What happened?

Pi is sending enable_thinking to zai. The correct parameter is thinking.type. As a result, thinking is always left as the default (enabled).

Steps to reproduce

1. Use the zai provider, thinking disabled. Send any message.
2. Notice that the model is thinking.

Expected behavior

Disabling thinking in pi should disable thinking.

Happy to send a PR to fix this, it's a 1-line change.

Version

master