feat: node graph overlay; move to opencadcodec/opencadkernel/opencadgraph

The codec and kernel repositories and crates are renamed opencadcodec and
opencadkernel. Inside OCS they are depended on under short keys, so code
reads `codec::`, `kernel::` and the new `graph::` (opencadgraph, the node
graph engine). File-format and protocol spellings stay as they were: the
ACIS product id `acadrust`, the ACADRUST_* switches and the plugin
version keys `acadrust_version` / `acadrust_source`.

A button left of MCP on the command line opens a translucent node graph
over the viewport, with a palette of object, input, math, logic, list,
text and geometry nodes added by click or drag. An object node owns
drawing entities and its rows are the Properties panel's own rows for
them: the single-object page is extracted from refresh_properties as
entity_property_sections, values use the control protocol's
property_json, and writes go through set_property_value with a property
target override, so the panel, MCP and the graph share one read/write
path. A list reaching an object row makes one entity per element. Each
graph action is one undo step; the canvas pans and zooms.

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

src/modules/draw/modify/fillet.rs

@@ -9,19 +9,19 @@
 //   Pick two lines (line-only; arcs are not chamferable).
 //   Finds intersection, backs off dist1 along line 1 and dist2 along line 2.
 
-use acadrust::entities::{Arc as ArcEnt, Line as LineEnt, LwPolyline};
+use codec::entities::{Arc as ArcEnt, Line as LineEnt, LwPolyline};
 
-// Shared plane geometry, from cadkernel via the local adapters.
+// Shared plane geometry, from opencadkernel via the local adapters.
 use super::geom;
 use super::geom::{arc_points as arc_pts, line_line as ll, normalize_angle as norm_angle};
-use cadkernel::geom2d::{
+use kernel::geom2d::{
     circle_circle_points as circle_circle_pts, fillet_between_rays, fillets_between, line_circle,
     Arc as KernelArc, Curve as KernelCurve, Fillet as KernelFillet,
     Line as KernelLine, Tolerance,
 };
-use acadrust::entities::EntityCommon;
-use acadrust::types::Vector3;
-use acadrust::{EntityType, Handle};
+use codec::entities::EntityCommon;
+use codec::types::Vector3;
+use codec::{EntityType, Handle};
 use glam::DVec3;
 use crate::t;
 
@@ -1552,7 +1552,7 @@ impl CadCommand for FilletCommand {
         self.undo_last()
     }
 
-    fn on_document_undone(&mut self, document: &acadrust::CadDocument) {
+    fn on_document_undone(&mut self, document: &codec::CadDocument) {
         self.all_entities = document
             .entities()
             .map(crate::entities::curve::entity_with_lwpolyline_world_xy)
@@ -2147,7 +2147,7 @@ impl CadCommand for ChamferCommand {
         self.undo_last()
     }
 
-    fn on_document_undone(&mut self, document: &acadrust::CadDocument) {
+    fn on_document_undone(&mut self, document: &codec::CadDocument) {
         self.all_entities = document
             .entities()
             .map(crate::entities::curve::entity_with_lwpolyline_world_xy)
@@ -2377,7 +2377,7 @@ mod tests {
     /// by an infinite factor: the center becomes (inf, NaN).
     fn overflowed_arc(sweep_sign: f64) -> ArcEnt {
         let mut arc = ArcEnt::new();
-        arc.center = acadrust::types::Vector3::new(f64::INFINITY, f64::NAN, 0.0);
+        arc.center = codec::types::Vector3::new(f64::INFINITY, f64::NAN, 0.0);
         arc.radius = f64::INFINITY;
         arc.start_angle = 0.0;
         arc.end_angle = sweep_sign * std::f64::consts::PI;
@@ -2410,7 +2410,7 @@ mod tests {
         assert!(matches!(command.on_text_input("U"), Some(CmdResult::UndoDocument)));
         assert_eq!(keywords(&command), ["P", "R"]);
         // The host hands the restored document back; the cache follows it.
-        let mut doc = acadrust::CadDocument::new();
+        let mut doc = codec::CadDocument::new();
         let _ = doc.add_entity(line(0.0, 0.0, 20.0, 0.0, 7));
         command.on_document_undone(&doc);
         assert_eq!(command.all_entities.len(), 1);