Fix Texture-Picker: Custom-Bridge fuer Project-Settings Satellite

open_satellite_window ohne bridge=-Param verwendet eine Inline-Bridge die
nur READY/SAVE/CANCEL kennt — PICK_TEXTURE_FILE-Messages wurden stumm
verworfen.

Fix: _ProjectSettingsBridge als BaseBridge-Subclass mit eigener
PICK_TEXTURE_FILE-Handler-Logik. Sendet TEXTURE_PICKED direkt zurueck an
die selbe WebView.

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

rhino/rhinopanel.py

@@ -749,12 +749,62 @@ class EbenenBridge(panel_base.BaseBridge):
                 print("[PROJECT-SETTINGS] {} Waende regenert".format(len(wall_ids)))
             except Exception as ex:
                 print("[PROJECT-SETTINGS] wall regen:", ex)
-        panel_base.open_satellite_window(
+        # Custom-Bridge fuer Project-Settings: handelt SAVE/CANCEL +
+        # PICK_TEXTURE_FILE direkt in dieser Satellite-WebView. Inline-Bridge
+        # konnte nur READY/SAVE/CANCEL → Texture-Picker-Messages gingen
+        # verloren.
+        bridge_holder = {"form": None}
+        class _ProjectSettingsBridge(panel_base.BaseBridge):
+            def __init__(self):
+                panel_base.BaseBridge.__init__(self, "project_settings")
+            def handle(self, data):
+                if not isinstance(data, dict): return
+                t = data.get("type", "")
+                p = data.get("payload") or {}
+                if t == "READY":
+                    pass
+                elif t == "SAVE":
+                    try: on_save(p)
+                    except Exception as ex:
+                        print("[PROJECT-SETTINGS] on_save:", ex)
+                    try:
+                        f = bridge_holder.get("form")
+                        if f is not None: f.Close()
+                    except Exception: pass
+                elif t == "CANCEL":
+                    try:
+                        f = bridge_holder.get("form")
+                        if f is not None: f.Close()
+                    except Exception: pass
+                elif t == "PICK_TEXTURE_FILE":
+                    self._pick_texture(p)
+            def _pick_texture(self, payload):
+                slot = payload.get("slot") or "diffuse"
+                try:
+                    import Eto.Forms as forms
+                    dlg = forms.OpenFileDialog()
+                    dlg.Title = "Textur waehlen ({})".format(slot)
+                    dlg.MultiSelect = False
+                    dlg.Filters.Add(forms.FileFilter("Bilder",
+                        ".jpg", ".jpeg", ".png", ".tif", ".tiff", ".bmp", ".tga"))
+                    dlg.Filters.Add(forms.FileFilter("Alle", ".*"))
+                    parent = bridge_holder.get("form")
+                    res = dlg.ShowDialog(parent) if parent else dlg.ShowDialog(None)
+                    if str(res) != "Ok":
+                        self.send("TEXTURE_PICKED", {"slot": slot, "path": None})
+                        return
+                    self.send("TEXTURE_PICKED",
+                              {"slot": slot, "path": dlg.FileName or ""})
+                except Exception as ex:
+                    print("[PROJECT-SETTINGS] pick_texture:", ex)
+                    self.send("TEXTURE_PICKED", {"slot": slot, "path": None})
+        b = _ProjectSettingsBridge()
+        bridge_holder["form"] = panel_base.open_satellite_window(
             "project_settings",
             params=params,
             title="Projekt-Einstellungen",
             size=(440, 540),
-            on_save=on_save)
+            bridge=b)
 
     def _pick_texture_file(self, payload):
         """Oeffnet macOS-File-Picker (via Eto.Forms.OpenFileDialog) und