Add creator card keyboard shortcut hint for quick buy

[Chucks1093]

Summary
Add creator card keyboard shortcut hint for quick buy

Scope

• add an unobtrusive keyboard shortcut hint on creator cards\n- document intended shortcut behavior in UI copy\n- keep mobile UX unchanged

Acceptance Criteria

• scoped change is implemented with no unrelated file churn
• docs/tests are updated where applicable
• contributor can validate the outcome locally

Contributor coordination: if you pick this up, reach out in Telegram for updates or clarification: https://t.me/accesslayerorg

[Peolite001]

@Peolite001 has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

I would love to work on this issue.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Peolite001 to this issue.

[drips-wave]

Congratulations, @Peolite001! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on April 29, 2026.

🧑‍💻 @Peolite001: 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 🌊