[FE-19] Build DocumentSearchBar component

[mftee]

Problem

There is no search input in the document list. Users with many documents must scroll through paginated results to find a specific one, with no way to filter by keyword.

Proposed Solution

Create a DocumentSearchBar component inside frontend/module/components/document-search/ that provides a debounced live search experience.

Acceptance Criteria

• Renders a text input with a search icon and a clear (X) button that appears when the input has a value
• Debounces input by 350ms before triggering a search to avoid excessive API calls
• Calls GET /api/module/documents/search?q= with the current input value and passes results back via an onResults callback prop
• Shows a loading spinner inside the input while the search request is in flight
• Shows a No results found message when the API returns an empty array
• Clears results and resets state when the clear button is clicked or the input is emptied
• Is fully keyboard accessible — search triggers on Enter, clear triggers on Escape
• All component files live inside frontend/module/components/document-search/

[demilade18-git]

@demilade18-git has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hello,

I'd be happy to work on this issue.

I took some time to review the task and it looks like a good fit for my experience. I enjoy contributing to open-source projects, following established patterns, and making sure changes are well-tested and easy to maintain.

If the issue is still open, I'd appreciate the opportunity to contribute.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @demilade18-git to this issue.

[drips-wave]

Congratulations, @demilade18-git! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @demilade18-git: 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 @demilade18-git as part of the Stellar Wave Program's 5th Wave 🥳

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