[feat] Add enhanced filter UI components with search and clear functionality (#5119)

* [feat] Add enhanced filter UI components with search and clear functionality

- Add SearchBox, clear all button, and item count to MultiSelect header
- Add 'fit-content' size option to button types for flexible sizing
- Update SingleSelect and ModelSelector components for consistency
- Add localization strings for item selection and clear all functionality

Co-Authored-By: Claude <noreply@anthropic.com>

* Update locales [skip ci]

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: github-actions <github-actions@github.com>

src/components/input/SingleSelect.vue

@@ -99,7 +99,7 @@ const pt = computed(() => ({
   overlay: {
     class: [
       // dropdown panel
-      'mt-2 bg-white dark-theme:bg-zinc-800 text-neutral dark-theme:text-white rounded-lg'
+      'mt-2 bg-white dark-theme:bg-zinc-800 text-neutral dark-theme:text-white rounded-lg border border-solid border-zinc-100 dark-theme:border-zinc-700'
     ]
   },
   list: {