View the figure from a slight elevation and refine the leg-machine rollers

The default camera pitches down 10 degrees, so the floor reads as a
plane (drawn as a rectangle) and near/far contacts straddle it.
Elevation is pure presentation - IK pins solve in the flat authored
view and the posed body tilts, the same pattern as the orbit, so
authored canvas targets never go out of reach. The leg-extension
roller moves up onto the shin above the ankle and the leg-curl roller
tucks under the heel. Fixtures and reference test values regenerated
for the pitched camera.

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

Exercise Library/Hollow Body Hold/frames/frame-1.svg

@@ -1,14 +1,14 @@
 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 320 180" fill="none">
   <title>Hollow Body Hold</title>
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-  <path id="leg_l" d="M 191.0 150.0 L 237.0 150.0 L 277.0 150.0 L 277.0 139.0" stroke="#a9afba" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
-  <path id="girdle" d="M 106.0 150.0 L 100.0 148.0 L 100.0 148.0" stroke="#0d9488" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
-  <path id="pelvisBar" d="M 191.0 150.0 L 185.0 148.0 L 185.0 148.0" stroke="#0d9488" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
+  <rect x="16" y="150.8" width="288" height="10.4" rx="3" fill="none" stroke="#b9bec9" stroke-width="3"/>
+  <path id="leg_l" d="M 190.9 148.8 L 236.9 148.8 L 276.9 148.8 L 276.9 137.9" stroke="#a9afba" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
+  <path id="girdle" d="M 105.9 148.1 L 100.0 148.0 L 100.0 149.9" stroke="#0d9488" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
+  <path id="pelvisBar" d="M 190.9 148.8 L 185.0 148.0 L 185.0 149.2" stroke="#0d9488" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
   <path id="spine" d="M 185.0 148.0 Q 141.5 148.0 100.0 148.0" stroke="#0d9488" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
-  <path id="leg_r" d="M 185.0 148.0 L 231.0 148.0 L 271.0 148.0 L 271.0 137.0" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
-  <path id="arm_r" d="M 100.0 148.0 L 70.0 148.0 L 40.0 148.0" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
-  <circle id="head" cx="80.4" cy="143.8" r="10" fill="white" stroke="#3a3f4b" stroke-width="6"/>
-  <line id="nose" x1="80.4" y1="133.8" x2="80.4" y2="126.8" stroke="#3a3f4b" stroke-width="4" stroke-linecap="round"/>
+  <path id="leg_r" d="M 185.0 149.2 L 231.0 149.2 L 271.0 149.2 L 271.0 138.4" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
+  <path id="arm_r" d="M 100.0 149.9 L 70.0 149.9 L 40.0 149.9" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
+  <circle id="head" cx="80.4" cy="143.9" r="10" fill="white" stroke="#3a3f4b" stroke-width="6"/>
+  <line id="nose" x1="80.4" y1="133.9" x2="80.4" y2="127.0" stroke="#3a3f4b" stroke-width="4" stroke-linecap="round"/>
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     <text x="243" y="20">near</text>