1. Player.js — Added optional chaining (gamepad?.on/gamepad?.off) to prevent null crash
2. GamepadProvider.tsx — Toast messages now use t('GAMEPAD_CONNECTED') / t('GAMEPAD_DISCONNECTED') via i18next, added keys to en-US.json
3. useVerticalNavGamepadNavigation.tsx — Fixed event.nativeEvent?.spatialNavigationPrevented → event.spatialNavigationPrevented (native DOM events don't have nativeEvent)
4. GamepadProvider.tsx — Changed connectedGamepads from useState to useRef to avoid rAF effect restart cycle, removed it from effect deps, simplified the enabled guard