Kheil-Z

docs: add differentiability warning for Warp with mode='nearest'

3

Fixes #8540 . ### Description This PR updates the docstring of monai.networks.blocks.Warp to clarify that mode='nearest' results in zero gradients almost everywhere, effectively blocking gradient flow in registration training. ###...

WIP: optional moving_seg/fixed_seg support in VoxelMorph.forward

1

Fixes #8540 . ### Description This is a work-in-progress PR to extend VoxelMorph.forward for optional label (moving_seg, fixed_seg, keypoints) support, enabling semi-supervised deformable image registration. ### Current State No functional...