Add dashboard warning for demo-mode payment evidence

[emrekayat]

Why this matters

SCF reviewers need to distinguish deterministic demo output from real x402/Stellar payment evidence without reading backend logs.

Scope

Add a small warning or badge in the paid result area when the current result was produced in demo mode or lacks verified payment evidence.

Suggested files:

• apps/web/src/App.tsx
• apps/web/src/types.ts
• shared response schemas if needed.

Acceptance criteria

• Real payment evidence renders as verified or linked when available.
• Demo-mode results render a clear demo/fallback badge.
• Missing evidence never appears as verified.
• The badge is driven by API response fields, not hard-coded UI state.
• Frontend test or component test covers demo and verified states.

Wave complexity

High - prevents overclaiming payment settlement in demos and investor walkthroughs.

[Bojest001]

@Bojest001 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi maintainer I will to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Bojest001 to this issue.

[Micheal-Blessed]

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

i will love to work on this

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

[drips-wave]

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

🧑‍💻 @Micheal-Blessed: 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.

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