Add mute/ignore user + anti-spam (roadmap #5, NIP-51)

- fetchMuteList / publishMuteList in nostr client (kind 10000)
- mute store: mutedPubkeys persisted to localStorage + synced to relay;
  mute/unmute publish kind 10000 best-effort; fetchMuteList merges relay
  list with local mutes on login
- fetchMuteList called after every login (nsec + pubkey)
- Feed: muted pubkeys filtered from both Global and Following tabs
- NoteCard: ⋯ context menu (appears on hover, hidden for own notes)
  with mute / unmute action; backdrop click closes menu
- ProfileView: mute / unmute button in the action row (next to follow)
- SettingsView: MuteSection lists muted accounts with name + avatar;
  hover to reveal unmute button; hidden when mute list is empty

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

src/components/feed/Feed.tsx

@@ -1,6 +1,7 @@
 import { useEffect, useState } from "react";
 import { useFeedStore } from "../../stores/feed";
 import { useUserStore } from "../../stores/user";
+import { useMuteStore } from "../../stores/mute";
 import { fetchFollowFeed, getNDK } from "../../lib/nostr";
 import { NoteCard } from "./NoteCard";
 import { ComposeBox } from "./ComposeBox";
@@ -11,6 +12,7 @@ type FeedTab = "global" | "following";
 export function Feed() {
   const { notes, loading, connected, error, connect, loadCachedFeed, loadFeed } = useFeedStore();
   const { loggedIn, follows } = useUserStore();
+  const { mutedPubkeys } = useMuteStore();
 
   const [tab, setTab] = useState<FeedTab>("global");
   const [followNotes, setFollowNotes] = useState<NDKEvent[]>([]);
@@ -43,6 +45,7 @@ export function Feed() {
   const isLoading = isFollowing ? followLoading : loading;
 
   const filteredNotes = activeNotes.filter((event) => {
+    if (mutedPubkeys.includes(event.pubkey)) return false;
     const c = event.content.trim();
     if (!c || c.startsWith("{") || c.startsWith("[")) return false;
     // Filter out notes that look like base64 blobs or relay protocol messages

src/components/feed/NoteCard.tsx

@@ -3,6 +3,7 @@ import { NDKEvent } from "@nostr-dev-kit/ndk";
 import { useProfile } from "../../hooks/useProfile";
 import { useReactionCount } from "../../hooks/useReactionCount";
 import { useUserStore } from "../../stores/user";
+import { useMuteStore } from "../../stores/mute";
 import { useUIStore } from "../../stores/ui";
 import { timeAgo, shortenPubkey } from "../../lib/utils";
 import { publishReaction, publishReply, getNDK } from "../../lib/nostr";
@@ -20,7 +21,9 @@ export function NoteCard({ event }: NoteCardProps) {
   const nip05 = profile?.nip05;
   const time = event.created_at ? timeAgo(event.created_at) : "";
 
-  const { loggedIn } = useUserStore();
+  const { loggedIn, pubkey: ownPubkey } = useUserStore();
+  const { mutedPubkeys, mute, unmute } = useMuteStore();
+  const isMuted = mutedPubkeys.includes(event.pubkey);
   const { openProfile, openThread, currentView } = useUIStore();
   const likedKey = "wrystr_liked";
   const getLiked = () => {
@@ -37,6 +40,7 @@ export function NoteCard({ event }: NoteCardProps) {
   const [replySent, setReplySent] = useState(false);
   const replyRef = useRef<HTMLTextAreaElement>(null);
   const [showZap, setShowZap] = useState(false);
+  const [menuOpen, setMenuOpen] = useState(false);
 
   const handleLike = async () => {
     if (!loggedIn || liked || liking) return;
@@ -80,7 +84,7 @@ export function NoteCard({ event }: NoteCardProps) {
   };
 
   return (
-    <article className="border-b border-border px-4 py-3 hover:bg-bg-hover transition-colors duration-100">
+    <article className="border-b border-border px-4 py-3 hover:bg-bg-hover transition-colors duration-100 group/card">
       <div className="flex gap-3">
         {/* Avatar */}
         <div className="shrink-0 cursor-pointer" onClick={() => openProfile(event.pubkey)}>
@@ -112,6 +116,30 @@ export function NoteCard({ event }: NoteCardProps) {
               <span className="text-text-dim text-[10px] truncate max-w-40">{nip05}</span>
             )}
             <span className="text-text-dim text-[11px] shrink-0">{time}</span>
+            {/* Context menu — hidden until card hover, not shown for own notes */}
+            {loggedIn && event.pubkey !== ownPubkey && (
+              <div className="relative ml-auto">
+                <button
+                  onClick={() => setMenuOpen((v) => !v)}
+                  className="text-text-dim hover:text-text text-[14px] px-1 leading-none opacity-0 group-hover/card:opacity-100 transition-opacity"
+                >
+                  ⋯
+                </button>
+                {menuOpen && (
+                  <>
+                    <div className="fixed inset-0 z-[9]" onClick={() => setMenuOpen(false)} />
+                    <div className="absolute right-0 top-5 bg-bg-raised border border-border shadow-lg z-10 w-32">
+                      <button
+                        onClick={() => { setMenuOpen(false); isMuted ? unmute(event.pubkey) : mute(event.pubkey); }}
+                        className="w-full text-left px-3 py-2 text-[11px] text-text-muted hover:text-danger hover:bg-bg-hover transition-colors"
+                      >
+                        {isMuted ? `unmute` : `mute`}
+                      </button>
+                    </div>
+                  </>
+                )}
+              </div>
+            )}
           </div>
 
           <div