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-hooks/src/useBestNumber.ts

@@ -0,0 +1,25 @@
+// Copyright 2017-2026 @pezkuwi/react-hooks authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { BlockNumber } from '@pezkuwi/types/interfaces';
+
+import { createNamedHook } from './createNamedHook.js';
+import { useApi } from './useApi.js';
+import { useCall } from './useCall.js';
+import { useStakingAsyncApis } from './useStakingAsyncApis.js';
+
+function useBestNumberImpl (): BlockNumber | undefined {
+  const { api } = useApi();
+
+  return useCall<BlockNumber>(api.derive.chain.bestNumber);
+}
+
+function useBestNumberRelayImpl (): BlockNumber | undefined {
+  const { api } = useApi();
+  const { isStakingAsync, rcApi } = useStakingAsyncApis();
+
+  return useCall<BlockNumber>((isStakingAsync ? rcApi : api)?.derive.chain.bestNumber);
+}
+
+export const useBestNumber = createNamedHook('useBestNumber', useBestNumberImpl);
+export const useBestNumberRelay = createNamedHook('useBestNumberRelay', useBestNumberRelayImpl);