reorg(characters): ship-time folders — lena_base_v01 ships, lane moves to work/lena

REGISTRY rewritten around the central rule: a character folder is born only
when a body ships to ariki-game (<character>_base_v<NN> = ship ordinal).
lena_nude dissolves accordingly:
- characters/female/lena_base_v01/ — SHIPPED 2026-08-10: AccuRig GLB carrier,
  T-pose/rig FBX + JSON, previews, frozen README
- characters/work/lena/ — the live lane: recipes 01-47 (incl. new 36-47:
  refill/sheets/clay/despeckle/musculature/spin/AccuRig export/graft/pose QC),
  masters (athletic_v04 blend + textures, accurig blend), lane-history README
- hires_claude/hires_work intermediates (blends, logs, probes) pruned

Supporting docs: AGENTS.md, working-files rule, rig-graft plan addendum,
originals README, prune_lane.py.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

characters/work/lena/15_true_weld.py

@@ -0,0 +1,94 @@
+# Stage 15: TRUE topological weld of the panel seams. Diagnosis: membranes level both sides
+# of every seam yet the lines persist -> the two sides are disconnected vertex runs (the
+# original "weld" unified positions only). Each panel smooths and shades independently, so a
+# crack survives any vertex MOVEMENT. Fix: bmesh remove_doubles restricted to the seam verts,
+# which merges the runs into shared vertices -> shared normals -> no shading discontinuity.
+# Loops keep their UVs, so the baked texture is unaffected. Vertex count changes; this is
+# only legal at the END of the pipeline (masks.npz indices die here).
+#   blender --background --python 15_true_weld.py -- <in.blend> <raw.glb> <out.blend>
+import bpy, bmesh, sys, time
+import numpy as np
+from mathutils import Vector
+from mathutils.kdtree import KDTree
+
+argv = sys.argv[sys.argv.index("--") + 1:]
+BLEND, RAW, OUT = argv[0], argv[1], argv[2]
+t0 = time.time()
+
+SEAM_TOL = 0.0025
+MERGE_DIST = 0.002
+
+
+def log(m):
+    print(f"[weld {time.time()-t0:6.1f}s] {m}", flush=True)
+
+
+bpy.ops.wm.open_mainfile(filepath=BLEND)
+ob = max([o for o in bpy.data.objects if o.type == 'MESH'],
+         key=lambda o: len(o.data.vertices))
+me = ob.data
+n_v = len(me.vertices)
+co = np.empty(n_v * 3)
+me.vertices.foreach_get("co", co)
+co = co.reshape(-1, 3)
+
+before = set(bpy.data.objects)
+bpy.ops.import_scene.gltf(filepath=RAW)
+new = [o for o in bpy.data.objects if o not in before]
+raw = max([o for o in new if o.type == 'MESH'], key=lambda o: len(o.data.vertices))
+rme = raw.data
+rn = len(rme.vertices)
+log(f"working mesh {n_v}v | raw mesh {rn}v | equal: {rn == n_v}")
+rco = np.empty(rn * 3)
+rme.vertices.foreach_get("co", rco)
+rco = rco.reshape(-1, 3)
+l_tot = np.empty(len(rme.polygons), dtype=np.int32)
+rme.polygons.foreach_get("loop_total", l_tot)
+l_start = np.empty(len(rme.polygons), dtype=np.int32)
+rme.polygons.foreach_get("loop_start", l_start)
+l_v = np.empty(len(rme.loops), dtype=np.int32)
+rme.loops.foreach_get("vertex_index", l_v)
+ecount = {}
+for fs, ft in zip(l_start, l_tot):
+    idxs = l_v[fs:fs + ft]
+    for k in range(ft):
+        a, b = idxs[k], idxs[(k + 1) % ft]
+        kk = (a, b) if a < b else (b, a)
+        ecount[kk] = ecount.get(kk, 0) + 1
+rbnd = np.zeros(rn, dtype=bool)
+for (a, b), c in ecount.items():
+    if c == 1:
+        rbnd[a] = rbnd[b] = True
+for o in new:
+    bpy.data.objects.remove(o, do_unlink=True)
+log(f"raw boundary verts: {rbnd.sum()}")
+
+kd = KDTree(n_v)
+for i in range(n_v):
+    kd.insert(Vector(co[i]), i)
+kd.balance()
+seam = np.zeros(n_v, dtype=bool)
+for p in rco[rbnd]:
+    for (_, idx, dist) in kd.find_range(Vector(p), SEAM_TOL):
+        seam[idx] = True
+log(f"seam verts (range map): {seam.sum()}")
+
+bm = bmesh.new()
+bm.from_mesh(me)
+bm.verts.ensure_lookup_table()
+sel = [bm.verts[i] for i in np.nonzero(seam)[0]]
+res = bmesh.ops.remove_doubles(bm, verts=sel, dist=MERGE_DIST)
+bm.to_mesh(me)
+bm.free()
+me.update()
+n_after = len(me.vertices)
+log(f"merged: {n_v} -> {n_after} verts (-{n_v - n_after})")
+
+# smooth vertex normals across the now-shared seams
+vn = np.empty(n_after * 3, dtype=np.float32)
+me.vertices.foreach_get("normal", vn)
+me.normals_split_custom_set_from_vertices(vn.reshape(-1, 3))
+bpy.context.preferences.filepaths.save_version = 0  # no .blend1 autosave
+bpy.ops.wm.save_as_mainfile(filepath=OUT)
+log(f"WROTE {OUT}")
+print("WELD_DONE")