Create core/ directory with platform-agnostic sandbox components:
- Timer manager, JSON API, Crypto API, Virtual FS
- Lua sandbox, Permission gate, Audit log, Rate limiter
- Platform abstraction interfaces (IAssetInterface, IFilesystemInterface)
- Platform-agnostic logger with Android/Desktop implementations
Update designer to link against mosis-core library instead of
including sandbox sources directly.
This is the foundation for unifying the Android service and
desktop designer to share the same codebase.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>