNavAuthSignedIn(): Promise<boolean> {
+  noStore();
+  if (!isDatabaseConfigured()) return false;
+  try {
+    const user = await getSessionUser();
+    return user != null;
+  } catch {
+    return false;
+  }
+}