Raise the back gear to shoulder-blade height and compact the review page

TODO.md

@@ -959,6 +959,9 @@ contract.
 - [x] `docs/blender-assets.md` documents the 15-piece matrix and the hand-item fit table;
       `architecture.md`, `asset-tooling.md` and the preview index were updated with the new counts.
       `CREDITS.md` still cites the upstream pack, which is unchanged.
+- [x] Owner feedback: the back gear hung at the waist. The `back` attach moved from y 1.10 to
+      1.26 (shoulder-blade height on the Quaternius torso); backpack, shoulder bag and SCBA tank
+      re-captured on the character sheet.
 - [x] Re-measure `fit` for the back and chest gear on the slimmer torso: `backpack` inner x 0.150
       against a 0.190 clothing radius (straps cross the body, as intended), `shoulder_bag` x
       clearance +0.072, `scba_tank` inner x 0.150, `lanyard` radial clearance +0.012 on the chest.