Ditch Electron: Securing Local Socket Communications using Opaque Tokens

The ERTH Architecture series addresses critical desktop app security and persistence. Part 3 focuses on securing local socket communications using Opaque Tokens to prevent port-scanning attacks and local socket hijacking within multi-process apps. Part 4 introduces a Local-First Sync Engine utilizing Turso and SQLModel. This implementation enables offline-first database schemas, UUIDv7 indexing, and cloud-edge SQLite replication, ensuring data persistence and synchronization without requiring heavy database engines like PostgreSQL on user laptops.