[DB-005] Build admin system configuration page

[ONEONUORA]

Description

Allow admins to adjust naira stablecoin transaction fee settings.

Files to Edit/Create

• dashboard/app/dashboard/contracts/page.tsx

Acceptance Criteria

• Form updates contract parameter states on-chain.

Guidance / Hints

Submit transaction updating fee coefficient inside payment contract.

[Iwueseiter]

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

Hello Maintainer,

My name is Iwueseiter, and I am a frontend developer with solid experience in React, Next.js, TypeScript, JavaScript, and frontend integrations.

Beyond implementing the required features, I place strong emphasis on clean, maintainable code and ensuring the final output aligns closely with the provided design while remaining visually appealing and user-friendly.

I can complete this task within an estimated timeline of 24 hrs.
Thank you for your consideration.

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

[drips-wave]

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

🧑‍💻 @Iwueseiter: 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 🌊

[drips-wave]

This issue has been completed by @Iwueseiter as part of the Stellar Wave Program's 6th Wave 🥳

😎 @Iwueseiter: 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.

🧑‍💻 Repo maintainers: How'd the contributor do? Leave a review to share your experience working with them.