Fix port for real

frontend/webpack.config.js

@@ -1,44 +1,57 @@
 const path = require('path');
 const HtmlWebpackPlugin = require('html-webpack-plugin');
 
-module.exports = {
-  entry: './src/index.tsx',
-  output: {
-    path: path.resolve(__dirname, 'dist'),
-    filename: 'bundle.js',
-    clean: true,
-    publicPath: './',
-  },
-  resolve: {
-    extensions: ['.ts', '.tsx', '.js', '.jsx'],
-  },
-  module: {
-    rules: [
-      {
-        test: /\.tsx?$/,
-        exclude: /node_modules/,
-        use: 'ts-loader',
-      },
-      {
-        test: /\.css$/,
-        use: ['style-loader', 'css-loader', 'postcss-loader'],
-      },
+module.exports = (env, argv) => {
+  const isProduction = argv.mode === 'production';
+
+  return {
+    entry: './src/index.tsx',
+    output: {
+      path: path.resolve(__dirname, 'dist'),
+      filename: 'bundle.js',
+      clean: true,
+      
+      // Empty string generates relative paths that work through proxies
+      publicPath: '',
+    },
+    resolve: {
+      extensions: ['.ts', '.tsx', '.js', '.jsx'],
+    },
+    module: {
+      rules: [
+        {
+          test: /\.tsx?$/,
+          exclude: /node_modules/,
+          use: 'ts-loader',
+        },
+        {
+          test: /\.css$/,
+          use: ['style-loader', 'css-loader', 'postcss-loader'],
+        },
+      ],
+    },
+    plugins: [
+      new HtmlWebpackPlugin({
+        template: './src/index.html',
+      }),
     ],
-  },
-  plugins: [
-    new HtmlWebpackPlugin({
-      template: './src/index.html',
-    }),
-  ],
-  devServer: {
-    port: 3000,
-    allowedHosts: 'all',
-    historyApiFallback: true,
-    proxy: [
-      {
-        context: ['/api'],
-        target: 'http://localhost:8001',
+    devServer: {
+      port: 3000,
+      allowedHosts: 'all',
+      historyApiFallback: {
+        index: 'index.html',
       },
-    ],
-  },
+      // Disable WebSocket-based HMR for proxy compatibility
+      // VS Code web proxy sends WebSocket messages as Blobs which breaks HMR
+      webSocketServer: false,
+      hot: false,
+      liveReload: false,
+      proxy: [
+        {
+          context: ['/api'],
+          target: 'http://localhost:8001',
+        },
+      ],
+    },
+  };
 };