diff --git a/frontend/src/components/ChannelPage.tsx b/frontend/src/components/ChannelPage.tsx
index 2c81407..08e259b 100644
--- a/frontend/src/components/ChannelPage.tsx
+++ b/frontend/src/components/ChannelPage.tsx
@@ -6,6 +6,7 @@ import Avatar from "./Avatar";
 import Feed from "./Feed";
 import { useConfirm } from "./ConfirmProvider";
 import { notify } from "../lib/notifications";
+import { notifyYouTubeActionError } from "../lib/youtubeErrors";
 import { api, type FeedFilters, type Me } from "../lib/api";
 import { channelYouTubeUrl, formatViews } from "../lib/format";
 
@@ -89,8 +90,14 @@ export default function ChannelPage({
       qc.invalidateQueries({ queryKey: ["channel", channelId] });
       qc.invalidateQueries({ queryKey: ["feed"] });
       qc.invalidateQueries({ queryKey: ["channels"] });
+      // Match ChannelDiscovery: the channel leaves discovery and the manager's stats move.
+      qc.invalidateQueries({ queryKey: ["my-status"] });
+      qc.invalidateQueries({ queryKey: ["discovered-channels"] });
       notify({ level: "info", message: t("channel.subscribed", { name: ch?.title ?? "" }) });
     },
+    // A 403 (missing write scope) otherwise fails silently on the channel page (no wizard handle
+    // here, so no Connect button — but the user at least sees why it didn't work).
+    onError: (err) => notifyYouTubeActionError(err, t("channels.discovery.subscribeFailed")),
   });
   const unsubscribe = useMutation({
     mutationFn: () => api.unsubscribeChannel(channelId),