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/apps/webpack.serve.cjs

@@ -0,0 +1,37 @@
+// Copyright 2017-2025 @polkadot/apps authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+const path = require('path');
+const HtmlWebpackPlugin = require('html-webpack-plugin');
+const { merge } = require('webpack-merge');
+
+const baseConfig = require('./webpack.base.cjs');
+
+module.exports = merge(
+  baseConfig(__dirname, 'development'),
+  {
+    devServer: {
+      headers: {
+        'Content-Security-Policy': "frame-ancestors 'none'",
+        'X-Frame-Options': 'DENY'
+      },
+      hot: true,
+      open: false,
+      port: 3000,
+      static: path.resolve(__dirname, 'build')
+    },
+    plugins: [
+      new HtmlWebpackPlugin({
+        PAGE_TITLE: 'Polkadot/Substrate Portal',
+        inject: true,
+        template: path.join(__dirname, 'public/index.html')
+      })
+    ],
+    watchOptions: {
+      // 5.66.0 work-around (was reduced to 20, then started failing)
+      // https://github.com/webpack/webpack/commit/96da7660021e8aa31e163bacd3515960eb253422#diff-13cf5374edb5eced5f3770d5f346c59252f87a90de91bc57306077693c8b95e2R52
+      aggregateTimeout: 600,
+      ignored: ['.yarn', 'build', 'node_modules']
+    }
+  }
+);