[TESTING & QA] Generate and enforce minimum test coverage thresholds

[dev-fatima-24]

Priority: high

Description

There are no test coverage thresholds enforced in CI, meaning coverage can silently drop as new code is added. Coverage thresholds must be configured for the backend (80%) and frontend (70%), and CI must fail if coverage drops below these thresholds.

Acceptance Criteria

• Backend test coverage measured with Jest --coverage
• Frontend test coverage measured with Jest --coverage
• CI fails if backend coverage drops below 80%
• CI fails if frontend coverage drops below 70%
• Coverage report is uploaded as a CI artifact and displayed in PR comments

[Timothy2025-20]

@Timothy2025-20 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hi team, am a software engineer with her of experience and I would love to address and resolve this issue if assigned to me. Thank you 🙏

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Timothy2025-20 to this issue.

[drips-wave]

Congratulations, @Timothy2025-20! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @Timothy2025-20: 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 @Timothy2025-20 as part of the Stellar Wave Program's 5th Wave 🥳

😎 @Timothy2025-20: 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.