feat(ui): Poll for new incoming challenges

[Akinbola247]

Do not break existing flows: passkey wallet, ZK commit/reveal/resolve, challenge-by-username, and leaderboard reads must keep working.

#10 Poll for new incoming challenges

Labels: frontend, enhancement
Problem: Opponent’s challenge appears only after manual refresh.

Task: setInterval 30s call loadChallenges when wallet connected; optional subtle badge on “Incoming”.

Files: ClashZkArena.tsx (loadChallenges callback)

Done when: New challenge surfaces within poll window; no extra txs.

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Contributor setup (all issues)

git clone <repo> && cd Stellar-Game-Studio
cp .env.example .env          # root .env — Vite reads from here
cd clash-frontend && npm install && npm run dev   # http://localhost:3000

Need	Command
Local contracts + full .env	bun run setup (repo root)
Rebuild clash WASM	bun run build clash
Regenerate TS bindings	bun run bindings clash
Contract tests	cargo test -p clash

Key paths: clash-frontend/src/games/clash/ (arena UI), contracts/clash/, contracts/mock-game-hub/, clash-frontend/src/services/pointsService.ts

[Elizabeth-dev270]

I would like to work on this

[grantfox-oss]

🦊 GrantFox — @Elizabeth-dev270 has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #11)
2. Your PR will be reviewed by the Clash-studio maintainers

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