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 <[email protected]>

src/app/mod.rs

@@ -498,6 +498,7 @@ pub(super) struct OpenCADStudio {
     /// PDF dialogs' working copies; `None` while closed.
     pdf_attach: Option<crate::ui::window::pdf_dialogs::PdfAttachState>,
     point_cloud_attach: Option<crate::ui::window::pdf_dialogs::PointCloudAttachState>,
+    point_cloud_color_map: Option<crate::ui::window::pdf_dialogs::PointCloudColorMapState>,
     underlay_layers: Option<crate::ui::window::pdf_dialogs::UnderlayLayersState>,
     pdf_import_settings: Option<crate::modules::insert::pdf_import::PdfImportSettings>,
     pdf_import_file: Option<crate::ui::window::pdf_dialogs::PdfImportFileState>,
@@ -1903,6 +1904,7 @@ pub enum ModalKind {
     BlockDefinition,
     PdfAttach,
     PointCloudAttach,
+    PointCloudColorMap,
     UnderlayLayers,
     PdfImportSettings,
     PdfImportFile,
@@ -4034,6 +4036,7 @@ impl OpenCADStudio {
             block_definition: None,
             pdf_attach: None,
             point_cloud_attach: None,
+            point_cloud_color_map: None,
             underlay_layers: None,
             pdf_import_settings: None,
             pdf_import_file: None,