import CodexBarCoreimport Foundation struct GroqProviderImplementation: ProviderImplementation {    let id: UsageProvider = .groq     @MainActor    func presentation(context _: ProviderPresentationContext) -> ProviderPresentation {        ProviderPresentation { _ in "metrics" }    }     @MainActor    func observeSettings(_ settings: SettingsStore) {        _ = settings.groqAPIKey    }     @MainActor    func isAvailable(context: ProviderAvailabilityContext) -> Bool {        ProviderTokenResolver.groqToken(environment: context.environment) != nil ||            !context.settings.groqAPIKey.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty    }     @MainActor    func settingsFields(context: ProviderSettingsContext) -> [ProviderSettingsFieldDescriptor] {        [            ProviderSettingsFieldDescriptor(                id: "groq-api-key",                title: "API key",                subtitle: "Stored in ~/.codexbar/config.json. Metrics require Groq Enterprise Prometheus access.",                kind: .secure,                placeholder: "gsk_...",                binding: context.stringBinding(\.groqAPIKey),                actions: [],                isVisible: nil,                onActivate: nil),        ]    }}