Point clouds: POINTCLOUDCOLORMAP dialog, out-of-range colouring

POINTCLOUDCOLORMAP asks for a cloud (or None for the drawing's default
schemes) and opens the Point Cloud Color Map dialog: intensity and
elevation tabs with the scheme list, New / Delete / Rename, number of
colours (2-25, resampled along the scheme), blend between the ends,
reverse, gradient or bands, the colorized range, the out-of-range
choice and, for elevation, the cloud's extents or a fixed range with its
band height. OK / Apply write the drawing's colour map (created under
ACAD_POINTCLOUD_COLORMAP_DICT when missing) and the cloud's colouring in
one undo step; Make stylization current sets the tab's stylization.
Values outside a scheme's range take the end colours, the scan colours
or are hidden. Automation action pc_colormap edits the dialog.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/app/view/modal.rs

@@ -30,6 +30,7 @@ impl OpenCADStudio {
                 _ => crate::t!("Attach PDF Underlay").into_owned(),
             },
             Some(K::PointCloudAttach) => crate::t!("Attach Point Cloud").into_owned(),
+            Some(K::PointCloudColorMap) => crate::t!("Point Cloud Color Map").into_owned(),
             Some(K::UnderlayLayers) => crate::t!("Underlay Layers").into_owned(),
             Some(K::PdfImportSettings) => crate::t!("PDF Import Settings").into_owned(),
             Some(K::PdfImportFile) => crate::t!("Import PDF").into_owned(),
@@ -529,6 +530,12 @@ impl OpenCADStudio {
                     crate::ui::window::pdf_dialogs::view_point_cloud_attach(state, flow)
                 })
             }
+            super::super::ModalKind::PointCloudColorMap => {
+                let state = self.point_cloud_color_map.as_ref()?;
+                sized_flow(ex, 760, 560, |flow| {
+                    crate::ui::window::pdf_dialogs::view_point_cloud_color_map(state, flow)
+                })
+            }
             super::super::ModalKind::UnderlayLayers => {
                 let state = self.underlay_layers.as_ref()?;
                 sized_flow(ex, 460, 520, |flow| {