Give the figure real girdles, fix orbit pinning, add roller pads

Shoulder and pelvis widths grow to human-like proportions per profile
(shoulders wider than hips for neutral/male, reversed for female) and
are now drawn — bars across the attach points that read near-full-width
face-on and as a shoulder/hip nub in profile, so limbs visibly hang
from a torso instead of a point. Orbiting no longer re-solves IK pins
in the rotated view (pins are canvas targets in the authored camera):
the pose resolves first and the posed body rotates, which fixes hands
sticking to stale screen points mid-orbit (Cat-Cow, Bird Dog, Plank).
Leg Extension and Leg Curl swap their ankle bars for a machine roller
disc — a new `roller` prop riding the shin's press side. Fixtures
regenerated; both renderers updated in lockstep.

Claude-Session: https://claude.ai/code/session_01LEoff8bXGBS83tK1c55Mf7

Exercise Library/Lat Pull Down/frames/frame-1.svg

@@ -7,9 +7,11 @@
   <path d="M 272.0 19.0 L 196.0 2.0" stroke="#c5cad4" stroke-width="4" stroke-linecap="round" stroke-linejoin="round"/>
   <path id="arm_l" d="M 153.7 39.1 L 181.7 28.2 L 198.0 3.0" stroke="#86cfc5" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
   <path id="leg_l" d="M 156.0 124.0 L 200.2 111.1 L 197.0 151.0 L 208.0 151.9" stroke="#a9afba" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
+  <path id="girdle" d="M 153.7 39.1 L 147.7 37.1 L 147.7 37.1" stroke="#3a3f4b" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
+  <path id="pelvisBar" d="M 156.0 124.0 L 150.0 122.0 L 150.0 122.0" stroke="#3a3f4b" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
   <path id="spine" d="M 150.0 122.0 Q 146.6 78.6 147.7 37.1" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
-  <path id="arm_r" d="M 147.7 37.1 L 174.8 24.0 L 194.0 1.0" stroke="#0d9488" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
   <path id="leg_r" d="M 150.0 122.0 L 194.4 110.0 L 193.0 150.0 L 204.0 150.4" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
+  <path id="arm_r" d="M 147.7 37.1 L 174.8 24.0 L 194.0 1.0" stroke="#0d9488" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
   <path d="M 172.0 2.0 L 220.0 2.0" stroke="#6b7180" stroke-width="4" stroke-linecap="round" stroke-linejoin="round"/>
   <circle id="head" cx="149.5" cy="17.1" r="10" fill="white" stroke="#3a3f4b" stroke-width="6"/>
   <line id="nose" x1="155.2" y1="8.9" x2="159.2" y2="3.2" stroke="#3a3f4b" stroke-width="4" stroke-linecap="round"/>