The marker-relative servo (endpoints /api/grasp/visual_servo/{plan,step,
plane/*}, helpers in grasp_routes.py, the bulk of grasp/visual_servo.py,
web/servo.js, and the Servo Visuale GUI tab) is gone. Plane fitting now
lives in /api/work_plane/* and perception/work_plane.py; Task 5 wires the
new Calibrazione Piano tab.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>