refine search bar and make more customizable

[lindsayzhng]

Summary

Added some missing elements of the search bar and updated the styling to be more accurate.
Search items also now have right chevrons and you can add icons to the left side
Added params for classNames to inner items of the search modal for further customization

Test Plan

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Note

Low Risk
Primarily styling and Storybook changes with a small, additive API surface (SearchResult.icon, paddingTop) that may require downstream type updates but no behavioral/security impact.

Overview
Refines the Search UI/UX with updated Tailwind styling across SearchButton, the modal input/panel, and result rows (rounded corners, border/hover states), and adds an active-row right chevron indicator.

Extends the API to support per-result leading icons (SearchResult.icon) and introduces a new paddingTop prop to control top-positioned modal offset (replacing the fixed pt-16). Storybook is updated to demo icons and expose className/paddingTop controls and docs output.

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[k-finken]

🚢

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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