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/app/helpers.rs

@@ -1,4 +1,4 @@
-use acadrust::tables::Ucs;
+use codec::tables::Ucs;
 
 // ── Coordinate parsing ─────────────────────────────────────────────────────
 
@@ -137,7 +137,7 @@ impl UcsXform {
     }
 
     pub(super) fn from_ucs(ucs: &Ucs) -> Self {
-        let v = |a: acadrust::types::Vector3| glam::DVec3::new(a.x, a.y, a.z);
+        let v = |a: codec::types::Vector3| glam::DVec3::new(a.x, a.y, a.z);
         let x = v(ucs.x_axis).normalize_or(glam::DVec3::X);
         let raw_y = v(ucs.y_axis).normalize_or(glam::DVec3::Y);
         let fallback_z = if x.dot(glam::DVec3::Z).abs() < 0.999 {
@@ -211,8 +211,8 @@ impl UcsXform {
 
     /// Full UCS-local → WCS transform, using `origin` as local zero while
     /// retaining this UCS's orthonormal axes.
-    pub(crate) fn to_wcs_transform_at(&self, origin: glam::DVec3) -> acadrust::types::Transform {
-        use acadrust::types::{Matrix4, Transform};
+    pub(crate) fn to_wcs_transform_at(&self, origin: glam::DVec3) -> codec::types::Transform {
+        use codec::types::{Matrix4, Transform};
         Transform::from_matrix(Matrix4 {
             m: [
                 [self.x.x, self.y.x, self.z.x, origin.x],
@@ -224,8 +224,8 @@ impl UcsXform {
     }
 
     /// Full WCS → UCS-local transform, using `origin` as the local zero.
-    pub(crate) fn to_ucs_transform_at(&self, origin: glam::DVec3) -> acadrust::types::Transform {
-        use acadrust::types::{Matrix4, Transform};
+    pub(crate) fn to_ucs_transform_at(&self, origin: glam::DVec3) -> codec::types::Transform {
+        use codec::types::{Matrix4, Transform};
         Transform::from_matrix(Matrix4 {
             m: [
                 [self.x.x, self.x.y, self.x.z, -origin.dot(self.x)],
@@ -237,7 +237,7 @@ impl UcsXform {
     }
 
     /// Convert from the represented UCS into its canonical local frame.
-    pub(super) fn to_ucs_transform(&self) -> acadrust::types::Transform {
+    pub(super) fn to_ucs_transform(&self) -> codec::types::Transform {
         self.to_ucs_transform_at(self.origin)
     }
 }
@@ -274,9 +274,9 @@ pub(super) fn ucs_from_normal(origin: glam::DVec3, normal: glam::DVec3) -> Optio
     }
     let ((xx, xy, xz), (yx, yy, yz)) = crate::scene::view::transform::ocs_axes((z.x, z.y, z.z));
     let mut ucs = Ucs::new("*ACTIVE*");
-    ucs.origin = acadrust::types::Vector3::new(origin.x, origin.y, origin.z);
-    ucs.x_axis = acadrust::types::Vector3::new(xx, xy, xz);
-    ucs.y_axis = acadrust::types::Vector3::new(yx, yy, yz);
+    ucs.origin = codec::types::Vector3::new(origin.x, origin.y, origin.z);
+    ucs.x_axis = codec::types::Vector3::new(xx, xy, xz);
+    ucs.y_axis = codec::types::Vector3::new(yx, yy, yz);
     Some(ucs)
 }
 
@@ -285,9 +285,9 @@ pub(super) fn ucs_rotated_z(origin: glam::DVec3, angle_z: f32) -> Ucs {
     let cos = angle_z.cos() as f64;
     let sin = angle_z.sin() as f64;
     let mut ucs = Ucs::new("*ACTIVE*");
-    ucs.origin = acadrust::types::Vector3::new(origin.x, origin.y, origin.z);
-    ucs.x_axis = acadrust::types::Vector3::new(cos, sin, 0.0);
-    ucs.y_axis = acadrust::types::Vector3::new(-sin, cos, 0.0);
+    ucs.origin = codec::types::Vector3::new(origin.x, origin.y, origin.z);
+    ucs.x_axis = codec::types::Vector3::new(cos, sin, 0.0);
+    ucs.y_axis = codec::types::Vector3::new(-sin, cos, 0.0);
     ucs
 }
 
@@ -479,8 +479,8 @@ pub(super) fn axis_lock_apply(pt: glam::DVec3, base: glam::DVec3, dir: glam::DVe
 /// whole-drawing copy. The per-entity `min` corners give the exact enclosing
 /// box's lower-left.
 pub(super) fn entities_lower_left_by_bbox(
-    doc: &acadrust::CadDocument,
-    handles: &[acadrust::Handle],
+    doc: &codec::CadDocument,
+    handles: &[codec::Handle],
 ) -> glam::DVec3 {
     let mut min = glam::DVec3::splat(f64::INFINITY);
     let mut any = false;
@@ -514,12 +514,12 @@ pub(super) fn next_group_auto_name(scene: &crate::scene::Scene) -> String {
 
 // ── Entity type labels ─────────────────────────────────────────────────────
 
-pub(super) fn entity_type_label(entity: &acadrust::EntityType) -> String {
+pub(super) fn entity_type_label(entity: &codec::EntityType) -> String {
     crate::t!(crate::entities::names::ui_name_or_class(entity)).into_owned()
 }
 
-pub(super) fn entity_type_key(entity: &acadrust::EntityType) -> String {
-    use acadrust::EntityType::*;
+pub(super) fn entity_type_key(entity: &codec::EntityType) -> String {
+    use codec::EntityType::*;
     match entity {
         Point(_) => "point",
         Line(_) => "line",
@@ -622,7 +622,7 @@ mod ucs_from_normal_tests {
     use super::ucs_from_normal;
     use glam::DVec3;
 
-    fn axes(ucs: &acadrust::tables::Ucs) -> (DVec3, DVec3, DVec3) {
+    fn axes(ucs: &codec::tables::Ucs) -> (DVec3, DVec3, DVec3) {
         let x = DVec3::new(ucs.x_axis.x, ucs.x_axis.y, ucs.x_axis.z);
         let y = DVec3::new(ucs.y_axis.x, ucs.y_axis.y, ucs.y_axis.z);
         (x, y, x.cross(y))