Client Caching and Offline Persistence Questions

Client side caching and local data persistence strategies for applications, including in memory caches, disk based caches, and mobile platform storage options. Cover offline first design patterns where apps remain usable without network connectivity, synchronization and conflict resolution protocols for syncing local changes back to servers, eventual consistency and freshness trade offs, schema migrations and versioning for local stores, pagination and handling large data sets under device constraints, and platform specific considerations such as iOS (UserDefaults, Core Data, Realm, NSCache) and Android (SharedPreferences, SQLite, Room, Realm). Also include strategies for synchronizing state across views and components, background sync, and strategies to minimize data loss and reduce sync conflicts.