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/components/shared/HelpModal.tsx

@@ -0,0 +1,42 @@
+const SHORTCUTS = [
+  { key: "n", desc: "New note / focus compose" },
+  { key: "/", desc: "Search" },
+  { key: "j", desc: "Next note in feed" },
+  { key: "k", desc: "Previous note in feed" },
+  { key: "Esc", desc: "Go back" },
+  { key: "?", desc: "This help" },
+];
+
+export function HelpModal({ onClose }: { onClose: () => void }) {
+  return (
+    <div
+      className="fixed inset-0 z-50 flex items-center justify-center bg-black/50"
+      onClick={onClose}
+    >
+      <div
+        className="bg-bg border border-border shadow-xl p-6 w-72"
+        onClick={(e) => e.stopPropagation()}
+      >
+        <div className="flex items-center justify-between mb-4">
+          <h2 className="text-text text-sm font-medium tracking-wide">Keyboard Shortcuts</h2>
+          <button
+            onClick={onClose}
+            className="text-text-dim hover:text-text transition-colors text-[14px]"
+          >
+            ×
+          </button>
+        </div>
+        <div className="space-y-2">
+          {SHORTCUTS.map(({ key, desc }) => (
+            <div key={key} className="flex items-center gap-3">
+              <kbd className="bg-bg-raised border border-border text-text text-[11px] font-mono px-2 py-0.5 min-w-[2.5rem] text-center shrink-0">
+                {key}
+              </kbd>
+              <span className="text-text-dim text-[12px]">{desc}</span>
+            </div>
+          ))}
+        </div>
+      </div>
+    </div>
+  );
+}