Usage previews rendered the matched occurrence through tokenSpans, so the token colour rules outranked the inherited --fg-search-match and left syntax colours on the search-match background (about 1.1:1 in Islands Light). Render the match as plain text so it takes the search-match foreground; syntax colours stay on the surrounding code. Covered by unit tests and a Playwright contrast check across light, dark, high-contrast and mixed editor schemes.
Fixes#851
Co-authored-by: kkMihai <59262001+kkMihai@users.noreply.github.com>
