feat: add delete buttons for categories and tags in combobox dropdown

- Add onDelete prop to ColoredItemCombobox with X button per item
- Wire up deleteCategory/deleteTag API calls in AdminNewsCreate
- Auto-clear selection if the deleted item was selected
- Spinner on delete, haptic feedback, i18n aria-label

src/locales/ru.json

@@ -5089,7 +5089,8 @@
         "searchOrCreate": "Поиск или создание...",
         "noItems": "Ничего не найдено",
         "placeholder": "Выберите...",
-        "clear": "Очистить"
+        "clear": "Очистить",
+        "delete": "Удалить {{name}}"
       },
       "toolbar": {
         "bold": "Жирный",