refactor(tauri): correct script wrapping in execute function

- Updated the `execute` function to properly wrap string scripts in an IIFE with braces, ensuring correct syntax for execution.
- Adjusted related test cases to reflect the updated script format, enhancing the accuracy of expectations for script execution.

Author: goosewobbler

packages/tauri-service/src/service.ts

@@ -323,7 +323,7 @@ export default class TauriWorkerService {
       //   - embedded: pass as-is (WebDriver handles execution)
       //   - non-embedded: wrap in async IIFE to make statement expressions callable
       const scriptString =
-        typeof script === 'function' ? script.toString() : isEmbedded ? script : `(async () => ${script})()`;
+        typeof script === 'function' ? script.toString() : isEmbedded ? script : `(async () => { ${script} })()`;
 
       if (isEmbedded) {
         // For embedded WebDriver: skip console wrapper as console forwarding

packages/tauri-service/test/service.spec.ts

@@ -100,7 +100,7 @@ describe('TauriWorkerService', () => {
       (service as any).patchBrowserExecute(mockBrowser);
       mockBrowser.execute('return document.title');
 
-      expect(mockExecute).toHaveBeenCalledWith(expect.stringContaining('(async () => return document.title)()'));
+      expect(mockExecute).toHaveBeenCalledWith(expect.stringContaining('(async () => { return document.title })()'));
     });
 
     it('should pass function scripts as-is for non-embedded providers', () => {