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/entities/mesh.rs

@@ -1,6 +1,6 @@
-use acadrust::entities::{mesh::Mesh, polygon_mesh::PolygonMesh, Face3D, PolyfaceMesh};
-use cadkernel::geom2d::{triangulate, Tolerance};
-use cadkernel::space::{polygon, NurbsSurface3, Plane, Vec3 as KernelVec3};
+use codec::entities::{mesh::Mesh, polygon_mesh::PolygonMesh, Face3D, PolyfaceMesh};
+use kernel::geom2d::{triangulate, Tolerance};
+use kernel::space::{polygon, NurbsSurface3, Plane, Vec3 as KernelVec3};
 use glam::Vec3;
 
 use crate::command::EntityTransform;
@@ -57,15 +57,15 @@ pub(crate) fn triangulate_planar(poly: &[[f64; 3]]) -> Vec<[f64; 3]> {
 
 // ── Face3D ────────────────────────────────────────────────────────────────────
 
-fn v3(v: &acadrust::types::Vector3) -> [f64; 3] {
+fn v3(v: &codec::types::Vector3) -> [f64; 3] {
     [v.x, v.y, v.z]
 }
 
-fn dvec3(v: &acadrust::types::Vector3) -> glam::DVec3 {
+fn dvec3(v: &codec::types::Vector3) -> glam::DVec3 {
     glam::DVec3::new(v.x, v.y, v.z)
 }
 
-fn v3f32(v: &acadrust::types::Vector3) -> [f32; 3] {
+fn v3f32(v: &codec::types::Vector3) -> [f32; 3] {
     [v.x as f32, v.y as f32, v.z as f32]
 }
 
@@ -94,7 +94,7 @@ fn face3d_fill(corners: [[f64; 3]; 4]) -> Vec<[f64; 3]> {
 }
 
 impl RenderConvertible for Face3D {
-    fn to_render(&self, _document: &acadrust::CadDocument) -> Option<RenderEntity> {
+    fn to_render(&self, _document: &codec::CadDocument) -> Option<RenderEntity> {
         let p0 = v3(&self.first_corner);
         let p1 = v3(&self.second_corner);
         let p2 = v3(&self.third_corner);
@@ -292,7 +292,7 @@ impl Transformable for Face3D {
 // ── PolygonMesh (N×M grid) ────────────────────────────────────────────────────
 
 fn polygon_mesh_display(mesh: &PolygonMesh) -> (Vec<[f64; 3]>, usize, usize) {
-    use acadrust::entities::polygon_mesh::SurfaceSmoothType;
+    use codec::entities::polygon_mesh::SurfaceSmoothType;
 
     let m = mesh.m_vertex_count.max(0) as usize;
     let n = mesh.n_vertex_count.max(0) as usize;
@@ -354,7 +354,7 @@ fn polygon_mesh_display(mesh: &PolygonMesh) -> (Vec<[f64; 3]>, usize, usize) {
 }
 
 impl RenderConvertible for PolygonMesh {
-    fn to_render(&self, _document: &acadrust::CadDocument) -> Option<RenderEntity> {
+    fn to_render(&self, _document: &codec::CadDocument) -> Option<RenderEntity> {
         let (vertices, m, n) = polygon_mesh_display(self);
         if m == 0 || n == 0 || vertices.len() < m * n {
             return None;
@@ -439,7 +439,7 @@ impl Grippable for PolygonMesh {
 
 impl PropertyEditable for PolygonMesh {
     fn geometry_properties(&self, _text_style_names: &[String]) -> Vec<PropSection> {
-        use acadrust::entities::polygon_mesh::SurfaceSmoothType;
+        use codec::entities::polygon_mesh::SurfaceSmoothType;
 
         let smooth = match self.smooth_type {
             SurfaceSmoothType::NoSmooth => "None",
@@ -523,7 +523,7 @@ impl PropertyEditable for PolygonMesh {
     }
 
     fn apply_geom_prop(&mut self, field: &str, value: &str) {
-        use acadrust::entities::polygon_mesh::{PolygonMeshFlags, SurfaceSmoothType};
+        use codec::entities::polygon_mesh::{PolygonMeshFlags, SurfaceSmoothType};
 
         let bool_value = |current: bool| {
             if value == "toggle" {
@@ -617,7 +617,7 @@ impl Transformable for PolygonMesh {
 // ── PolyfaceMesh (arbitrary faces with 1-based vertex indices) ────────────────
 
