fix(plot): align paper space output

Use the same area pipeline as model space while keeping Layout bound to the physical sheet and printable margins. Share scale, rotation, clipping, and viewport fills across preview, PDF, and printer output.

src/modules/view/plot_window.rs

@@ -1,7 +1,7 @@
 // PLOTWINDOW command — pick two corners to define the plot window area.
 //
-// In paper space it writes the layout's PlotSettings (PlotType::Window); in
-// model space the host stores the window for the plot dialog.
+// In both model and paper space the host stores the picked rectangle for the
+// plot dialog; committing the dialog persists it to layout PlotSettings.
 
 use crate::command::{CadCommand, CmdResult};
 use crate::scene::model::wire_model::WireModel;