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/multileader.rs

@@ -1,9 +1,9 @@
-use acadrust::entities::{
+use codec::entities::{
     BlockContentConnectionType, FlowDirectionType, LeaderContentType, LineSpacingStyle,
     MultiLeader, MultiLeaderPathType, MultiLeaderPropertyOverrideFlags, TextAlignmentType,
     TextAttachmentDirectionType, TextAttachmentType,
 };
-use cadkernel::geom2d::Transform;
+use kernel::geom2d::Transform;
 
 use crate::entities::text_support::{
     layout_mtext, resolve_text_style, MTextRenderOpts, MTextVAnchor, ResolvedTextStyle,
@@ -36,7 +36,7 @@ use glam::DVec3;
 /// vertically-attached leaders (picked by which side the leader comes from),
 /// the left attachment otherwise. Shared by the render and the grips.
 pub(crate) fn active_vertical_attachment(ml: &MultiLeader) -> TextAttachmentType {
-    use acadrust::entities::multileader::TextAttachmentDirectionType;
+    use codec::entities::multileader::TextAttachmentDirectionType;
     match ml.text_attachment_direction {
         TextAttachmentDirectionType::Vertical => {
             let from_top = ml
@@ -95,9 +95,9 @@ pub(crate) fn catmull_rom_pts(ctrl: &[[f64; 3]], segs_per_span: u32) -> Vec<[f64
     out
 }
 
-fn to_render(ml: &MultiLeader, document: &acadrust::CadDocument) -> Option<RenderEntity> {
+fn to_render(ml: &MultiLeader, document: &codec::CadDocument) -> Option<RenderEntity> {
     let nan = [f64::NAN; 3];
-    let p3 = |v: &acadrust::types::Vector3| -> [f64; 3] { [v.x, v.y, v.z] };
+    let p3 = |v: &codec::types::Vector3| -> [f64; 3] { [v.x, v.y, v.z] };
 
     let arrow_size = ml.context.arrowhead_size;
     let draw_arrow = arrow_size > 0.0;
@@ -185,9 +185,9 @@ fn to_render(ml: &MultiLeader, document: &acadrust::CadDocument) -> Option<Rende
                 // Side-anchored on the leader-facing edge so the text reads
                 // outward; flips live with the leader/text side.
                 attach_h_anchor: match ctx.text_attachment_point {
-                    acadrust::entities::multileader::TextAttachmentPointType::Left => 0.0,
-                    acadrust::entities::multileader::TextAttachmentPointType::Center => 0.5,
-                    acadrust::entities::multileader::TextAttachmentPointType::Right => 1.0,
+                    codec::entities::multileader::TextAttachmentPointType::Left => 0.0,
+                    codec::entities::multileader::TextAttachmentPointType::Center => 0.5,
+                    codec::entities::multileader::TextAttachmentPointType::Right => 1.0,
                 },
                 v_anchor: mleader_v_anchor(
                     if text_sign >= 0.0 {
@@ -199,7 +199,7 @@ fn to_render(ml: &MultiLeader, document: &acadrust::CadDocument) -> Option<Rende
                 line_spacing_factor: ctx.line_spacing_factor as f32,
                 exact_line_spacing: matches!(
                     ctx.line_spacing_style,
-                    acadrust::entities::LineSpacingStyle::Exactly
+                    codec::entities::LineSpacingStyle::Exactly
                 ),
                 rectangle_height: 0.0,
                 vertical_text: false,
@@ -391,12 +391,12 @@ fn text_box_geom(ml: &MultiLeader) -> ([f64; 2], [f64; 3]) {
     }
     let vertical = matches!(
         ctx.text_flow_direction,
-        acadrust::entities::multileader::FlowDirectionType::Vertical
+        codec::entities::multileader::FlowDirectionType::Vertical
     );
     let h_anchor: f32 = match ctx.text_attachment_point {
-        acadrust::entities::multileader::TextAttachmentPointType::Left => 0.0,
-        acadrust::entities::multileader::TextAttachmentPointType::Center => 0.5,
-        acadrust::entities::multileader::TextAttachmentPointType::Right => 1.0,
+        codec::entities::multileader::TextAttachmentPointType::Left => 0.0,
+        codec::entities::multileader::TextAttachmentPointType::Center => 0.5,
+        codec::entities::multileader::TextAttachmentPointType::Right => 1.0,
     };
     let (dir_v, k) = crate::entities::text_support::flow_grip_axis(
         rot,
@@ -434,7 +434,7 @@ fn text_box_geom(ml: &MultiLeader) -> ([f64; 2], [f64; 3]) {
             line_spacing_factor: ctx.line_spacing_factor as f32,
             exact_line_spacing: matches!(
                 ctx.line_spacing_style,
-                acadrust::entities::LineSpacingStyle::Exactly
+                codec::entities::LineSpacingStyle::Exactly
             ),
             rectangle_height: 0.0,
             vertical_text: vertical,
@@ -534,7 +534,7 @@ fn mleader_landing_geom(
 }
 
