If seeding fails or you see "client is offline" errors, your Firestore rules are blocking reads/writes. Go to Firebase Console → Firestore → Rules and paste these rules:

rules_version = '2';
service cloud.firestore {
  match /databases/{database}/documents {
    match /{document=**} {
      allow read, write: if request.auth != null;
    }
  }
}

Populate all 7 products, 7 channels, and opening inventory from your first shipment. Run once only.