diff --git a/src/types/index.ts b/src/types/index.ts
index 2a52b01..d307918 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -860,3 +860,18 @@ export interface InboxClaimRow {
     totalLines: number;
   } | null;
 }
+
+// ---------------------------------------------------------------------------
+// Auth (admin/user/viewer). Mirrors `users.to_public()` on the backend
+// (backend/src/cyclone/auth/users.py). Role is the triple ("admin" |
+// "user" | "viewer"); `disabledAt` is non-null when the account has been
+// disabled by an admin. `createdAt` mirrors the original DB column.
+// ---------------------------------------------------------------------------
+
+export interface User {
+  id: number;
+  username: string;
+  role: "admin" | "user" | "viewer";
+  createdAt: string | null;
+  disabledAt?: string | null;
+}