Configure Rspack Fast Refresh plugin in development

Author: cursoragent

config/webpack/client.js

@@ -23,8 +23,4 @@ environment.plugins.append(
   }),
 );
 
-if (devBuild && isHMR && config.assets_bundler !== 'rspack') {
-  // Rspack is the only supported bundler for this repo; no webpack refresh plugin wiring.
-}
-
 module.exports = environment;

config/webpack/development.js

@@ -4,13 +4,13 @@
 process.env.NODE_ENV = process.env.NODE_ENV || 'development';
 
 const { inliningCss } = require('shakapacker');
+const ReactRefreshRspackPlugin = require('@rspack/plugin-react-refresh');
 
 const webpackConfig = require('./webpackConfig');
 
-const developmentEnvOnly = (_clientWebpackConfig, _serverWebpackConfig) => {
+const developmentEnvOnly = (clientWebpackConfig, _serverWebpackConfig) => {
   if (inliningCss) {
-    // Rspack HMR/refresh is handled by Shakapacker + @rspack/plugin-react-refresh.
-    // No extra development-only plugin wiring is needed here.
+    clientWebpackConfig.plugins.push(new ReactRefreshRspackPlugin());
   }
 };