Update set_step(), status bar mass display, and on_action_sud_new() to read grain_mass/water_mass from step['pot'] and use the new pot key structure when sending an empty Load document. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01T52JH848ojhXXHn1bAzdC3