dWall: Aufbau-Toggle (Solid/Mehrschichtig) + gefilterte Stil-Liste

Cluster-Dispatch: is_layered_meta Check zurueck — layered + non-linear (T,
Verzweigung) ist geometrisch sinnlos via per-Layer-Union (Schichten orthogonal
zwischen perpendikulaeren Waenden). Faellt zu Solo+Miter durch.

dWall-Prompt:
- Neue Option 'Aufbau' (Solid|Mehrschichtig)
- Stil-Liste gefiltert auf den gewaehlten Aufbau-Typ
- Beim Toggle: erster Style des neuen Typs uebernommen + dicke/referenz
- Default-Aufbau aus dem zuletzt verwendeten Style

rhino/elemente.py

@@ -8225,7 +8225,12 @@ def _regenerate_element_body(doc, element_id, src_obj, meta, geom, geschoss_name
             cluster_ids = _find_wall_cluster(doc, element_id)
         except Exception as ex:
             print("[ELEMENTE] cluster detect:", ex)
-        if (len(cluster_ids) > 1
+        # Cluster-Path (Boolean-Union): nur fuer SOLID + non-linear (T, branched).
+        # Layered + non-linear: per-Layer-Union ist geometrisch unsinnig weil
+        # die Schichten zwischen perpendikulaeren Waenden orthogonal stehen.
+        # → Layered T faellt zu Solo+Miter durch, layered L durch zu Chain.
+        is_layered_meta = bool(meta.get("wand_layered", False))
+        if (len(cluster_ids) > 1 and not is_layered_meta
                 and not _is_linear_chain(doc, cluster_ids)):
             anchor = sorted(cluster_ids)[0]
             if anchor != element_id:
@@ -9861,15 +9866,26 @@ class ElementeBridge(panel_base.BaseBridge):
         # Style-Setup — dann faellt's auf Legacy loose-Parameter zurueck).
         # Rhino's AddOptionList akzeptiert nur Single-Word-Labels (keine
         # Spaces/Spezialzeichen) — daher sanitizen wir die Anzeigenamen.
-        styles = _get_all_wand_styles(doc)
+        all_styles = _get_all_wand_styles(doc)
         def _sanitize_opt_label(s):
             import re
             return re.sub(r'[^a-zA-Z0-9_-]', '', s or "") or "?"
-        # style_labels = Rhino-Option-compatible (no spaces). style_names = human-readable.
+        # Aufbau-Filter: solid ODER layered. Stil-Picker zeigt nur passende Stile.
+        last_style_id = _last("wand_style_id",
+                                all_styles[0]["id"] if all_styles else "")
+        # Last-Used Style bestimmt initialen Aufbau (solid vs layered)
+        is_layered_mode = False
+        for s in all_styles:
+            if s.get("id") == last_style_id:
+                is_layered_mode = bool(s.get("layered", False))
+                break
+        def _filter_styles():
+            return [s for s in all_styles
+                     if bool(s.get("layered", False)) == is_layered_mode]
+        styles = _filter_styles()
         style_names  = [s.get("name", s.get("id", "?")) for s in styles]
         style_labels = [_sanitize_opt_label(n) for n in style_names]
-        # Last-Used Style: id oder Index. Default: erster Style oder ""
-        last_style_id = _last("wand_style_id", styles[0]["id"] if styles else "")
+        # style_idx innerhalb der gefilterten Liste finden
         style_idx = 0
         for i, s in enumerate(styles):
             if s.get("id") == last_style_id:
@@ -9894,11 +9910,15 @@ class ElementeBridge(panel_base.BaseBridge):
         try: ref_idx = ref_codes.index(referenz)
         except ValueError: ref_idx = 0
 
+        aufbau_labels = ["Solid", "Mehrschichtig"]
+
         def _build_prompt(base):
+            aufbau_part = " Aufbau={}".format(aufbau_labels[1 if is_layered_mode else 0])
             style_part = (" Stil={}".format(style_names[style_idx])
                           if styles else "")
-            return "{} [Modus={}{}, Referenz={}, Dicke={:.3f}]".format(
-                base, modus, style_part, ref_labels[ref_idx], dicke)
+            return "{} [Modus={}{}{}, Referenz={}, Dicke={:.3f}]".format(
+                base, modus, aufbau_part, style_part,
+                ref_labels[ref_idx], dicke)
 
         first_pt = None
         try:
@@ -9906,6 +9926,8 @@ class ElementeBridge(panel_base.BaseBridge):
                 gp = ric.GetPoint()
                 gp.SetCommandPrompt(_build_prompt("Wand: Startpunkt"))
                 opt_modus = gp.AddOptionList("Modus", modi, modi.index(modus))
+                opt_aufbau = gp.AddOptionList(
+                    "Aufbau", aufbau_labels, 1 if is_layered_mode else 0)
                 opt_style = -1
                 if styles:
                     opt_style = gp.AddOptionList("Stil", style_labels, style_idx)
@@ -9916,6 +9938,24 @@ class ElementeBridge(panel_base.BaseBridge):
                     if gp.OptionIndex() == opt_modus:
                         try: modus = modi[gp.Option().CurrentListOptionIndex]
                         except Exception: pass
+                    elif gp.OptionIndex() == opt_aufbau:
+                        try:
+                            is_layered_mode = (
+                                gp.Option().CurrentListOptionIndex == 1)
+                            styles = _filter_styles()
+                            style_names = [s.get("name", s.get("id", "?"))
+                                            for s in styles]
+                            style_labels = [_sanitize_opt_label(n)
+                                              for n in style_names]
+                            style_idx = 0
+                            if styles:
+                                s_active = styles[0]
+                                dicke = float(s_active.get("dicke", dicke))
+                                new_ref = s_active.get("referenz", referenz)
+                                if new_ref in ref_codes:
+                                    ref_idx = ref_codes.index(new_ref)
+                        except Exception as ex:
+                            print("[ELEMENTE] Aufbau toggle:", ex)
                     elif styles and gp.OptionIndex() == opt_style:
                         try:
                             style_idx = gp.Option().CurrentListOptionIndex