Slowly orbit the camera around every form guide

With the equipment layer carrying world-space 3D form, the prop-free
gate comes off: machines now get the same slow orbit as the bodyweight
moves, their seats, cables, bars, and rollers turning with the figure.
Closes out the orbit-for-all-exercises plan.

Claude-Session: https://claude.ai/code/session_01HJDQQDA9QdP8zByg43H5v3

README.md

@@ -26,9 +26,10 @@ your own iCloud Drive.
 - **Animated form guide** — every library exercise shows a looping stick-figure
   demonstration on the run screen's bottom half, posed by real joint angles on an
   anatomical 3D skeleton (complete with feet) and rendered live from the Exercise
-  Library's rig data with the working limbs highlighted — machine exercises
-  include schematic equipment (seats, bars, cables, roller pads) that moves with
-  the figure, and face-on machines show true hip abduction and torso rotation.
+  Library's rig data with the working limbs highlighted — the camera slowly
+  orbits every exercise while it moves, machine equipment (seats, bars, cables,
+  roller pads) has world-space 3D form that turns with the figure, and face-on
+  machines show true hip abduction and torso rotation.
 - **Machine comfort settings** — machine-based exercises remember your setup
   (seat height, back-rest position, pin position, …), shown on the workout
   screen and editable mid-workout; changes save back to the split for next time.