[Frontend] Button loading state lacks aria-busy and accessible spinner label

[ogazboiz]

Telegram: https://t.me/+DOylgFv1jyJlNzM0

Why this matters

The shared Button (frontend/src/components/ui/Button.tsx) shows a spinner SVG when loading is true, but the button gets no aria-busy="true" and the spinner has no accessible name. Screen-reader users get no indication the action is in progress; the disabled state is conveyed but not the "loading" semantics. This affects every loading button in the app (create, withdraw, top-up, cancel).

Acceptance criteria

• Set aria-busy={loading} on the button
• Mark the spinner aria-hidden="true" and add an accessible loading indicator (e.g. visually-hidden "Loading" text) when loading
• No visual regression

Files to touch

• frontend/src/components/ui/Button.tsx

Out of scope

• Per-button copy changes.

[Michealshodipo56]

@Michealshodipo56 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I would like to work on this issue kindly assign me

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[Joycejay17]

@Joycejay17 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hey there maintainer, I am a software engineer with a lot of blockchain experience. I have read through the Issue description and with my experience in stellar projects can get this delivered ASAP.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Joycejay17 to this issue.

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Congratulations, @Joycejay17! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

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This issue has been completed by @Joycejay17 as part of the Stellar Wave Program's 5th Wave 🥳

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