- Register sandbox APIs (timer, JSON, crypto, VFS) into RmlUi's Lua state
- Add switchAppSandbox() function for context switching between apps
- Update goHome() to reset sandbox context when returning home
- Fix icon loading for third-party apps (handle full paths vs relative)
- Mirror changes between Android service (kernel.cpp) and desktop designer
This enables third-party apps to use sandbox APIs when running in RmlUi.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>