Add test coverage reporting and enforce minimum threshold in CI

[Abdulazeem-code]

Description

There is no coverage reporting. Contributors can merge PRs that reduce test coverage without any visibility.

Proposed Solution

Configure Jest with --coverage and set minimum thresholds (e.g., 70% lines, 60% branches). Add a CI step that fails the build if coverage drops.

Acceptance Criteria

• Jest configured with coverage collection
• Coverage thresholds set in package.json or jest.config
• CI pipeline fails on coverage regression
• Coverage report uploaded as build artifact

Suggested Implementation Areas

package.json, .github/workflows/

Impact

Prevents gradual test coverage erosion and ensures new code is adequately tested.

[adelekevictor12]

@adelekevictor12 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hello maintainer, I can fix this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @adelekevictor12 to this issue.

[Primex-hub]

@Primex-hub has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I will love to fix this issue

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

[drips-wave]

Congratulations, @adelekevictor12! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @adelekevictor12: 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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