Working feed: NDK + relay connection + live notes from Nostr

- Tailwind CSS + Zustand + NDK installed and configured
- Sidebar with feed/relays/settings navigation
- Global feed view with live notes from relays
- Profile fetching with caching and deduplication
- Relay connection with timeout handling
- Note cards with avatar, name, timestamp, content
- Dark theme, monospace, no-slop UI
- Devtools enabled for debugging

src/types/nostr.ts

@@ -0,0 +1,30 @@
+import { NDKEvent, NDKKind } from "@nostr-dev-kit/ndk";
+
+export interface NostrProfile {
+  npub: string;
+  pubkey: string;
+  name?: string;
+  displayName?: string;
+  about?: string;
+  picture?: string;
+  nip05?: string;
+  lud16?: string; // lightning address
+  banner?: string;
+}
+
+export interface NostrNote {
+  id: string;
+  pubkey: string;
+  content: string;
+  created_at: number;
+  kind: NDKKind;
+  tags: string[][];
+  profile?: NostrProfile;
+  event: NDKEvent;
+}
+
+export interface RelayInfo {
+  url: string;
+  connected: boolean;
+  latencyMs?: number;
+}