FE-33: Launch Readiness UX for Transactions (Simulate → Sign → Submit)

[Cedarich]

Complexity: 150 points
Summary
Make the transaction pipeline resilient and understandable with clear states and deterministic error handling around simulate/sign/submit.
Tasks

• Implement a consistent stepper UI for simulate/sign/submit.
• Add retry behavior that does not duplicate actions.
• Improve error mapping (network errors vs contract errors vs user rejection).
• Add screenshots for all states and at least two failure cases.
  Acceptance Criteria
• Users always know what step they are in and what to do next.
• Retries do not create duplicate payments.
• Error messaging is specific and consistent.

---

[OnyemaAnthony]

@OnyemaAnthony has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

maintainer please assign this issue to me

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

[drips-wave]

Congratulations, @OnyemaAnthony! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @OnyemaAnthony: 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 🌊

[Cedarich]

@OnyemaAnthony What is the update here??

I’ll unassign if PR is not sent by morning