fix(point): preserve relative marker sizing

Keep rendering, picking, block transforms, and plotted output on the
same viewport-relative PDSIZE geometry without overloading wire width
fields.

src/modules/view/plot_window.rs

@@ -54,6 +54,7 @@ impl CadCommand for PlotWindowCommand {
         let p1 = self.p1?.as_vec3();
         // Draw the selection rectangle.
         Some(WireModel {
+            point_marker: None,
             taper_widths: Vec::new(),
             world_width: 0.0,
             depth_override: None,

src/modules/view/zoom_window.rs

@@ -136,6 +136,7 @@ impl CadCommand for ZoomWindowCommand {
         let max = p1.max(pt);
         // Draw a rectangle preview
         Some(WireModel {
+            point_marker: None,
             taper_widths: Vec::new(),
             world_width: 0.0,
             depth_override: None,