Enhance refund service with automated eligibility checks and audit trail

[gelluisaac]

Description

Upgrade the refund service to automatically determine refund eligibility based on fare rules, timing, and booking status while maintaining a comprehensive audit trail.

Scope

• packages/backend/src/services/refundService.ts
• packages/backend/src/services/refundAuditService.ts
• packages/backend/src/api/routes/refunds.ts
• packages/client/app/refunds/

Acceptance Criteria

• Automated eligibility engine evaluates fare rules, cancellation window, and ticket type
• Refund amount calculated dynamically based on airline policy and timing
• Comprehensive audit trail logs all refund decisions with timestamps
• Admin override capability with mandatory justification field
• Partial refund support for unused segments
• Refund status webhook integration with airline systems
• Dashboard shows refund analytics and common rejection reasons

[Sammygee12]

@Sammygee12 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi Maintainer, I’ve gone through the issue in detail and have a clear plan for the fix, I’d like to take this one on if it’s still open.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Sammygee12 to this issue.

[edehvictor]

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

Hi maintainers!
I’d love to help out with this issue. I’ve checked the current codebase/documentation and know exactly what needs to be updated to make this clearer. I will ensure everything aligns perfectly with your existing contribution guidelines.

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

[drips-wave]

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

🧑‍💻 @edehvictor: 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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