fix: add cursor-aware marketplace pagination

[Sammydz456]

closes #1044

Summary

Closes #

Contributor Checklist

• Tests were added or updated for the changed behavior.
• Impacted code meets the 95% coverage expectation, or the gap is explained.
• Accessibility was verified for UI changes, including keyboard flow, labels, focus states, and contrast.
• Documentation was updated, or no docs change is needed.
• npm run lint, npm test, and npm run build pass locally.

Review Notes

• Testing guidance: TESTING.md
• Accessibility guidance: docs/accessibility.md
• Contributor workflow: CONTRIBUTING.md

Security

• No secrets, wallet keys, .env files, or generated artifacts are included
• API or wallet trust-boundary changes are explained

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