Projekt-Settings-Dialog + Library Phase A + Material-Merger

- Project-Settings-Dialog (Voreinstellungen Geschoss/Schnitt + Material-Editor)
  ueber Zahnrad-Icon in Oberleiste; Defaults werden in schnitte.pick_schnitt
  + GeschossManager als Vorgabe genommen, pro-Element-Werte unangetastet
- Dossier-Library Phase A (lokal, read-only): rhino/library.py + LibraryBrowser
  Satellite; Seed-Manifest unter ~/Library/Application Support/Dossier/library/
- Material-Merger: _get_all_materials(doc) merged builtin _MATERIAL_LIBRARY
  mit Projekt-Settings-Materialien (inkl. Library-Imports); Wand-Erstellung,
  Sub-Layer-Anlage + Elemente-Material-Dropdown ziehen jetzt aus dem Merge

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

rhino/elemente.py

@@ -2038,6 +2038,29 @@ _MATERIAL_LIBRARY = {
 }
 
 
+def _get_all_materials(doc):
+    """Builtin _MATERIAL_LIBRARY + Projekt-Settings-Materialien gemerged.
+    Returns dict[name] -> {color, hatch, scale}. Projekt-Settings (inkl.
+    Library-Imports) ueberschreibt builtin bei Namensgleichheit, sodass
+    der User builtin-Defaults pro Projekt anpassen kann."""
+    merged = {n: dict(m) for n, m in _MATERIAL_LIBRARY.items()}
+    try:
+        import rhinopanel
+        ps = rhinopanel.load_project_settings(doc) if doc else None
+        if isinstance(ps, dict):
+            for m in ps.get("materials", []):
+                n = m.get("name")
+                if not n: continue
+                merged[n] = {
+                    "color": m.get("color", "#888888"),
+                    "hatch": m.get("hatch", "Solid"),
+                    "scale": float(m.get("scale", 1.0) or 1.0),
+                }
+    except Exception as ex:
+        print("[ELEMENTE] _get_all_materials:", ex)
+    return merged
+
+
 def _set_layer_section_hatch(doc, layer_idx, hatch_name, scale=1.0,
                                 rotation=0.0):
     """Konfiguriert Rhinos native Section-Hatch-Properties am Layer.
@@ -2073,9 +2096,10 @@ def _ensure_material_sublayer(doc, geschoss_name, material_name):
     mit Material-Farbe + Section-Hatch konfiguriert. Liefert Layer-Index.
     Bei leerem oder unbekanntem Material: Fallback auf das normale
     Wand-Volume-Layer (= Standard fuer Solid-Waende)."""
-    if not material_name or material_name not in _MATERIAL_LIBRARY:
+    all_mats = _get_all_materials(doc)
+    if not material_name or material_name not in all_mats:
         return _ensure_layer(doc, _layer_path_volume(doc, geschoss_name))
-    mat = _MATERIAL_LIBRARY[material_name]
+    mat = all_mats[material_name]
     parent_path = _layer_path_volume(doc, geschoss_name)
     full_path = "{}::{}".format(parent_path, material_name)
     idx = _ensure_layer(doc, full_path)
@@ -5127,8 +5151,9 @@ def _regenerate_element_body(doc, element_id, src_obj, meta, geom, geschoss_name
             mat_name = lay_def.get("material", "") if is_layered else ""
             effective_color = color
             target_layer = layer
-            if mat_name and mat_name in _MATERIAL_LIBRARY:
-                effective_color = _MATERIAL_LIBRARY[mat_name]["color"]
+            all_mats = _get_all_materials(doc)
+            if mat_name and mat_name in all_mats:
+                effective_color = all_mats[mat_name]["color"]
                 target_layer = _ensure_material_sublayer(doc, geschoss_name,
                                                           mat_name)
                 if target_layer < 0: target_layer = layer
@@ -5838,7 +5863,7 @@ class ElementeBridge(panel_base.BaseBridge):
             "materials":          [
                 {"name": n, "color": m["color"],
                  "hatch": m.get("hatch", ""), "scale": m.get("scale", 1.0)}
-                for n, m in _MATERIAL_LIBRARY.items()],
+                for n, m in _get_all_materials(doc).items()],
             "oeffStyles":          list_oeff_styles(doc),
         }
         self.send("STATE", payload)