use IIFE for entry points.

rspack.config.ts

@@ -9,6 +9,8 @@ const isDev = process.env.NODE_ENV === 'development';
 const targets = ['last 2 versions', '> 0.2%', 'not dead', 'Firefox ESR'];
 
 export default defineConfig({
+  mode: isDev ? 'development' : 'production',
+  devtool: isDev ? 'inline-cheap-module-source-map' : false,
   entry: { config: './src/config/index.tsx', desktop: './src/desktop/index.tsx' },
   output: {
     path: './plugin/js',
@@ -17,7 +19,6 @@ export default defineConfig({
   resolve: {
     extensions: ['...', '.ts', '.tsx', '.jsx'],
   },
-  devtool: isDev ? 'inline-cheap-module-source-map' : false,
   module: {
     rules: [
       {