import Foundation public enum QoderUsageError: LocalizedError, Sendable, Equatable {    case missingCredentials    case invalidCredentials    case apiError(Int)    case parseFailed(String)    case networkError(String)     public var isAuthRelated: Bool {        switch self {        case .missingCredentials, .invalidCredentials: true        case .apiError, .parseFailed, .networkError: false        }    }     public var errorDescription: String? {        switch self {        case .missingCredentials:            "Qoder session cookie not found. Sign in to qoder.com or qoder.com.cn in Chrome, or paste a Cookie header."        case .invalidCredentials:            "Qoder session is invalid or expired. Please sign in to Qoder again."        case let .apiError(status):            "Qoder API returned HTTP \(status)."        case let .parseFailed(message):            "Could not parse Qoder usage: \(message)"        case let .networkError(message):            "Qoder API error: \(message)"        }    }}