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/Bench Press.info.md

@@ -0,0 +1,40 @@
+# Bench Press
+
+The barbell press — lying on the flat bench, lower the bar to the chest
+and press it back to straight arms.
+
+- **Category:** Main circuit
+- **Type:** Free-weight horizontal press
+- **Targets:** Chest, front delts, triceps
+- **Prescription:** 4 × 6–8
+
+## Setup
+
+Lie with eyes under the bar, feet flat on the floor, shoulder blades
+pinched back and down. Grip a little wider than shoulder-width and
+unrack to straight arms over the shoulders.
+
+## Execution
+
+1. Lower the bar under control to the mid-chest, elbows about 45° from
+   the body.
+2. Touch lightly — no bounce.
+3. Press back up and slightly toward the face to lockout over the
+   shoulders.
+
+## Cues
+
+- Shoulder blades stay pinched against the bench the whole set.
+- Wrists stacked over elbows; bar sits low in the palm.
+- Feet drive quietly into the floor.
+
+## Common Mistakes
+
+- Bouncing the bar off the chest.
+- Elbows flared straight out at 90°.
+- Hips lifting off the bench.
+
+## Progression
+
+Add small plates while every rep touches and locks out; a spotter or
+safety pins once the loads get honest.