Replace EventBusCheckboxes with card-based notification settings:
- Each event group gets its own card with responsive grid layout
- Master checkbox per group with indeterminate state
- Inline parameter inputs (CPU threshold) appear when enabled
- Theme-adaptive via Ant Design Card component
Components:
- NotificationLayout, NotificationCard, NotificationHeader, NotificationEvent
- TelegramNotifications, EmailNotifications with explicit event configs
Sentiago