DS-058: Build a Collapsible disclosure primitive

[IbrahimIjai]

Context

Dense trading screens need optional details such as fee breakdowns and advanced
settings without the structure of a multi-item accordion.

Scope

• Add Collapsible, CollapsibleTrigger, and CollapsibleContent.
• Support controlled and uncontrolled state.
• Provide compact and default trigger layouts.
• Use tokenized motion with a reduced-motion fallback.

Acceptance criteria

• Trigger exposes aria-expanded and references its content.
• State works with keyboard and pointer input.
• Content can contain focusable controls without focus loss.
• No fixed height assumption clips dynamic content.
• Tests cover both state models and accessibility relationships.

Out of scope

• Persisting disclosure preferences.
• Creating feature-specific advanced settings.

[Talentgift24-ux]

@Talentgift24-ux has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I would love to work on this issue

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[samuelelijah585]

@samuelelijah585 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello, I've reviewed the issue and its acceptance criteria, and I'm confident I can deliver a solution that meets the requirements. I'd appreciate it if you could assign this issue to me. Thank you!

ℹ️ Repo Maintainers: To accept this application, review their application or assign @samuelelijah585 to this issue.

[Oluwatomilola]

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

Hi Maintainer.
I can fix this issue. kindly assign.

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

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

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox!

@Oluwatomilola's PR #503 was approved and merged by @IbrahimIjai.

🏆 @Oluwatomilola: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (519 total points). Track your full progress on GrantFox.

👏 Great work, @Oluwatomilola! Keep contributing to SO4-Markets.

[drips-wave]

This issue has been completed by @Oluwatomilola as part of the Stellar Wave Program's 7th Wave 🥳

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