body: liver parenchyma is solid tissue, not a blue vein

The liver is modelled as Couinaud "hepatovenous segment II–IX" — named for venous
drainage, so tissue_of tagged all 8 (the bulk of the liver, e.g. segment VIII =
21801 verts) as vein → material 3 (blue) AND slicer-filled as tubes. The liver
rendered as a blue, tube-filled vessel blob sitting above the colon.

Reclassify "hepatovenous segment N" → liver tissue → solid_tissue material + organ
compartment. The true hepatic/portal veins (all carry "vein" in their name, e.g.
"... segmental tributary of right hepatic vein") are untouched and stay vessels.
8 concepts vein→solid; fill 693→685 components. Wire + LOD blocks rebaked + reuploaded.

Author: claude

crates/cockpit-server/assets/body.blocks

@@ -158,6 +158,14 @@ def label_index(s):
         r = row_of[c]
         nm = canon.get(c, name.get(c, c))
         tissue = tissue_of(c, parent_isa, name, canon, tcache)
+        # Liver parenchyma is modelled as Couinaud "hepatovenous segment N" — named for
+        # its venous drainage, so tissue_of tags it 'vein'. That coloured the whole liver
+        # blue and slicer-filled it as a tube (it read as a blue vessel blob above the
+        # colon). It is solid liver tissue; only the true hepatic/portal *veins* (which
+        # all carry 'vein' in their name) stay vessels. Reclassify to liver → solid
+        # organ colour + the organ compartment.
+        if "hepatovenous segment" in nm.lower():
+            tissue = "liver"
         material = TISSUE_MATERIAL.get(tissue, 4)
         v_start = len(px)
         for fj in meshes_of[c]: