chore: update CHANGELOG for version 0.6.0-alpha, add in-app notification center, and update package dependencies

app/layout-content.tsx

@@ -2,7 +2,8 @@
 
 import { OfflineBanner } from '@/components/OfflineBanner'
 import { Footer } from '@/components/Footer'
-import { Header, GridIcon } from '@ciphera-net/ui'
+import { Header } from '@ciphera-net/ui'
+import NotificationCenter from '@/components/notifications/NotificationCenter'
 import { useAuth } from '@/lib/auth/context'
 import { useOnlineStatus } from '@/lib/hooks/useOnlineStatus'
 import Link from 'next/link'
@@ -63,6 +64,7 @@ export default function LayoutContent({ children }: { children: React.ReactNode
         showSecurity={false}
         showPricing={true}
         topOffset={showOfflineBar ? `${barHeightRem}rem` : undefined}
+        rightSideActions={auth.user ? <NotificationCenter /> : null}
         customNavItems={
           <>
             {!auth.user && (