[Frontend] [Enhancement] Implement Loading Spinner and Success State for final submission

[Tybravo]

🎯 Goal

Improve UX during the potentially slow blockchain transaction.

📋 Requirements

• Show an overlay spinner while waiting for Freighter/Soroban.
• Show a success component upon completion.

🔧 Technical Scope

• React State / Animations

📂 Affected Path

frontend/features/verification/components/steps/ReviewSubmitStep.tsx

✅ Acceptance Criteria

• UI clearly indicates processing state.

🔗 PR Requirements

• PR description must include: Closes #[issue_id]

[DevALVIN-24]

@DevALVIN-24 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi, I'd like to work on this issue! because I am very conversant with solving problems like this, and i can submit the pr with 48hr

ℹ️ Repo Maintainers: To accept this application, review their application or assign @DevALVIN-24 to this issue.

[chigozirim007]

@chigozirim007 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello please I would like to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @chigozirim007 to this issue.

[drips-wave]

Congratulations, @chigozirim007! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @chigozirim007: 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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