web(UserMenu): add copy address feedback toast notification

[pragmaticAweds]

Summary

Clicking copy address provides no visual feedback.

Where

apps/web/src/components/molecules/UserMenu.tsx:30-45

Why this is a real bug, not just lint noise

1. Affects user experience, functionality, or performance in production.
2. Needs to be addressed to ensure robustness across all supported devices and Stellar network states.

Fix

Display toast notification on copy success.

Acceptance criteria

• Issue is resolved in apps/web/src/components/molecules/UserMenu.tsx:30-45.
• No regression introduced in existing test suites.

[Samuelaladesiun3334]

@Samuelaladesiun3334 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Please I wou;d love to work on this Project

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Samuelaladesiun3334 to this issue.

[alade-dev]

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

Hi, I would love to work on this issue.

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

[drips-wave]

Congratulations, @Samuelaladesiun3334! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @Samuelaladesiun3334: 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 🌊

[Samuelaladesiun3334]

Good Day maintainer
THE WORK IS DONE
@Idrhas