import AppKitimport CodexBarCoreimport Foundation struct SyntheticProviderImplementation: ProviderImplementation {    let id: UsageProvider = .synthetic     @MainActor    func presentation(context _: ProviderPresentationContext) -> ProviderPresentation {        ProviderPresentation { _ in "api" }    }     @MainActor    func observeSettings(_ settings: SettingsStore) {        _ = settings.syntheticAPIToken    }     @MainActor    func isAvailable(context: ProviderAvailabilityContext) -> Bool {        if SyntheticSettingsReader.apiKey(environment: context.environment) != nil {            return true        }        context.settings.ensureSyntheticAPITokenLoaded()        return !context.settings.syntheticAPIToken.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty    }     @MainActor    func settingsFields(context: ProviderSettingsContext) -> [ProviderSettingsFieldDescriptor] {        [            ProviderSettingsFieldDescriptor(                id: "synthetic-api-key",                title: "API key",                subtitle: "Stored in ~/.codexbar/config.json. Paste the key from the Synthetic dashboard.",                kind: .secure,                placeholder: "Paste key…",                binding: context.stringBinding(\.syntheticAPIToken),                actions: [],                isVisible: nil,                onActivate: { context.settings.ensureSyntheticAPITokenLoaded() }),        ]    }}