Toast notification system for feedback

[parkerwinner]

Description: Implement toast notification system for success/error/info messages with queuing and auto-dismiss.

File Changes:

• frontend/src/components/ui/Toast.tsx - Create toast component
• frontend/src/lib/toast.ts - Add toast utilities
• frontend/src/app/layout.tsx - Add toast container

Branch: feature/toast-notifications

PR Title: Implement toast notification system

Additional Info: Support multiple variants (success/error/info/warning), add action buttons, implement queue for multiple toasts, add auto-dismiss with configurable duration.

[DaddyMord]

@DaddyMord has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi Maintainer, I’d like to work on this issue. I have experience handling similar tasks and can start immediately.

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[legend-esc]

@legend-esc has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Please assign me I can work on this

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[drips-wave]

Congratulations, @Rickyy1017! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @Rickyy1017: 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.

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[OpensrcLord]

@Zeemnew has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello @maintainer, I’ve gone through the requirements and I’m confident I can implement a proper solution that matches the acceptance criteria. Kindly assign this issue to me. And I will deliver at the shortest possible time.

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

[ReinaMaze]

@ReinaMaze has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Gm maintainer, can I work on this issue
ETA : 6 hours

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