Ship the 47-exercise library in-app: export, fixtures, tests, docs

render.py --export bundles the 25 new motion rigs and info pages;
figure-fixtures.json regenerated for all 47 (the Swift solver reproduces
every new motion, including negative-y pins and the new prop uses). The
fixture count assertion moves to 47, and the no-bundled-motion test now
uses Treadmill - a permanent COVERAGE.md exclusion - since Bench Press
exists. 48 tests green; watch target builds. Coverage handoff complete -
TODO-coverage.md retired.

Claude-Session: https://claude.ai/code/session_01HJDQQDA9QdP8zByg43H5v3

Workouts/Resources/ExerciseMotions/Pull-Up.info.md

@@ -0,0 +1,37 @@
+# Pull-Up
+
+The vertical pull — from a dead hang, pull the chin over the bar and
+lower all the way back down.
+
+- **Category:** Main circuit
+- **Type:** Bodyweight vertical pull
+- **Targets:** Lats, biceps, mid-back, grip
+- **Prescription:** 3 × as many strict reps as possible
+
+## Setup
+
+Grip the bar just outside shoulder-width, palms away. Hang with straight
+arms, shoulders active (pulled slightly down), knees bent or legs long.
+
+## Execution
+
+1. Drive the elbows down toward the ribs to pull the body up.
+2. Chin clears the bar — chest toward it, not chin poking over.
+3. Lower with control to a full dead hang every rep.
+
+## Cues
+
+- Start every rep from straight arms; half hangs don't count.
+- Think "elbows to pockets", not "chin to bar".
+- Quiet body — no swinging or kicking.
+
+## Common Mistakes
+
+- Kipping and swinging for extra reps.
+- Stopping the descent halfway.
+- Shrugging the shoulders to the ears at the top.
+
+## Progression
+
+Use the assisted pull-up machine or a band until 5 strict reps come
+easily; then add reps, then hang weight from a belt.