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/Chest Press/frames/frame-1.svg

@@ -7,9 +7,11 @@
   <path d="M 108.0 151.0 L 138.0 151.0" stroke="#c5cad4" stroke-width="4" stroke-linecap="round" stroke-linejoin="round"/>
   <path id="arm_l" d="M 104.3 40.9 L 99.1 70.5 L 122.1 51.2" stroke="#86cfc5" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
   <path id="leg_l" d="M 122.0 124.0 L 166.5 112.3 L 162.0 152.0 L 172.9 153.2" stroke="#a9afba" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
+  <path id="girdle" d="M 104.3 40.9 L 98.3 38.9 L 98.3 38.9" stroke="#3a3f4b" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
+  <path id="pelvisBar" d="M 122.0 124.0 L 116.0 122.0 L 116.0 122.0" stroke="#3a3f4b" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
   <path id="spine" d="M 116.0 122.0 Q 104.0 80.1 98.3 38.9" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
-  <path id="arm_r" d="M 98.3 38.9 L 93.1 68.5 L 116.1 49.2" stroke="#0d9488" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
   <path id="leg_r" d="M 116.0 122.0 L 160.7 111.1 L 158.0 151.0 L 169.0 151.7" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
+  <path id="arm_r" d="M 98.3 38.9 L 93.1 68.5 L 116.1 49.2" stroke="#0d9488" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
   <path d="M 119.1 58.2 L 119.1 42.2" stroke="#6b7180" stroke-width="4" stroke-linecap="round" stroke-linejoin="round"/>
   <circle id="head" cx="100.4" cy="19.0" r="10" fill="white" stroke="#3a3f4b" stroke-width="6"/>
   <line id="nose" x1="110.4" y1="18.2" x2="117.3" y2="17.5" stroke="#3a3f4b" stroke-width="4" stroke-linecap="round"/>

Exercise Library/Chest Press/frames/frame-2.svg

@@ -7,9 +7,11 @@
   <path d="M 108.0 151.0 L 138.0 151.0" stroke="#c5cad4" stroke-width="4" stroke-linecap="round" stroke-linejoin="round"/>
   <path id="arm_l" d="M 104.3 40.9 L 134.1 44.1 L 163.2 51.3" stroke="#86cfc5" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
   <path id="leg_l" d="M 122.0 124.0 L 166.5 112.3 L 162.0 152.0 L 172.9 153.2" stroke="#a9afba" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
+  <path id="girdle" d="M 104.3 40.9 L 98.3 38.9 L 98.3 38.9" stroke="#3a3f4b" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
+  <path id="pelvisBar" d="M 122.0 124.0 L 116.0 122.0 L 116.0 122.0" stroke="#3a3f4b" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
   <path id="spine" d="M 116.0 122.0 Q 104.0 80.1 98.3 38.9" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
-  <path id="arm_r" d="M 98.3 38.9 L 128.1 42.1 L 157.2 49.3" stroke="#0d9488" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
   <path id="leg_r" d="M 116.0 122.0 L 160.7 111.1 L 158.0 151.0 L 169.0 151.7" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
+  <path id="arm_r" d="M 98.3 38.9 L 128.1 42.1 L 157.2 49.3" stroke="#0d9488" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
   <path d="M 160.2 58.3 L 160.2 42.3" stroke="#6b7180" stroke-width="4" stroke-linecap="round" stroke-linejoin="round"/>
   <circle id="head" cx="100.4" cy="19.0" r="10" fill="white" stroke="#3a3f4b" stroke-width="6"/>
   <line id="nose" x1="110.4" y1="18.2" x2="117.3" y2="17.5" stroke="#3a3f4b" stroke-width="4" stroke-linecap="round"/>