feat: highlight matched items for sidebar search

[hezhizhen]

Summary

Highlight matched items for sidebar search.

Submission

• This PR is a bug fix or small-scope improvement.
• If this PR is not a bug fix or small-scope improvement, I linked an approved feedback item below.
• I have read and followed CONTRIBUTING.md.
• I tested this change locally.
• I added or updated tests when reasonable.

Approved feedback item (required if not a bug fix or small-scope improvement):

Related

[hezhizhen]

Code review

Found 1 issue:

1. The SidebarInnerItem name rendering replaces the git-status-aware <div> (with conditional text-info, text-success, text-danger classes based on gitWorktreeStatus) that was added in PR Add live git status indicators #458 with a plain <HighlightedName> wrapper. Merging this PR after rebasing onto main will silently drop the git status visual indicators unless the HighlightedName wrapper or its parent <div> incorporates the git status coloring logic.

yaak/apps/yaak-client/components/Sidebar.tsx

Lines 858 to 861 in b82f292

	<div className="flex items-center gap-2 min-w-0 h-full w-full text-left">
	<div className="truncate">
	<HighlightedName name={resolvedModelName(item)} />
	</div>

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