Hide Orbital Fat (class 6) by default in 3D view

Fix 3D: rotate right 90 only (no flip), fix camera up vector

Fix 3D upside-down (rot90+flipud) and opacity slider refresh

Fix slice slider hidden by overflow: add min-height:0 and flex-shrink:0

Move 3D View button inside OverlayControls below Overlay

Fix 3D orientation, brighten eyeball color, view from front

Fix 3D mesh orientation: rotate left 90° to undo preprocessing rotation

Add pseudo-3D visualization with marching cubes and Three.js

Add 3D volume calculation, L/R split statistics, and Excel export

Add app and GitHub URLs to README

Fix: serve frontend index.html at root instead of API JSON

Add libxcb1 system dependency for OpenCV headless

Track .nii.gz files with Git LFS

Switch deployment target to Hugging Face Spaces

Initial commit: MRI segmentation SaaS with Render deployment