chore: add watchOptions to webpack configuration for improved file watching performance

webpack.config.js

@@ -383,6 +383,13 @@ export default {
     }),
     new InlineCssPlugin(),
   ].filter(Boolean),
+  watchOptions: {
+    // Only rebuild when file content actually changes, not just timestamps
+    aggregateTimeout: 300, // Wait 300ms after a change before rebuilding
+    poll: false, // Use native file watching instead of polling
+    ignored: /node_modules/, // Ignore node_modules for performance
+    followSymlinks: false, // Don't follow symlinks
+  },
   devServer: {
     allowedHosts: 'all',
     compress: true,