chore: establish learning module baseline

OpenMAIC/app/api/access-code/status/route.ts

@@ -0,0 +1,18 @@
+import { cookies } from 'next/headers';
+import { apiSuccess } from '@/lib/server/api-response';
+import { verifyAccessToken } from '@/lib/server/access-token';
+import { ACCESS_CODE_COOKIE_NAME } from '@/lib/server/access-token-policy';
+
+export async function GET() {
+  const accessCode = process.env.ACCESS_CODE;
+  const enabled = !!accessCode;
+
+  let authenticated = false;
+  if (enabled) {
+    const cookieStore = await cookies();
+    const token = cookieStore.get(ACCESS_CODE_COOKIE_NAME)?.value;
+    authenticated = !!token && verifyAccessToken(token, accessCode);
+  }
+
+  return apiSuccess({ enabled, authenticated });
+}