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

Workouts/ExerciseFigure/ExerciseFigureView.swift

@@ -35,16 +35,14 @@ struct FigureAnimation {
         self.props = resources.motion.props ?? []
     }
 
-    /// Seconds per full camera revolution for orbiting motions.
+    /// Seconds per full camera revolution.
     private static let orbitPeriod: Double = 24
 
-    /// Prop-free motions slowly orbit the camera while animating — the bodyweight
-    /// moves. Machines keep their fixed camera until their equipment rotates too.
-    var orbits: Bool { props.isEmpty }
-
     /// Drawable geometry at `time` — the figure plus the resolved equipment layers.
+    /// Every motion slowly orbits the camera while animating: the equipment has
+    /// world-space 3D form and rotates with the figure, so machines turn too.
     func geometry(at time: Double) -> FigureGeometry {
-        let yaw = orbits ? 360 * (time / Self.orbitPeriod) : 0
+        let yaw = 360 * (time / Self.orbitPeriod)
         return timeline.geometry(at: time, yawOffset: yaw, props: props)
     }
 }