fix(theme): Conditionally load CSS to support dev and prod builds

The plugin's CSS was not loading in production builds. Adding it via getClientModules() fixed the build, but broke dark mode in development.

This change makes the CSS loading conditional:
- In production, getClientModules() is used to ensure the stylesheet is bundled.
- In development, this is disabled, allowing Docusaurus's default handling to manage theme changes and hot-reloading correctly.

Author: Uli-Z

src/index.ts

@@ -40,13 +40,23 @@ export default function docusaurusPluginResistogram(
   );
   ensureDirSync(pluginDataDir);
 
+  const isProd = process.env.NODE_ENV === 'production';
+
   return {
     name: "docusaurus-plugin-resistogram",
 
     getThemePath() {
       return path.resolve(__dirname, "./theme");
     },
 
+    // Explicitly add the theme's stylesheet to the client modules only for the production build.
+    // This is a workaround for an issue where the styles are not being picked up automatically
+    // in the production build. In development, this is disabled to allow for hot-reloading
+    // and correct dark mode behavior.
+    getClientModules() {
+      return isProd ? [path.resolve(__dirname, './theme/ResistanceTable/styles.module.css')] : [];
+    },
+
     async contentLoaded({ actions }: { actions: any }) {
       const { abx, org, sources, hierarchicalSources, allAbxIds, allOrgIds, orgClasses, orgIdToRank, abxSyn2Id, orgSyn2Id } = await getSharedData(dataPath, files);