Add keyboard-first search overlay with Cmd+K trigger

[Akatenvictor]

What

Implement a search overlay accessible from the header that provides instant search across tracks, artists, and collections with keyboard-first interaction.

Why

There is currently no search functionality exposed in the UI. Users need a fast way to find specific audio content without browsing through sections. A keyboard-triggered overlay keeps the experience fluid.

Scope

In: Search overlay with Cmd+K trigger, debounced input, result grouping by type, keyboard navigation of results
Out: Search analytics, search filters/sorting, voice search

Acceptance Criteria

• Cmd+K or Ctrl+K opens the search overlay from any page
• Results grouped into Tracks, Artists, Collections sections
• Arrow keys navigate results, Enter selects, Escape closes
• Minimum 200ms debounce on API calls
• Overlay has backdrop blur and focus trap

Technical Context

• New SearchOverlay component in components/ui/
• New useSearch hook calling exploreService
• Should integrate with existing NftCollections and artist data

[Ghostcecode]

@Ghostcecode has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi, I've taken the time to go through the requirements and I'm confident I can put together a solution that satisfies the acceptance criteria. I'd be grateful if this could be assigned to me.

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

[wagmiiii]

@wagmiiii has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

pls assign to me

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

[drips-wave]

Congratulations, @wagmiiii! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @wagmiiii: 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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[drips-wave]

This issue has been completed by @wagmiiii as part of the Stellar Wave Program's 8th Wave 🥳

😎 @wagmiiii: 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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