 fn set_mleader_text_location(ml: &mut MultiLeader, location: DVec3) {
-    let location = acadrust::types::Vector3::new(location.x, location.y, location.z);
+    let location = codec::types::Vector3::new(location.x, location.y, location.z);
     ml.context.text_location = location;
     ml.context.content_base_point = location;
 }
@@ -704,9 +704,9 @@ fn apply_grip(
                 old_sign
             };
             ml.context.text_attachment_point = if new_sign >= 0.0 {
-                acadrust::entities::multileader::TextAttachmentPointType::Left
+                codec::entities::multileader::TextAttachmentPointType::Left
             } else {
-                acadrust::entities::multileader::TextAttachmentPointType::Right
+                codec::entities::multileader::TextAttachmentPointType::Right
             };
             set_mleader_text_location(ml, target + axis * (new_sign * (dogleg + gap)));
 
@@ -872,7 +872,7 @@ fn choice(label: &str, field: &'static str, selected: &str, opts: &[&str]) -> Pr
     }
 }
 
-fn hexh(h: Option<acadrust::Handle>) -> String {
+fn hexh(h: Option<codec::Handle>) -> String {
     match h {
         Some(h) if !h.is_null() => format!("{:X}", h.value()),
         _ => "(none)".to_string(),
@@ -1135,7 +1135,7 @@ fn apply_geom_prop(ml: &mut MultiLeader, field: &str, value: &str) {
                 for line in &mut root.lines {
                     line.path_type = ml.path_type;
                     line.override_flags.insert(
-                        acadrust::entities::LeaderLinePropertyOverrideFlags::PATH_TYPE,
+                        codec::entities::LeaderLinePropertyOverrideFlags::PATH_TYPE,
                     );
                 }
             }
@@ -1215,7 +1215,7 @@ fn apply_geom_prop(ml: &mut MultiLeader, field: &str, value: &str) {
                     for line in &mut root.lines {
                         line.arrowhead_size = v;
                         line.override_flags.insert(
-                            acadrust::entities::LeaderLinePropertyOverrideFlags::ARROWHEAD_SIZE,
+                            codec::entities::LeaderLinePropertyOverrideFlags::ARROWHEAD_SIZE,
                         );
                     }
                 }
@@ -1288,7 +1288,7 @@ fn apply_geom_prop(ml: &mut MultiLeader, field: &str, value: &str) {
         "block_scale" => {
             if let Some(v) = f64(value) {
                 if v > 0.0 {
-                    ml.block_scale = acadrust::types::Vector3::new(v, v, v);
+                    ml.block_scale = codec::types::Vector3::new(v, v, v);
                     ml.context.block_content_scale = ml.block_scale;
                     ml.property_override_flags
                         .insert(MultiLeaderPropertyOverrideFlags::BLOCK_CONTENT_SCALE);
@@ -1395,7 +1395,7 @@ fn apply_geom_prop(ml: &mut MultiLeader, field: &str, value: &str) {
         "text_rotation" => {
             if let Some(v) = f64(value) {
                 ml.context.text_rotation = v.to_radians();
-                ml.context.text_direction = acadrust::types::Vector3::new(
+                ml.context.text_direction = codec::types::Vector3::new(
                     ml.context.text_rotation.cos(),
                     ml.context.text_rotation.sin(),
                     0.0,
@@ -1434,7 +1434,7 @@ fn place_content_after_landing(ml: &mut MultiLeader) {
         (1.0, 0.0)
     };
     let distance = root.landing_distance.max(0.0) + ml.context.landing_gap.max(0.0);
-    let location = acadrust::types::Vector3::new(
+    let location = codec::types::Vector3::new(
         root.connection_point.x + ux * distance,
         root.connection_point.y + uy * distance,
         root.connection_point.z,
@@ -1546,7 +1546,7 @@ fn reflect_xy_direction(dx: &mut f64, dy: &mut f64, p1: DVec3, p2: DVec3) {
 // ── Trait impls ────────────────────────────────────────────────────────────
 
