/// Identify whether a base_url points at an OpenAI-compatible root (".../v1").pub(crate) fn is_openai_compatible_base_url(base_url: &str) -> bool {    base_url.trim_end_matches('/').ends_with("/v1")}/// Convert a provider base_url into the native Ollama host root./// For example, "http://localhost:11434/v1" -> "http://localhost:11434".pub fn base_url_to_host_root(base_url: &str) -> String {    let trimmed = base_url.trim_end_matches('/');    if trimmed.ends_with("/v1") {        trimmed            .trim_end_matches("/v1")            .trim_end_matches('/')            .to_string()    } else {        trimmed.to_string()    }}#[cfg(test)]mod tests {    use super::*;    #[test]    fn test_base_url_to_host_root() {        assert_eq!(            base_url_to_host_root("http://localhost:11434/v1"),            "http://localhost:11434"        );        assert_eq!(            base_url_to_host_root("http://localhost:11434"),            "http://localhost:11434"        );        assert_eq!(            base_url_to_host_root("http://localhost:11434/"),            "http://localhost:11434"        );    }}