Record the MakeHuman-head build outcome in the review doc and TODO

TODO.md

@@ -86,12 +86,12 @@ the rest of §C remains the broad review checklist.
       geometry — not a sphere with floating facial balls. Use loop-based eye sockets/lids, a
       readable nose bridge/tip/ala, a mouth with upper/lower lip volumes, ears with concha depth,
       and brow/cheek/jaw planes that survive the 256² AO bake.
-      `tools/npc_parts.py build --part head_proto` built the displacement shell (sockets, nose,
-      lips, chin, brow, ears) but the AI-judged rework (concept + judge, see
-      `docs/3d-model-review.md` §AI-driven head rework) shows it oscillates between "egg" and
-      "spiky" at ~3/5. The judge's decisive result: **ship the decimated MakeHuman head**
-      (1,573 tris, nose/chin/jaw landmarks) plus the project's separate eye/mouth/brow pieces. The
-      displacement `_head_proto` is a rejected variant; the MakeHuman head is the new base.
+      Outcome (AI-judged, 2026-11-04): the displacement shell oscillated egg/spiky at ~3/5; the
+      judge picked the **decimated MakeHuman head**. That head is now built as `_makehuman_head`
+      (`build_character(head="mh")`, `npc_parts.py build --part head_mh`): committed CC0 source
+      `assets/models/blender_src/makehuman_head.glb` + project sclera/iris/lids/brows/mouth;
+      assembled `npc_casual` passes `inspect` (14 bones, no issues). Remaining polish: weld the
+      eye/brow pieces into the head shell and add a skull-conforming hair cap (owner-gated rollout).
 - [x] Compare two or three subdivision/loop variants at 1.85 m front/three-quarter/profile and a
       1.5 m portrait. Pick the variant that reads best before changing all 12 characters; keep the
       rejected variants local.