resendInventory causes errors if called when player has invui inventory open

Repro:
1. Open any InvUI inventory
2. Run /reloadlang (see https://github.com/pylonmc/pylon/pull/1066)
3. Error in console appears

<img width="1242" height="665" alt="Image" src="https://github.com/user-attachments/assets/f90736ae-e347-4468-ad03-3543db8c0765" />