- tech draw draft v2

src/fluency/models/data_model.py

@@ -891,8 +891,8 @@ class DrawingView:
     direction: Optional[Tuple[float, float, float]] = None
     up_vector: Optional[Tuple[float, float, float]] = None
 
-    show_hidden_lines: bool = True
-    show_centerlines: bool = True
+    show_hidden_lines: bool = False
+    show_centerlines: bool = False
     scale: float = 1.0
 
     # Sheet position (mm from sheet origin) — set by layout engine.

src/fluency/ui/technical_drawing_widget.py

@@ -290,12 +290,12 @@ class TechnicalDrawingWidget(QWidget):
         for vid in ("front", "top", "right", "isometric"):
             self._view_checkboxes[vid].setChecked(True)
         # Match the DrawingView model defaults (hidden lines + centerlines
-        # on) so Generate produces the same drawing as the tab-switch
+        # off) so Generate produces the same drawing as the tab-switch
         # auto-load in MainWindow._load_drawing_tab_source.
         for cb in self._hidden_line_checks.values():
-            cb.setChecked(True)
+            cb.setChecked(False)
         for cb in self._centerline_checks.values():
-            cb.setChecked(True)
+            cb.setChecked(False)
 
         left_layout.addWidget(views_group)