BE-20: Add integration tests for WebSocket endpoints using `actix-web` test helpers

[chinweobtagaz]

Context: The WebSocket logic for game moves relies on manual QA. Regressions easily slip in.
Location: backend/modules/api/src/ws.rs
Acceptance Criteria:

• Write an actix test::TestServer suite that connects a WS client and simulates a chess game.

[Henrichy]

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

Hi! I'd like to work on this issue.
I've contributed to Rust, TypeScript, backend, frontend, and smart contract projects, with a focus on delivering focused, well-tested changes. I'll keep the implementation within the requested scope, preserve existing behavior unless the issue requires otherwise, include the necessary tests and documentation, and submit a PR that's straightforward to review.
Portfolio: https://portfolio-sandy-alpha-29.vercel.app • ETA: ~2–4 hours.

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

[JesseJohn7]

@JesseJohn7 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Please assign me to this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @JesseJohn7 to this issue.

[bright5455]

@bright5455 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello maintainer

I have read and understand the issue
I can deliver in an hour
Please kindly assign the issue to me

Thank you

ℹ️ Repo Maintainers: To accept this application, review their application or assign @bright5455 to this issue.

[Salome-Agu]

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

Hello Maintainer, i can fix this issue

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

[Mike008-Div]

@Mike008-Div has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I'm writing with a slightly embarrassed but very honest request – please, please assign this issue to me. I know others could take it, but I am literally begging for this chance. I really, really need it. Please. I don't ask for much, but this one means everything to me right now. Don't make me beg more — my pride is already in pieces.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Mike008-Div to this issue.

[Henrichy]

@chinweobtagaz please assign to me. Would deliver in less than 2 hours

[drips-wave]

Congratulations, @JesseJohn7! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @JesseJohn7: 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 🌊