fix(plugin): ensure correct handling of worker.plugins for robust obfuscation

- Pass `obfuscateWorker: true` to enable worker obfuscation by default in tests.
- Improve resolution of `worker.plugins` to handle various input types and ensure reliability.

Author: z0ffy

src/__tests__/plugin.spec.ts

@@ -1024,7 +1024,7 @@ describe('viteBundleObfuscator plugin', () => {
     });
 
     it('should auto inject worker obfuscator plugin', () => {
-      const plugin = viteBundleObfuscator() as Plugin;
+      const plugin = viteBundleObfuscator({obfuscateWorker: true}) as Plugin;
       const originalWorkerPlugins = vi.fn().mockReturnValue([{name: 'user-worker-plugin'}]);
       const config = {worker: {plugins: originalWorkerPlugins}} as any;
       const env = {command: 'build', mode: 'production', isSsrBuild: false};

src/index.ts

@@ -69,7 +69,14 @@ export default function viteBundleObfuscator(config?: Partial<Config>): PluginOp
 
       config.worker = config.worker || {};
       config.worker.plugins = () => {
-        const originalPlugins = (isFunction(original) ? original() : []) || [];
+        const originalPluginsOption = original ?? [];
+        const resolvedOriginalPlugins = isFunction(originalPluginsOption)
+          ? originalPluginsOption()
+          : originalPluginsOption;
+        const originalPlugins = (isArray(resolvedOriginalPlugins)
+          ? resolvedOriginalPlugins
+          : [resolvedOriginalPlugins]
+        ).filter(Boolean);
 
         const hasWorkerPlugin = originalPlugins.some(
           p => isObject(p) && 'name' in p && (p as any).name === 'vite-plugin-bundle-obfuscator:worker',