Other Useful HAL Surfaces

Domain	Source file	Highlights
Servo (Lamp only)	os/hal/routes/servo.py	/servo/aim, /servo/track, /servo/play
Emotion	os/hal/routes/emotion.py	/emotion/express — coordinated servo + LED + display
Scene	os/hal/routes/scene.py	/scene/reading, /scene/focus, …
Camera	os/hal/routes/camera.py	/camera/snap, /camera/enable, /camera/disable
Display (Lamp)	os/hal/routes/display.py	/display/text, /display/eye
Face recognition	os/hal/routes/face.py	Enroll / list / remove