Add User Activity Timeline

[Abd-Standard]

Description

Display recent user actions related to subscriptions and notification management.

Acceptance Criteria
Timeline loads correctly.
Events appear chronologically.
Empty state is handled.

[heymide]

@heymide has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Interested in contributing to this issue. I'll ensure the implementation is clean, tested, and follows project conventions.

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

[miss-yusrah]

@miss-yusrah has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Helloo Repo Maintainer, I'd like to work on this issue

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

[drips-wave]

Congratulations, @miss-yusrah! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @miss-yusrah: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