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/Bodyweight Squat.info.md

@@ -0,0 +1,37 @@
+# Bodyweight Squat
+
+The unloaded squat — arms reach forward as a counterbalance while the hips
+sit down between the heels. The pattern every loaded squat is built on.
+
+- **Category:** Warm-up and main circuit
+- **Type:** Bodyweight squat
+- **Targets:** Quadriceps, glutes, mobility
+- **Prescription:** 3 × 15–20, or 10 slow reps as a warm-up
+
+## Setup
+
+Stand with feet shoulder-width, toes slightly turned out, arms relaxed at
+your sides.
+
+## Execution
+
+1. Reach the arms forward as the hips sit down and back.
+2. Descend as deep as comfortable — thighs at least parallel — heels flat.
+3. Stand back up tall and let the arms drop.
+
+## Cues
+
+- Knees track over the toes the whole way down and up.
+- Chest up; the arms reaching forward keep you from tipping.
+- Slow down — a three-second descent teaches control.
+
+## Common Mistakes
+
+- Heels lifting at the bottom.
+- Knees diving inward.
+- Shallow, quick bouncing instead of full, controlled reps.
+
+## Progression
+
+Slow the tempo, pause at the bottom, then load the pattern with the
+Goblet Squat.