Function classify_plugins_search 

fn classify_plugins_search(
    search: Option<&str>,
    search_regex: bool,
) -> (Option<String>, Option<String>)

Plugins tab (name, manufacturer, path): (regex_pat, like_pat) — when regex_pat is Some, use REGEXP on all three columns; otherwise like_pat is fuzzy interleaved or invalid-regex fallback (same binding shape).