## Summary
- Added `flex: 1` to `StyledColumnContainer` in `RecordBoardColumns.tsx`
- The column wrapper wasn't stretching vertically, so the droppable area
only covered the top of each column where cards existed
- Now the entire column height is a valid drop target
## Test plan
- [ ] Open a board/kanban view
- [ ] Drag a card from one column
- [ ] Drop it in the lower/empty area of another column
- [ ] Verify the drop registers correctly
Fixes#18842
Yassir S.
61720470c5