Point clouds: attach dialog, crop toolbar, stylize, palette rows

POINTCLOUDATTACH opens the Attach Point Cloud dialog after the file is
chosen; its Attach button lives in the Attach Underlay list instead of a
separate Insert panel. A selected cloud brings the crop tools to the
right-edge toolbar. POINTCLOUDSTYLIZE sets the stylization with the
reference's prompts, the External References palette lists point clouds
(unload, reload, detach, path), and definitions keep the header extents.

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

src/locale_catalog.rs

@@ -96,6 +96,25 @@ pub(super) fn message_attribute(source: &str) -> Option<(&'static str, &'static
         "#RRGGBB or blank" => Some(("common", "rrggbb-or-blank")),
         "%{cmd}  Select objects (%{count} selected, Enter to apply):" => Some(("selection", "cmd-select-objects-count-selected-enter-to-app")),
         "%{cmd}  Select objects:" => Some(("selection", "cmd-select-objects")),
+        "Attach Point Cloud" => Some(("insert", "ul-attach-point-cloud")),
+        "Rectangular\nCrop" => Some(("insert", "pc-rect-crop")),
+        "Polygonal\nCrop" => Some(("insert", "pc-poly-crop")),
+        "Circular\nCrop" => Some(("insert", "pc-circ-crop")),
+        "Show\nCropping" => Some(("insert", "pc-show-crop")),
+        "Invert\nCropping" => Some(("insert", "pc-invert-crop")),
+        "Remove All\nCropping" => Some(("insert", "pc-uncrop")),
+        "Data:" => Some(("insert", "pc-data")),
+        "Size:" => Some(("insert", "pc-size")),
+        "Use geographic location" => Some(("insert", "pc-geo")),
+        "Lock point cloud" => Some(("insert", "pc-lock")),
+        "Zoom to point cloud" => Some(("insert", "pc-zoom")),
+        "{count} scans" => Some(("insert", "pc-scan-count")),
+        "{count} points" => Some(("insert", "pc-point-count")),
+        "Select Point Cloud File" => Some(("insert", "pc-select-file")),
+        "Point Cloud Project" => Some(("insert", "pc-rcp")),
+        "Point Cloud Scan" => Some(("insert", "pc-rcs")),
+        "Point Clouds" => Some(("insert", "pc-clouds")),
+        "Attaches a point cloud scan or project." => Some(("insert", "pc-help")),
         "Stylization" => Some(("properties", "stylization")),
         "Color scheme" => Some(("properties", "color-scheme")),
         "Scan Colors" => Some(("properties", "scan-colors")),