fix(polyline): render fill mode boundaries

Use kernel-produced band outlines when FILLMODE is off. Preserve centerline linetype stations through inserts, clipping, projection, and PDF export.

src/modules/annotate/angular_dim.rs

@@ -163,6 +163,7 @@ fn preview_wire(points: Vec<Vec3>) -> WireModel {
     WireModel {
         point_marker: None,
         taper_widths: Vec::new(),
+        pattern_stations: Vec::new(),
         world_width: 0.0,
         depth_override: None,
         display_visible: true,