Add missing working_dir field to workspace in LLM test

- Fix 422 error by adding required working_dir field to workspace object
- This completes the API request structure for conversation creation

Co-authored-by: openhands <openhands@all-hands.dev>

Author: openhands-agent

example/src/utils/serverStatus.ts

@@ -93,7 +93,8 @@ export const testLLMConfiguration = async (settings: Settings): Promise<{ succes
         },
         workspace: {
           type: 'local',
-          path: '/tmp/test-workspace'
+          path: '/tmp/test-workspace',
+          working_dir: '/tmp/test-workspace'
         }
       }),
       signal: AbortSignal.timeout(10000), // 10 second timeout