a11y: key={index} undermines screen-reader stability across list mutations

[nanaf6203-bit]

Summary

Several files use key={index} on lists where stable ids exist (see issue #7); this is also an a11y concern for screen reader announcements because React reconciliation cycles can jumble element ids.

Affected area

Same as #7.

Steps to reproduce

Filter a list, observe that screen reader announces cleared content in unexpected orders.

Expected behaviour

Use stable identifiers.

Acceptance criteria

• Covers every file listed in Implement Responsive and Accessible Navigation Bar #7.
• VoiceOver/NVDA smoke test added.

[Kayce10]

@Kayce10 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello Sir,

I came across your project and will love to have the opportunity to work on it

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Kayce10 to this issue.

[Moonwalker-rgb]

@Moonwalker-rgb has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

HI Maintainer

If the issue is available,
I’d be happy to take ownership and submit a PR for review.

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

[drips-wave]

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

🧑‍💻 @Moonwalker-rgb: 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 🌊

[drips-wave]

This issue has been completed by @Moonwalker-rgb as part of the Stellar Wave Program's 6th Wave 🥳

😎 @Moonwalker-rgb: 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.

🧑‍💻 Repo maintainers: How'd the contributor do? Leave a review to share your experience working with them.