feat(core): adjust filter area style (#12534)

<!-- 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 -->

packages/frontend/i18n/src/i18n-completenesses.json

@@ -1,26 +1,26 @@
 {
-  "ar": 94,
+  "ar": 93,
   "ca": 4,
   "da": 4,
-  "de": 94,
-  "el-GR": 94,
+  "de": 93,
+  "el-GR": 93,
   "en": 100,
-  "es-AR": 94,
-  "es-CL": 95,
-  "es": 94,
-  "fa": 94,
-  "fr": 94,
+  "es-AR": 93,
+  "es-CL": 94,
+  "es": 93,
+  "fa": 93,
+  "fr": 93,
   "hi": 2,
-  "it-IT": 94,
+  "it-IT": 93,
   "it": 1,
-  "ja": 94,
+  "ja": 93,
   "ko": 54,
-  "pl": 94,
-  "pt-BR": 94,
-  "ru": 94,
-  "sv-SE": 94,
-  "uk": 94,
+  "pl": 93,
+  "pt-BR": 93,
+  "ru": 93,
+  "sv-SE": 93,
+  "uk": 93,
   "ur": 2,
-  "zh-Hans": 94,
-  "zh-Hant": 94
+  "zh-Hans": 93,
+  "zh-Hant": 93
 }