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/annotate/mleader_cmd.rs

@@ -227,6 +227,7 @@ fn preview_wire(pts: &[Vec3], arrow_size: f32) -> WireModel {
         points.push([w2.x, w2.y, w2.z]);
     }
     WireModel {
+        point_marker: None,
         taper_widths: Vec::new(),
         world_width: 0.0,
         depth_override: None,