Add onboarding form dirty-state leave prompt

[Chucks1093]

Summary
Add onboarding form dirty-state leave prompt

Scope

• detect unsaved changes in creator onboarding form\n- show leave prompt on navigation attempts\n- allow explicit discard flow

Acceptance Criteria

• scoped change is implemented with no unrelated file churn
• docs/tests are updated where applicable
• contributor can validate the outcome locally

Contributor coordination: if you pick this up, reach out in Telegram for updates or clarification: https://t.me/accesslayerorg

[steph-crown]

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

Hi maintainer, can i work on this issue?

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[emdevelopa]

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

Hii maintainer I will like to jump on this issue

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[barry01-hash]

@barry01-hash has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

I would love to work on this issues

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[drips-wave]

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

🧑‍💻 @emdevelopa: 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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[damijames]

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

I'd like to work on this .

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[drips-wave]

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

🧑‍💻 @damijames: 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

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🤠 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 🌊

[drips-wave]

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

😎 @damijames: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here. You can also Leave a review to share your experience working on this issue.

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