Set gravity survives a re-read of the model during play: World.setSceneProp remembers what the run itself set on the scene and syncFromModel lays it back over the copied scene props, so a project event mid-play no longer resets the gravity to the saved 980; the unit test re-reads the model mid-run and e2e 41c forces a project event right after play starts (#147)

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

tools/e2e/41-physics.mjs

@@ -258,6 +258,9 @@ export async function physics(t) {
     put('phys-pushed-rb', 'phys-rb-free', 'phys-pushed', 0, 0);
     __gm.state.select(null)`);
   await play();
+  // A model event while playing re-reads the scene (CI had one in the first frames): what the run
+  // set with Set gravity has to outlive it.
+  await evaluate(`__gm.state.preview()`);
   await evaluate(`(() => {
     const out = (window.__physicsGraph = []);
     const start = performance.now();