shared playlists: a follow with news says so through a toast, and a follower's rows keep the owner's catalog ids

src/App.svelte

@@ -27,6 +27,7 @@
     import ResolverToast from "./components/ResolverToast.svelte";
     import UploadToast from "./components/UploadToast.svelte";
     import ProposalToast from "./components/ProposalToast.svelte";
+    import FollowNewsToast from "./components/FollowNewsToast.svelte";
     import SetlistScanChip from "./components/SetlistScanChip.svelte";
     import {
         ui,
@@ -186,6 +187,7 @@
     <ResolverToast />
     <UploadToast />
     <ProposalToast />
+    <FollowNewsToast />
     <SetlistScanChip />
     <PreviewOverlay />
     <LyricsSyncEditor />