Mekanism Addon Library 1.21.1-1.0.13

Fixes

Multi-Page GUI Item Transfer

Fixed item transfer behavior in MultiPageGui machines.

• Item bulk transfer no longer targets slots belonging to other pages.
• Quick-move / Shift-click transfers no longer interact with slots outside the currently active page.

This prevents items from being unintentionally moved into or out of slots that are not visible on the current page.