Bump to v0.2.0 — Phase 2: Engagement & Reach

Four features shipped in this release:

- Feed reply context: replies show "↩ replying to @name" above the
  note content; clicking fetches and opens the parent thread

- NIP-65 outbox model: fetchUserRelayList + publishRelayList +
  fetchUserNotesNIP65 in client.ts; profile notes fetched via the
  author's write relays; "Publish relay list to Nostr" button in
  Settings (kind 10002)

- Notifications: new store (notifications.ts) + NotificationsView;
  🔔 sidebar nav item with unread badge; DM nav item also shows
  unread conversation count; badges clear on open/select

- Keyboard shortcuts: useKeyboardShortcuts hook + HelpModal;
  n=compose, /=search, j/k=feed nav with ring highlight,
  Esc=back, ?=help overlay

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

src/hooks/useKeyboardShortcuts.ts

@@ -0,0 +1,42 @@
+import { useEffect } from "react";
+import { useUIStore } from "../stores/ui";
+import { useFeedStore } from "../stores/feed";
+
+export function useKeyboardShortcuts() {
+  const { currentView, setView, goBack, toggleHelp } = useUIStore();
+  const { focusedNoteIndex, setFocusedNoteIndex, notes } = useFeedStore();
+
+  useEffect(() => {
+    const handler = (e: KeyboardEvent) => {
+      const tag = (e.target as HTMLElement).tagName;
+      if (tag === "INPUT" || tag === "TEXTAREA" || (e.target as HTMLElement).isContentEditable) return;
+      switch (e.key) {
+        case "n":
+          setView("feed");
+          setTimeout(() => (document.querySelector("[data-compose]") as HTMLTextAreaElement)?.focus(), 50);
+          break;
+        case "/":
+          e.preventDefault();
+          setView("search");
+          setTimeout(() => (document.querySelector("[data-search-input]") as HTMLInputElement)?.focus(), 50);
+          break;
+        case "Escape":
+          goBack();
+          break;
+        case "?":
+          toggleHelp();
+          break;
+        case "j":
+          if (currentView === "feed")
+            setFocusedNoteIndex(Math.min(focusedNoteIndex + 1, notes.length - 1));
+          break;
+        case "k":
+          if (currentView === "feed")
+            setFocusedNoteIndex(Math.max(focusedNoteIndex - 1, 0));
+          break;
+      }
+    };
+    window.addEventListener("keydown", handler);
+    return () => window.removeEventListener("keydown", handler);
+  }, [currentView, focusedNoteIndex, notes.length]);
+}