DS-009: Add elevation, border, and focus-ring tokens

[IbrahimIjai]

Complexity: Medium
Primary files: packages/ui/src/styles/globals.css

Define subtle separators, interactive borders, overlay shadows, and a clear
keyboard focus treatment that work on every surface.

Acceptance criteria

• Default, hover, active, and strong border roles exist.
• Overlay and floating-panel shadows work in both themes.
• Focus rings meet visible-focus guidance on all core surfaces.
• Tokens are documented with intended usage.

[aojomo]

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

Hi maintainer, Please I would like to work on this issue

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[theo372001]

@theo372001 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Can I work on this issue for you 🙏

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[dev-susa]

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

Hello, I would like to resolve this issue, I have the experience.

Looking forward to working with the team.

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

[drips-wave]

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

🧑‍💻 @dev-susa: 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.

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Official Campaign | FWC26 campaign!

@dev-susa's PR #479 was approved and merged by @IbrahimIjai.

🏆 @dev-susa: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (271 total points). Track your full progress on GrantFox.

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

[drips-wave]

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

😎 @dev-susa: 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.

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