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/Side Plank/frames/frame-2.svg

@@ -1,15 +1,15 @@
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   <title>Side Plank</title>
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-  <path id="arm_r" d="M 96.3 124.2 L 101.5 94.7 L 106.7 65.2" stroke="#a9afba" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
-  <path id="leg_r" d="M 180.0 139.0 L 225.3 147.0 L 264.7 153.9 L 262.8 164.8" stroke="#a9afba" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
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-  <path id="leg_l" d="M 174.0 137.0 L 219.3 145.0 L 258.7 151.9 L 256.8 162.8" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
-  <path id="arm_l" d="M 90.3 122.2 L 90.0 152.2 L 60.0 152.0" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
-  <circle id="head" cx="70.6" cy="118.8" r="10" fill="white" stroke="#3a3f4b" stroke-width="6"/>
-  <line id="nose" x1="60.6" y1="118.8" x2="53.6" y2="118.8" stroke="#3a3f4b" stroke-width="4" stroke-linecap="round"/>
+  <rect x="16" y="150.8" width="288" height="10.4" rx="3" fill="none" stroke="#b9bec9" stroke-width="3"/>
+  <path id="leg_r" d="M 179.9 137.8 L 225.2 145.6 L 264.6 152.5 L 262.7 163.1" stroke="#a9afba" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
+  <path id="arm_r" d="M 96.2 122.5 L 101.4 93.4 L 106.6 64.3" stroke="#a9afba" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
+  <path id="girdle" d="M 90.3 124.4 L 90.3 122.5 L 96.2 122.5" stroke="#0d9488" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
+  <path id="pelvisBar" d="M 174.0 138.2 L 174.0 137.0 L 179.9 137.8" stroke="#0d9488" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
+  <path id="spine" d="M 174.0 137.0 Q 131.2 129.6 90.3 122.5" stroke="#0d9488" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
+  <path id="leg_l" d="M 174.0 138.2 L 219.3 146.1 L 258.7 152.9 L 256.8 163.6" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
+  <path id="arm_l" d="M 90.3 124.4 L 90.0 153.9 L 60.0 153.7" stroke="#3a3f4b" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
+  <circle id="head" cx="70.6" cy="119.0" r="10" fill="white" stroke="#3a3f4b" stroke-width="6"/>
+  <line id="nose" x1="60.6" y1="119.0" x2="53.6" y2="119.0" stroke="#3a3f4b" stroke-width="4" stroke-linecap="round"/>
   <g font-family="-apple-system, Helvetica, sans-serif" font-size="11" fill="#6b7180">
     <line x1="224" y1="16" x2="238" y2="16" stroke="#3a3f4b" stroke-width="4" stroke-linecap="round"/>
     <text x="243" y="20">near</text>