Replace single API format selector with multi-select checkbox interface in endpoint creation dialog. Users can now select multiple API formats to create multiple endpoints simultaneously with shared configuration (URL, path, timeout, etc.).
- Change API format selection from dropdown to checkbox grid layout
- Add selectedFormats array to track multiple format selections
- Implement batch creation logic with individual error handling
- Update submit button to show endpoint count being created
- Adjust form layout to improve visual hierarchy
- Display appropriate success/failure messages for batch operations
- Reset selectedFormats on form reset
Models are now sorted by release date in descending order (newest first)
within each provider group. Models without release dates are placed at the
end. When release dates are identical or missing, models fall back to
alphabetical sorting by name.