Contract: pass approval option warnings, omit threadId on host pushes

gateway/src/notify.ts

@@ -79,7 +79,7 @@ export class Notifier {
       title: label,
       body,
       category: "host",
-      data: { hostId, threadId: "" },
+      data: { hostId },
       collapseId: `host:${hostId}`,
     }).catch(() => {});
   }