Add a new "Check Model Updates" option to the global context menu that allows users to manually check for model updates. This includes:
- Adding refreshUpdates endpoint to API configuration
- Implementing checkModelUpdates method with proper loading states
- Adding internationalization support for update messages
- Handling success/error states with appropriate user feedback
- Automatically reloading models after update check completes
The feature provides users with manual control over update checks and improves visibility into model update availability.
