Add Quote / Repost (NIP-18, roadmap #6)

- publishRepost: kind 6 event with stringified original event as content
  and ["e", id, "", "mention"] + ["p", pubkey] tags
- publishQuote: kind 1 note with user's text + appended nostr:nevent1...
  reference and ["q", id] + ["p", pubkey] tags
- QuoteModal: compose modal with live quoted-note preview (avatar, name,
  truncated content); Ctrl+Enter to post, Escape to close
- NoteCard: "repost" (one-click, shows "reposted ✓") and "quote" (opens
  QuoteModal) added to the actions row alongside reply/like/zap

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/lib/nostr/client.ts

@@ -1,4 +1,4 @@
-import NDK, { NDKEvent, NDKFilter, NDKKind, NDKRelay, NDKSubscriptionCacheUsage } from "@nostr-dev-kit/ndk";
+import NDK, { NDKEvent, NDKFilter, NDKKind, NDKRelay, NDKSubscriptionCacheUsage, nip19 } from "@nostr-dev-kit/ndk";
 
 const RELAY_STORAGE_KEY = "wrystr_relays";
 
@@ -146,6 +146,37 @@ export async function publishArticle(opts: {
   await event.publish();
 }
 
+export async function publishRepost(event: NDKEvent): Promise<void> {
+  const instance = getNDK();
+  if (!instance.signer) throw new Error("Not logged in");
+
+  const repost = new NDKEvent(instance);
+  repost.kind = NDKKind.Repost; // kind 6
+  repost.content = JSON.stringify(event.rawEvent());
+  repost.tags = [
+    ["e", event.id!, "", "mention"],
+    ["p", event.pubkey],
+  ];
+  await repost.publish();
+}
+
+export async function publishQuote(content: string, quotedEvent: NDKEvent): Promise<void> {
+  const instance = getNDK();
+  if (!instance.signer) throw new Error("Not logged in");
+
+  const nevent = nip19.neventEncode({ id: quotedEvent.id!, author: quotedEvent.pubkey });
+  const fullContent = content.trim() + "\n\nnostr:" + nevent;
+
+  const note = new NDKEvent(instance);
+  note.kind = NDKKind.Text;
+  note.content = fullContent;
+  note.tags = [
+    ["q", quotedEvent.id!, ""],
+    ["p", quotedEvent.pubkey],
+  ];
+  await note.publish();
+}
+
 export async function publishReaction(eventId: string, eventPubkey: string, reaction = "+"): Promise<void> {
   const instance = getNDK();
   if (!instance.signer) throw new Error("Not logged in");

src/lib/nostr/index.ts

@@ -1 +1 @@
-export { getNDK, connectToRelays, fetchGlobalFeed, fetchFollowFeed, fetchReplies, publishNote, publishArticle, publishProfile, publishReaction, publishReply, publishContactList, fetchReactionCount, fetchUserNotes, fetchProfile, fetchMuteList, publishMuteList, getStoredRelayUrls, addRelay, removeRelay, searchNotes, searchUsers } from "./client";
+export { getNDK, connectToRelays, fetchGlobalFeed, fetchFollowFeed, fetchReplies, publishNote, publishArticle, publishProfile, publishReaction, publishRepost, publishQuote, publishReply, publishContactList, fetchReactionCount, fetchUserNotes, fetchProfile, fetchMuteList, publishMuteList, getStoredRelayUrls, addRelay, removeRelay, searchNotes, searchUsers } from "./client";