/// Keys used for values persisted in [SharedPreferences].
///
/// Centralised here so the auth flow, the network layer and the router all
/// agree on the same key. Renaming a key in one place would otherwise silently
/// diverge from the others (e.g. the interceptor's defensive logout fallback).
class PrefKeys {
  PrefKeys._();

  static const String bearer = 'bearer';
  static const String refreshToken = 'refresh_token';
  static const String customerData = 'customer_data';

  /// Fingerprint (hash of the company's document ids + website) of the last
  /// profile version we triggered AI onboarding for. Lets us skip redundant
  /// `POST /api/v1/onboarding` calls until the company's data actually changes.
  static const String onboardingFingerprint = 'ai_onboarding_fingerprint';

  /// Epoch milliseconds when AI onboarding was last started. Used by the
  /// Recommended tab to show a "still learning" hint for a short grace period.
  static const String onboardingStartedAt = 'ai_onboarding_started_at';
}