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/06h_flap_membrane.py

@@ -0,0 +1,109 @@
+# Stage 6h: bi-harmonic membrane over the located flap sphere. Melting (06g) barely dented
+# the fold — layered flaps are locally smooth and resist neighbour-averaging. Replace instead:
+# excise the sphere, solve the rim-anchored membrane (same method that healed the gusset).
+#   blender --background --python 06h_flap_membrane.py -- <in.blend> <out.blend> <cx> <cy> <cz> <r>
+import bpy, sys, time
+import numpy as np
+
+argv = sys.argv[sys.argv.index("--") + 1:]
+BLEND, OUT = argv[0], argv[1]
+CTR = np.array([float(argv[2]), float(argv[3]), float(argv[4])])
+R = float(argv[5])
+t0 = time.time()
+
+
+def log(m):
+    print(f"[flap {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)
+
+n_e = len(me.edges)
+ev0 = np.empty(n_e * 2, dtype=np.int32)
+me.edges.foreach_get("vertices", ev0)
+ev0 = ev0.reshape(-1, 2)
+
+
+def grow_edges(mask, rings, ev):
+    m = mask.copy()
+    for _ in range(rings):
+        hit = m[ev[:, 0]] | m[ev[:, 1]]
+        m2 = m.copy()
+        m2[ev[:, 0]] |= hit
+        m2[ev[:, 1]] |= hit
+        m = m2
+    return m
+
+
+sph = np.linalg.norm(co - CTR, axis=1) < R
+free_m = grow_edges(sph, 1, ev0)
+collar = grow_edges(free_m, 2, ev0) & ~free_m
+S = np.nonzero(free_m | collar)[0]
+in_S = np.zeros(n_v, dtype=bool)
+in_S[S] = True
+glb = np.full(n_v, -1, dtype=np.int64)
+glb[S] = np.arange(len(S))
+se = ev0[in_S[ev0].all(axis=1)]
+a_ = glb[se[:, 0]]
+b_ = glb[se[:, 1]]
+deg = np.zeros(len(S))
+np.add.at(deg, a_, 1.0)
+np.add.at(deg, b_, 1.0)
+free = free_m[S]
+log(f"sphere {sph.sum()} -> free {free.sum()}, collar {(~free).sum()}")
+
+
+def Ls(X):
+    out = deg[:, None] * X
+    np.add.at(out, a_, -X[b_])
+    np.add.at(out, b_, -X[a_])
+    return out
+
+
+def A_op(U):
+    X = np.zeros((len(S), 3))
+    X[free] = U
+    return Ls(Ls(X))[free]
+
+
+Xc = np.zeros((len(S), 3))
+Xc[~free] = co[S[~free]]
+rhs = -Ls(Ls(Xc))[free]
+U = co[S[free]].copy()
+r = rhs - A_op(U)
+p = r.copy()
+rs = (r * r).sum()
+rs0 = rs
+for it in range(120000):
+    Ap = A_op(p)
+    al = rs / max((p * Ap).sum(), 1e-30)
+    U += al * p
+    r -= al * Ap
+    rs2 = (r * r).sum()
+    if rs2 < 1e-18 or rs2 < rs0 * 1e-14:
+        break
+    p = r + (rs2 / rs) * p
+    rs = rs2
+co_new = co.copy()
+co_new[S[free]] = U
+d = np.linalg.norm(co_new - co, axis=1)
+log(f"membrane: {free.sum()} verts (CG {it} iters, rel {rs2/max(rs0,1e-30):.2e}), "
+    f"max move {d.max():.4f}")
+
+me.vertices.foreach_set("co", co_new.reshape(-1))
+me.update()
+if me.has_custom_normals:
+    vn = np.empty(n_v * 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("FLAP_DONE")