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-components/src/Chart/index.ts

@@ -0,0 +1,48 @@
+// Copyright 2017-2026 @pezkuwi/react-components authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { ChartType, Plugin } from 'chart.js';
+
+import { CategoryScale, Chart, LinearScale, LineElement, PointElement, Title, Tooltip } from 'chart.js';
+import annotationPlugin from 'chartjs-plugin-annotation';
+import crosshairPlugin from 'chartjs-plugin-crosshair';
+
+import Doughnut from './Doughnut.js';
+import HorizBar from './HorizBar.js';
+import Line from './Line.js';
+
+interface CrosshairChart {
+  crosshair?: boolean;
+}
+
+function CustomCrosshairPlugin (plugin: Plugin<ChartType>): Plugin<ChartType> {
+  const originalAfterDraw = plugin.afterDraw;
+
+  if (originalAfterDraw) {
+    plugin.afterDraw = function (chart, args): void {
+      if ((chart as CrosshairChart).crosshair) {
+        // @ts-expect-error - Pass exactly what the original plugin expects
+        originalAfterDraw.call(this, chart, args);
+      }
+    };
+  }
+
+  return plugin;
+}
+
+Chart.register(
+  CategoryScale,
+  LinearScale,
+  LineElement,
+  PointElement,
+  Title,
+  Tooltip,
+  annotationPlugin,
+  CustomCrosshairPlugin(crosshairPlugin as Plugin<ChartType>)
+);
+
+export default {
+  Doughnut,
+  HorizBar,
+  Line
+};