[contrib-wave] Frontend: Severity-trend chart for repeated scans of same workspace

[Gbangbolaoluwagbemiga]

Problem

Scanning a contract repo over time should show a trend; we currently treat every scan independently.

Acceptance Criteria

• Track last N scans per workspace in IndexedDB
• Mini line chart per severity on the dashboard
• "Clear history" control

Pointers

• frontend/app/components/SummaryChart.tsx

[anoncon]

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

Hi
I’d like to work on this issue if it’s available. I’m a full-stack Web2 & Web3 developer with solid open-source experience and can start working on it right away.

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[drips-wave]

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

🧑‍💻 @anoncon: 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.

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[drips-wave]

This issue has been completed by @anoncon as part of the Stellar Wave Program's 5th Wave 🥳

😎 @anoncon: 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.

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