<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Added support for displaying the "Add Filter" action as either an icon button or a labeled button, depending on the filter state.
- Introduced a localized label for the "Add Filter" button.
- **Style**
- Improved filter area layout and styling for better visual consistency.
- Adjusted padding and added styles to hide empty filter values.
- **Bug Fixes**
- Updated test identifiers for filter value elements to improve test reliability.
- **Documentation**
- Added a new English localization string for the "Add Filter" button.
- **Chores**
- Updated translation completeness percentages for various locales.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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