import Foundation public struct ZaiSettingsReader: Sendable {    private static let log = CodexBarLog.logger(LogCategories.zaiSettings)     public static let apiTokenKey = "Z_AI_API_KEY"    public static let apiHostKey = "Z_AI_API_HOST"    public static let quotaURLKey = "Z_AI_QUOTA_URL"     public static func apiToken(        environment: [String: String] = ProcessInfo.processInfo.environment) -> String?    {        if let token = self.cleaned(environment[apiTokenKey]) { return token }        return nil    }     public static func apiHost(        environment: [String: String] = ProcessInfo.processInfo.environment) -> String?    {        self.cleaned(environment[self.apiHostKey])    }     public static func quotaURL(        environment: [String: String] = ProcessInfo.processInfo.environment) -> URL?    {        guard let raw = self.cleaned(environment[quotaURLKey]) else { return nil }        if let url = URL(string: raw), url.scheme != nil {            return url        }        return URL(string: "https://\(raw)")    }     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 = String(value.dropFirst().dropLast())        }         value = value.trimmingCharacters(in: .whitespacesAndNewlines)        return value.isEmpty ? nil : value    }} public enum ZaiSettingsError: LocalizedError, Sendable {    case missingToken     public var errorDescription: String? {        switch self {        case .missingToken:            "z.ai API token not found. Set apiKey in ~/.codexbar/config.json or Z_AI_API_KEY."        }    }}