- Present paywall only on save/connect because PurchaseRequiredButton
instances were presenting paywalls with partial requirements
- Retain PurchaseRequiredButton just to flag paid features visually, but
do nothing on tap
- Suggest paywall products via IAPManager and required features, rather
than from views
- Handle .sharing/.appleTV requirements in ProfileCoordinator, rather
than in StorageSection
- Discontinue platform purchases, but treat as full if iOS + macOS