fix: auto-publish approved blog submissions on approval

Approved user submissions now import into the blog automatically, with a
backfill script for existing approvals and a WebSocket polyfill so backend
Nostr relay queries work on Node 20.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/app/admin/submissions/page.tsx

@@ -40,6 +40,7 @@ export default function AdminSubmissionsPage() {
   const [reviewingId, setReviewingId] = useState<string | null>(null);
   const [reviewNote, setReviewNote] = useState("");
   const [processing, setProcessing] = useState(false);
+  const [success, setSuccess] = useState("");
 
   const loadSubmissions = async () => {
     try {
@@ -61,10 +62,17 @@ export default function AdminSubmissionsPage() {
   const handleReview = async (id: string, status: "APPROVED" | "REJECTED") => {
     setProcessing(true);
     setError("");
+    setSuccess("");
     try {
-      await api.reviewSubmission(id, { status, reviewNote: reviewNote.trim() || undefined });
+      const res = await api.reviewSubmission(id, {
+        status,
+        reviewNote: reviewNote.trim() || undefined,
+      });
       setReviewingId(null);
       setReviewNote("");
+      if (status === "APPROVED" && res?.post) {
+        setSuccess(`Approved and published "${res.post.title}" to the blog.`);
+      }
       await loadSubmissions();
     } catch (err: any) {
       setError(err.message);
@@ -87,6 +95,7 @@ export default function AdminSubmissionsPage() {
       </div>
 
       {error && <p className="text-error text-sm">{error}</p>}
+      {success && <p className="text-primary text-sm">{success}</p>}
 
       <div className="flex gap-2">
         {TABS.map((tab) => (