fix: add empty state for search results panel

[saurabhhhcodes]

When search returns no results, show a friendly empty state with an icon and helpful message instead of 'No results' text.

[saurabhhhcodes]

I'd like to work on this — contributing under GSSoC'26

[saurabhhhcodes]

I'd like to work on this issue. Please assign it to me.

[saurabhhhcodes]

/assign

[github-actions]

Hi @saurabhhhcodes, this issue has been successfully assigned to you! 🎉

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