[Frontend] TokenStep token cards convey selection only visually - no radio/aria-checked semantics

[grantfox-oss]

Telegram (ask questions / claim the issue here first): https://t.me/+DOylgFv1jyJlNzM0

Why this matters

frontend/src/components/stream-creation/TokenStep.tsx:31-66 - each token is a plain button whose selected state is shown only via border color + a decorative check SVG. There is no role=radio/aria-checked or aria-pressed, and the group has no role=radiogroup. A screen-reader user cannot tell which token is currently selected, so they can submit a stream in the wrong asset.

Acceptance criteria

• Token options expose selected state to assistive tech (role=radio + aria-checked, or aria-pressed on the buttons)
• The container uses role=radiogroup with an accessible group label
• Selecting a token is announced as checked/selected by screen readers
• Validation error is associated with the group via aria-describedby

Files to touch

• frontend/src/components/stream-creation/TokenStep.tsx

Out of scope

• TemplateStep card styling
• Keyboard arrow-key navigation between options

[lekanay2005-coder]

@lekanay2005-coder has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

pls i will like to work on it

ℹ️ Repo Maintainers: To accept this application, review their application or assign @lekanay2005-coder to this issue.

[d3v-active]

@d3v-active has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Please assign . you will get a pr today

ℹ️ Repo Maintainers: To accept this application, review their application or assign @d3v-active to this issue.

[drips-wave]

Congratulations, @d3v-active! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @d3v-active: 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 🌊