this.swUpdate.versionUpdates.subscribe((event: VersionEvent) => {
      switch (event.type) {
        case 'VERSION_DETECTED':
          console.log('New version detected:', event.version.hash);
          break;
          
        case 'VERSION_READY':
          console.log('New version ready:', event.latestVersion.hash);
          // Optionally show update available notification
          break;
          
        case 'VERSION_INSTALLATION_FAILED':
          console.error('Version installation failed:', event.error);
          break;
          
        case 'VERSION_FAILED':
          // NEW: Handle version failure
          this.handleVersionFailure(event);
          break;
          
        case 'NO_NEW_VERSION_DETECTED':
          console.log('No new version available');
          break;
      }