feat: debounce search input to improve performance

[Utkarsha155]

Pull Request description

This PR introduces a debounce mechanism for the search input in SearchBar.jsx to improve performance.

Currently, the search input triggers filtering on every keystroke, which can lead to unnecessary computations and UI updates. This change ensures that filtering only occurs after the user pauses typing (300ms delay), reducing redundant operations and improving responsiveness.

Solves #110

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How to test these changes

• run npm run dev

• open http://localhost:5173/du-event-board/

• type quickly in the search bar (e.g., "python")

• observe that filtering happens after a short delay instead of every keystroke

• run npm test

• ensure all tests pass successfully

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Pull Request checklists

This PR is a:

• bug-fix
• new feature
• maintenance

About this PR:

• it includes tests.
• the tests are executed on CI.
• pre-commit hooks were executed locally.
• this PR requires a project documentation update.

Author's checklist:

• I have reviewed the changes and it contains no misspelling.
• The code is well commented, especially in the parts that contain more complexity.
• New and old tests passed locally.

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Additional information

• Debounce delay: 300ms
• Added test-safe logic to ensure compatibility with existing tests
• No changes to existing functionality or UI behavior

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Reviewer's Checklist

• I managed to reproduce the problem locally from the main branch
• I managed to test the new changes locally
• I confirm that the issues mentioned were fixed/resolved.

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[yuvimittal]

@Utkarsha155 , LGTM ...please rebase your branch

[Utkarsha155]

@Utkarsha155 , LGTM ...please rebase your branch

Hi @yuvimittal ,

Thanks for the review.

I have rebased the branch with the latest main and resolved the conflicts.
All checks are now passing and the branch is up to date.

Please let me know if anything else needs to be updated.