- Fix critical race condition in sync dropdown actions
- Add loading states and spinners for sync operations
- Implement proper event delegation to prevent memory leaks
- Add accessibility attributes (aria-label, aria-haspopup, aria-expanded)
- Add keyboard navigation (Escape to close dropdown)
- Reduce code duplication in sync functions (70% reduction)
- Improve error handling for pricelist badge
- Fix z-index issues in dropdown menu
- Maintain full backward compatibility
Addresses all issues identified in the TODO list and bug reports
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