Bake library AO and lift environment textures

Phase 4 of the v0.6.0 graphics plan:

- tools/bake_ao.py bakes 256² AO maps for every Blender character/gear/prop
  (Cycles, existing UVs) next to each GLB; Materials.apply_ao() wires the red
  channel into character slots, gear, and props. Compatibility has no SSAO.
- Regenerated brick/concrete/asphalt at 1024² with OpenRouter, derived tangent
  normal maps via tools/make_normal_maps.py, and wired them through
  SurfaceMaterials.textured() without changing UV scales.
- Evaluated Forward+: boots on desktop Vulkan, but the renderer is project-wide
  and Web must stay GL Compatibility; v0.6.0 keeps Compatibility (decision in
  MEMORY/plan). A desktop-only override is deferred.
- Recaptured screenshots; compare 11 good / 0 bad. Fixed marquee text alignment.
- Tests: baked AO maps exist for all 46 assets; prop/character AO material
  checks; headless 222/222, Python 69/69, all smokes pass.
- Version 0.6.0; ADR-0013 accepted; README/architecture/blender-assets/plan and
  TODO/DONE updated.

DONE.md

@@ -860,3 +860,21 @@ smokes pass, `compare` **11 good / 0 bad**. AO/ORM baking remains in Phase 4.
       ~27,986 triangles. NPC budget smoke: 16 avatars = 112 meshes at ~6.9 ms.
 - [x] Recaptured the README/catalogue screenshots (including the prop gallery from the library
       models) and fixed the marquee text placement.
+
+## Environment and Lighting Lift
+
+Completed 2026-11-01 (v0.6.0). Headless **222/222**, Python **69/69**, all smokes pass,
+`compare` **11 good / 0 bad**.
+
+- [x] Baked per-asset AO maps for the full Blender library with `tools/bake_ao.py` (Cycles,
+      256×256, stored next to each GLB as `<name>_ao.png`); Godot wires the red channel into
+      `StandardMaterial3D.ao_texture` for character slots, gear and props.
+- [x] Regenerated brick, concrete and asphalt at 1024² through `asset_pipeline.py`, derived
+      tangent normal maps with `tools/make_normal_maps.py`, and wired them into
+      `SurfaceMaterials.textured()` while keeping the existing UV scales.
+- [x] Evaluated Forward+: it boots on the desktop Vulkan driver, but the renderer is a
+      project-wide setting and the Web build must stay on GL Compatibility. Decision: keep
+      Compatibility for v0.6.0; a desktop-only preset needs a separate project/override and is
+      deferred.
+- [x] Recaptured `docs/screenshots/` and ran `compare` + `judge`; no regressions.
+- [x] Fixed the library marquee text/face alignment and added the library AO/triangle tests.