 impl RenderConvertible for PolyfaceMesh {
-    fn to_render(&self, _document: &acadrust::CadDocument) -> Option<RenderEntity> {
+    fn to_render(&self, _document: &codec::CadDocument) -> Option<RenderEntity> {
         if self.vertices.is_empty() || self.faces.is_empty() {
             return None;
         }
@@ -668,10 +668,10 @@ impl Grippable for PolyfaceMesh {
 impl PropertyEditable for PolyfaceMesh {
     fn geometry_properties(&self, _text_style_names: &[String]) -> Vec<PropSection> {
         let smooth = match self.smooth_surface {
-            acadrust::entities::PolyfaceSmoothType::None => "None",
-            acadrust::entities::PolyfaceSmoothType::Quadratic => "Quadratic",
-            acadrust::entities::PolyfaceSmoothType::Cubic => "Cubic",
-            acadrust::entities::PolyfaceSmoothType::Bezier => "Bezier",
+            codec::entities::PolyfaceSmoothType::None => "None",
+            codec::entities::PolyfaceSmoothType::Quadratic => "Quadratic",
+            codec::entities::PolyfaceSmoothType::Cubic => "Cubic",
+            codec::entities::PolyfaceSmoothType::Bezier => "Bezier",
         };
         let first = self.vertices.first();
         vec![
@@ -994,13 +994,13 @@ fn display_mesh(mesh: &Mesh) -> RefinedMesh {
 /// Convert a closed indexed mesh entity to an exact planar-faced B-rep.
 /// Open, non-manifold, non-planar, and degenerate meshes return `None` so a
 /// modelling command can leave the source untouched.
-pub(crate) fn closed_mesh_body(entity: &acadrust::EntityType) -> Option<cadkernel::brep::Body> {
+pub(crate) fn closed_mesh_body(entity: &codec::EntityType) -> Option<kernel::brep::Body> {
     match entity {
-        acadrust::EntityType::Mesh(mesh) => {
+        codec::EntityType::Mesh(mesh) => {
             let base = base_refined_mesh(mesh);
-            cadkernel::brep::make::faceted_solid(&base.vertices, &base.faces)
+            kernel::brep::make::faceted_solid(&base.vertices, &base.faces)
         }
-        acadrust::EntityType::PolygonMesh(mesh) => {
+        codec::EntityType::PolygonMesh(mesh) => {
             if !mesh.is_closed_m() || !mesh.is_closed_n() {
                 return None;
             }
@@ -1026,9 +1026,9 @@ pub(crate) fn closed_mesh_body(entity: &acadrust::EntityType) -> Option<cadkerne
                     ]);
                 }
             }
-            cadkernel::brep::make::faceted_solid(&vertices, &faces)
+            kernel::brep::make::faceted_solid(&vertices, &faces)
         }
-        acadrust::EntityType::PolyfaceMesh(mesh) => {
+        codec::EntityType::PolyfaceMesh(mesh) => {
             let vertices = mesh
                 .vertices
                 .iter()
@@ -1046,7 +1046,7 @@ pub(crate) fn closed_mesh_body(entity: &acadrust::EntityType) -> Option<cadkerne
                     (indices.len() >= 3).then_some(indices)
                 })
                 .collect::<Vec<_>>();
-            cadkernel::brep::make::faceted_solid(&vertices, &faces)
+            kernel::brep::make::faceted_solid(&vertices, &faces)
         }
         _ => None,
     }
@@ -1191,13 +1191,13 @@ fn make_mesh_lod_set(
 /// pipeline. The retained wire entity carries snaps/grips only; fill, normals,
 /// depth, materials and face colours live in `MeshLodSet`.
 pub(crate) fn tessellate_shaded_mesh(
-    entity: &acadrust::EntityType,
+    entity: &codec::EntityType,
     color: [f32; 4],
 ) -> Option<crate::scene::model::mesh_model::MeshLodSet> {
     use std::collections::HashSet;
 
     match entity {
-        acadrust::EntityType::Mesh(mesh) => {
+        codec::EntityType::Mesh(mesh) => {
             let display = display_mesh(mesh);
             let mut edges = HashSet::new();
             for face in &display.faces {
@@ -1214,7 +1214,7 @@ pub(crate) fn tessellate_shaded_mesh(
                 &[],
             )
         }
-        acadrust::EntityType::PolygonMesh(mesh) => {
+        codec::EntityType::PolygonMesh(mesh) => {
             let (vertices, m, n) = polygon_mesh_display(mesh);
             if m == 0 || n == 0 || vertices.len() < m.saturating_mul(n) {
                 return None;
@@ -1248,7 +1248,7 @@ pub(crate) fn tessellate_shaded_mesh(
                 &[],
             )
         }
-        acadrust::EntityType::PolyfaceMesh(mesh) => {
+        codec::EntityType::PolyfaceMesh(mesh) => {
             let vertices: Vec<[f64; 3]> = mesh
                 .vertices
                 .iter()
@@ -1296,7 +1296,7 @@ pub(crate) fn tessellate_shaded_mesh(
 }
 
 impl RenderConvertible for Mesh {
-    fn to_render(&self, _document: &acadrust::CadDocument) -> Option<RenderEntity> {
+    fn to_render(&self, _document: &codec::CadDocument) -> Option<RenderEntity> {
         if self.vertices.is_empty() {
             return None;
         }