import Foundation /// Reads OpenRouter settings from environment variablespublic enum OpenRouterSettingsReader {    /// Environment variable key for OpenRouter API token    public static let envKey = "OPENROUTER_API_KEY"     /// Returns the API token from environment if present and non-empty    public static func apiToken(environment: [String: String] = ProcessInfo.processInfo.environment) -> String? {        self.cleaned(environment[self.envKey])    }     /// Returns the API URL, defaulting to production endpoint    public static func apiURL(environment: [String: String] = ProcessInfo.processInfo.environment) -> URL {        if let override = environment["OPENROUTER_API_URL"],           let url = URL(string: cleaned(override) ?? "")        {            return url        }        return URL(string: "https://openrouter.ai/api/v1")!    }     static func cleaned(_ raw: String?) -> String? {        guard var value = raw?.trimmingCharacters(in: .whitespacesAndNewlines), !value.isEmpty else {            return nil        }         if (value.hasPrefix("\"") && value.hasSuffix("\"")) ||            (value.hasPrefix("'") && value.hasSuffix("'"))        {            value.removeFirst()            value.removeLast()        }         value = value.trimmingCharacters(in: .whitespacesAndNewlines)        return value.isEmpty ? nil : value    }}