style(ui): give provider header icon surface visual definition with theme border

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
Co-authored-by: Lucenx9 <185146821+Lucenx9@users.noreply.github.com>
a4d141d304Simone committed on 10/11/2026, 3:21:34 PM· committed by GitHubparent504f535
2 files changedLine totals unavailable