Fix profile fetch architecture: batch kind-0 queries, restore NDK pooling

src/components/feed/Feed.tsx

@@ -4,7 +4,7 @@ import { useUserStore } from "../../stores/user";
 import { useMuteStore } from "../../stores/mute";
 import { useUIStore } from "../../stores/ui";
 import { useWoTStore } from "../../stores/wot";
-import { fetchFollowFeed, getNDK, ensureConnected } from "../../lib/nostr";
+import { fetchFollowFeed, getNDK, ensureConnected, batchFetchProfileAges } from "../../lib/nostr";
 import { diagWrapFetch, logDiag } from "../../lib/feedDiagnostics";
 import { detectScript, getEventLanguageTag, FILTER_SCRIPTS } from "../../lib/language";
 import { NoteCard } from "./NoteCard";
@@ -63,7 +63,10 @@ export function Feed() {
   useEffect(() => {
     // Show cached notes immediately, then fetch fresh ones once connected
     loadCachedFeed();
-    connect().then(() => loadFeed());
+    connect().then(() => loadFeed().then(() => {
+      const pubkeys = [...new Set(useFeedStore.getState().notes.map((e) => e.pubkey))];
+      batchFetchProfileAges(pubkeys);
+    }));
   }, []);
 
 

src/components/feed/NoteCard.tsx

@@ -6,7 +6,7 @@ import { useUserStore } from "../../stores/user";
 import { useMuteStore } from "../../stores/mute";
 import { useUIStore } from "../../stores/ui";
 import { timeAgo, shortenPubkey } from "../../lib/utils";
-import { getNDK, fetchNoteById, ensureConnected } from "../../lib/nostr";
+import { getNDK, fetchNoteById, ensureConnected, getProfileAge } from "../../lib/nostr";
 import { getParentEventId } from "../../lib/threadTree";
 import { NoteContent } from "./NoteContent";
 import { NoteActions, LoggedOutStats } from "./NoteActions";
@@ -34,7 +34,7 @@ export const NoteCard = memo(function NoteCard({ event, focused, onReplyInThread
   const nip05 = typeof profile?.nip05 === "string" ? profile.nip05 : null;
   const verified = useNip05Verified(event.pubkey, nip05);
   const time = event.created_at ? timeAgo(event.created_at) : "";
-  const profileCreatedAt = typeof profile?._createdAt === "number" ? profile._createdAt : null;
+  const profileCreatedAt = getProfileAge(event.pubkey);
   const isNewAccount = profileCreatedAt !== null && (Date.now() / 1000 - profileCreatedAt) < 60 * 24 * 3600;
 
   const loggedIn = useUserStore((s) => s.loggedIn);

src/components/thread/ThreadView.tsx

@@ -4,7 +4,7 @@ import { useAutoResize } from "../../hooks/useAutoResize";
 import { useUIStore } from "../../stores/ui";
 import { useUserStore } from "../../stores/user";
 import { useMuteStore } from "../../stores/mute";
-import { fetchNoteById, fetchThreadEvents, fetchAncestors, publishReply, getNDK, ensureConnected } from "../../lib/nostr";
+import { fetchNoteById, fetchThreadEvents, fetchAncestors, publishReply, getNDK, ensureConnected, batchFetchProfileAges } from "../../lib/nostr";
 import { buildThreadTree, getRootEventId } from "../../lib/threadTree";
 import type { ThreadNode } from "../../lib/threadTree";
 import { debug } from "../../lib/debug";
@@ -99,6 +99,7 @@ export function ThreadView() {
 
         const built = buildThreadTree(root.id, allEvents);
         setTree(built);
+        batchFetchProfileAges([...new Set(allEvents.map((e) => e.pubkey))]);
       } catch (err) {
         debug.error("Failed to load thread:", err);
         if (!cancelled) setLoadError(`Failed to load: ${err}`);