refactor(app): tighten feature boundaries

src/lib/auth/auth_session.ts

@@ -0,0 +1,8 @@
+"use client";
+
+import { AuthStorage } from "@/data/storage/auth/auth_storage";
+
+export async function hasBusinessLoginToken(): Promise<boolean> {
+  const result = await AuthStorage.getInstance().getLoginToken();
+  return result.success && Boolean(result.data);
+}