🐛 Bug Fix
- Table / Cell selection: dragging and dropping the contents of several table cells into another cell threw
TypeError: Cannot read properties of undefined (reading 'Infinity'). When the drag left a stale selection anchor and the drop target was no longer part of the table's formal matrix,getSelectedBoundreturned itsInfinitysentinel and__onStopSelectiondereferenced an out-of-range matrix slot. It now bails out gracefully when the selected cells can't be resolved in the table. Fixes #1357.