Raise the character mesh budget to 8000

docs/blender-assets.md

@@ -92,10 +92,12 @@ All eight use the `npc_base` contract, so each one can replace
 - material slots `skin`, `cloth`, `pants`, `accessory`, `hair` carry the same
   neutral `assets/textures/npc/<slot>_{albedo,normal}.png` maps, so
   `Materials.npc_slot()` tints them the same way it tints `npc_base`.
-- budget ≤ 6000 triangles and ≤ 5000 vertices (glTF vertex count, after seam
-  splits; `CHAR_MAX_VERTS` in `tools/blender_assets.py`, raised from 4000 for
-  the 2026-11-01 face/hand pass). The current range is 4,042–5,034 triangles
-  and 3,894–4,948 vertices. The vertex cap is now the tighter budget.
+- budget ≤ **8,000 triangles and ≤ 8,000 glTF vertices** for the eight library
+  variants (vertex count after seam splits; `CHAR_MAX_TRIS`/`CHAR_MAX_VERTS` in
+  `tools/blender_assets.py`, raised from 6,000/5,000 on 2026-11-02). The frozen
+  `npc_base` fallback keeps its original 6,000/4,000 contract. The current range
+  is 4,042–5,034 triangles and 3,894–4,948 vertices, leaving room for the
+  remaining face, grip and clothing detail.
 
 Construction: the torso and limbs are one continuous Skin-modifier mesh,
 subdivided twice, decimated to 26 % with X symmetry, and cut at the waist, cuffs,
@@ -177,7 +179,7 @@ carry baked AO and the shared neutral material maps described above.
 
 - `python3 tools/blender_assets.py audit`: container, `POSITION`/`NORMAL`/
   `TEXCOORD_0`, UVs in [0, 1], no zero-area triangles (Godot warns about them
-  during LOD generation), budgets (characters 6000/5000, gear 1500, props 4000
+  during LOD generation), budgets (library characters 8000/8000, base fallback 6000/4000, gear 1500, props 4000
   triangles), grounding, and an editable `.blend`. For characters it also
   checks skinning, bones, slots, the `npc_base` mesh node and the height.
 - `tools/test_blender_assets.py`: catalogue and contract consistency with