Initial commit: Pezkuwi SDK UI

Comprehensive web interface for interacting with Pezkuwi blockchain.

Features:
- Blockchain explorer
- Wallet management
- Staking interface
- Governance participation
- Developer tools

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/react-query/src/NodeVersion.tsx

@@ -0,0 +1,27 @@
+// Copyright 2017-2026 @pezkuwi/react-query authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import React from 'react';
+
+import { useApi } from '@pezkuwi/react-hooks';
+
+interface Props {
+  children?: React.ReactNode;
+  className?: string;
+  label?: React.ReactNode;
+}
+
+function NodeVersion ({ children, className = '', label }: Props): React.ReactElement<Props> {
+  const { systemVersion } = useApi();
+
+  // eg. 0.1.0-90d0bb6-x86_64-macos
+  const displayVersion = systemVersion.split('-')[0];
+
+  return (
+    <div className={className}>
+      {label || ''}{displayVersion}{children}
+    </div>
+  );
+}
+
+export default React.memo(NodeVersion);