[Backend] Fix LeaderboardEntry type not assignable to null in playground routes

[ayomideadeniran]

🚀 Feature Overview

src/routes/playground/playground.routes.ts at line 40 has error TS2322: Type LeaderboardEntry is not assignable to type null. The leaderboard data return type is mismatched.

🛠️ Implementation Requirements

• Fix the return type for the playground leaderboard endpoint
• Ensure proper typing of leaderboard data
• Remove @ts-nocheck from this file

🔧 Technical Specifications

TypeScript, Express.js

✅ Acceptance Criteria

• playground.routes.ts compiles without errors
• Playground leaderboard API returns data correctly

🎓 Difficulty Level

Beginner

⏱️ Timeline

ETA: 1 hour

[dekaptain2]

@dekaptain2 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello, I'd like to work on this issue.

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[success-OG]

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

Helloo.. Can i work on this issue repo maintainer

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

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

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