PCEXTRACTSECTION: Extract Section Lines dialog

Picking the cloud opens the Extract Section Lines from Point Cloud
dialog with the reference's settings and defaults: entire cross section
or perimeter only, maximum points to process (slider and field, with
the estimated time), output layer (Use Current or a layer), colour,
lines or 2D polylines with their width, minimum line length and connect
lines tolerance (each measurable by two points on screen), collinear
angle tolerance (0-10) and Preview result. Create extracts; with the
preview it asks [Accept/Settings/Undo] and Settings reopens the dialog.
The settings are kept for the session. Automation action pc_section.

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

src/locale_catalog.rs

@@ -143,6 +143,26 @@ pub(super) fn message_attribute(source: &str) -> Option<(&'static str, &'static
         "Collapse all" => Some(("insert", "pc-collapse-all")),
         "Expand all" => Some(("insert", "pc-expand-all")),
         "Scheme name" => Some(("insert", "pcm-scheme-name")),
+        "Extract Section Lines from Point Cloud" => Some(("insert", "pcs-title")),
+        "Extract" => Some(("insert", "pcs-extract")),
+        "Entire cross section" => Some(("insert", "pcs-entire")),
+        "Perimeter only" => Some(("insert", "pcs-perimeter")),
+        "Maximum points to process" => Some(("insert", "pcs-max-points")),
+        "Faster" => Some(("insert", "pcs-faster")),
+        "More accurate" => Some(("insert", "pcs-accurate")),
+        "Estimated time: {count} min" => Some(("insert", "pcs-time")),
+        "Output geometry" => Some(("insert", "pcs-output")),
+        "2D Polylines" => Some(("insert", "pcs-polylines")),
+        "Polyline width" => Some(("insert", "pcs-width")),
+        "Extraction tolerances" => Some(("insert", "pcs-tolerances")),
+        "Minimum line length" => Some(("insert", "pcs-min-length")),
+        "Connect lines tolerance" => Some(("insert", "pcs-connect")),
+        "Collinear angle tolerance" => Some(("insert", "pcs-angle")),
+        "Preview result" => Some(("insert", "pcs-preview")),
+        "Use Current" => Some(("insert", "pcs-use-current")),
+        "Requires a positive number." => Some(("insert", "pcs-positive")),
+        "Requires a positive integer." => Some(("insert", "pcs-positive-int")),
+        "Traces the points on the kept side of a live section as lines." => Some(("insert", "pcs-help")),
         "Stylization" => Some(("properties", "stylization")),
         "Color scheme" => Some(("properties", "color-scheme")),
         "Scan Colors" => Some(("properties", "scan-colors")),