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## Summary by CodeRabbit
* **New Features**
* Added a "Delete All" option in the notifications list, allowing users
to mark all notifications as read at once.
* Introduced a header with a menu button in the notifications list for
easier access to actions.
* **Style**
* Updated notification list layout with improved structure, including a
header and a scrollable content area.
* **Localization**
* Added a new English localization string for the "Delete all
notifications" action.
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