Add in-app notification bell with unread count

[Mystery-CLI]

The Notification model has a read boolean. Add a bell icon in the header that shows the count of unread notifications. Clicking it opens a dropdown listing recent notifications. Marking one as read calls a PATCH /api/notifications/:id/read endpoint.

[fwseyi]

@fwseyi has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Hi, I’d like to work on this. I’ll add a notification bell with unread count in the header, implement a dropdown listing recent notifications, and wire up marking items as read via the PATCH endpoint with real-time count updates.

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[temma02]

@temma02 has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Hello team,
I'd like to take on this task and feel free to assign it to me.
Looking forward to getting started!

ℹ️ Repo Maintainers: To accept this application, review their application or assign @temma02 to this issue.

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Congratulations, @temma02! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on April 29, 2026.

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This issue has been completed by @temma02 as part of the Stellar Wave Program's 4th Wave 🥳

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