- CallActivity no longer auto-starts a call on launch - CallViewModel lazily inits engine only when startCall() is called - nativeGetStats nullable return handled safely in Kotlin - Removed tracing_subscriber::fmt() which panics on Android (no stdout) - All JNI calls wrapped in try/catch on Kotlin side Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>