 impl RenderConvertible for MultiLeader {
-    fn to_render(&self, document: &acadrust::CadDocument) -> Option<RenderEntity> {
+    fn to_render(&self, document: &codec::CadDocument) -> Option<RenderEntity> {
         to_render(self, document)
     }
 }
@@ -1640,7 +1640,7 @@ impl crate::entities::traits::Grippable for MultiLeader {
         use crate::scene::model::object::GripMenuAction as A;
         // Locate the (root, line) and vertex position owning this grip id.
         let mut idx = 0usize;
-        let mut loc: Option<(usize, usize, acadrust::types::Vector3)> = None;
+        let mut loc: Option<(usize, usize, codec::types::Vector3)> = None;
         'find: for (ri, root) in self.context.leader_roots.iter().enumerate() {
             for (li, line) in root.lines.iter().enumerate() {
                 let n = line.points.len();
@@ -1675,7 +1675,7 @@ impl crate::entities::traits::Grippable for MultiLeader {
                 // below the picked vertex; the user drags it to the final spot.
                 let _ = ri;
                 let off = self.text_height.max(1.0) * 4.0;
-                let arrow = acadrust::types::Vector3::new(vpos.x, vpos.y - off, vpos.z);
+                let arrow = codec::types::Vector3::new(vpos.x, vpos.y - off, vpos.z);
                 if let Some(root) = self.context.leader_roots.last_mut() {
                     root.create_line(vec![arrow]);
                 }
@@ -1701,9 +1701,9 @@ impl crate::entities::traits::Transformable for MultiLeader {
 }
 
 pub(crate) fn block_content_insert(
-    document: &acadrust::CadDocument,
+    document: &codec::CadDocument,
     ml: &MultiLeader,
-) -> Option<acadrust::entities::Insert> {
+) -> Option<codec::entities::Insert> {
     if ml.content_type != LeaderContentType::Block || !ml.context.has_block_contents {
         return None;
     }
@@ -1742,7 +1742,7 @@ pub(crate) fn block_content_insert(
             insertion.y -= rotated[1];
         }
     }
-    let mut insert = acadrust::entities::Insert::new(record.name.clone(), insertion);
+    let mut insert = codec::entities::Insert::new(record.name.clone(), insertion);
     insert.set_x_scale(ml.block_scale.x);
     insert.set_y_scale(ml.block_scale.y);
     insert.set_z_scale(ml.block_scale.z);
@@ -1762,14 +1762,14 @@ pub(crate) fn block_content_insert(
 pub trait MultiLeaderTess {
     fn tessellate(
         &self,
-        document: &acadrust::CadDocument,
-        handle: acadrust::Handle,
+        document: &codec::CadDocument,
+        handle: codec::Handle,
         selected: bool,
         entity_color: [f32; 4],
         line_weight_px: f32,
         anno_scale: f32,
-        active_viewport: Option<acadrust::Handle>,
-        annotation_scale_handle: Option<acadrust::Handle>,
+        active_viewport: Option<codec::Handle>,
+        annotation_scale_handle: Option<codec::Handle>,
         block_cache: Option<&crate::scene::cache::block_cache::BlockCache>,
         view_aabb: Option<[f32; 4]>,
         world_per_pixel: Option<f32>,
@@ -1780,14 +1780,14 @@ pub trait MultiLeaderTess {
 impl MultiLeaderTess for MultiLeader {
     fn tessellate(
         &self,
-        document: &acadrust::CadDocument,
-        handle: acadrust::Handle,
+        document: &codec::CadDocument,
+        handle: codec::Handle,
         selected: bool,
         entity_color: [f32; 4],
         line_weight_px: f32,
         anno_scale: f32,
-        active_viewport: Option<acadrust::Handle>,
-        annotation_scale_handle: Option<acadrust::Handle>,
+        active_viewport: Option<codec::Handle>,
+        annotation_scale_handle: Option<codec::Handle>,
         block_cache: Option<&crate::scene::cache::block_cache::BlockCache>,
         view_aabb: Option<[f32; 4]>,
         world_per_pixel: Option<f32>,
@@ -1810,7 +1810,7 @@ impl MultiLeaderTess for MultiLeader {
         // (ByLayer/ByBlock/Default) fall through to the entity's already-resolved
         // pixel width.
         let leader_lw_px = match ml.line_weight {
-            acadrust::types::LineWeight::Value(v) if v >= 0 => (v as f32 / 100.0) * (96.0 / 25.4),
+            codec::types::LineWeight::Value(v) if v >= 0 => (v as f32 / 100.0) * (96.0 / 25.4),
             _ => line_weight_px,
         };
         // ml.line_type_handle — resolve via line_types table by handle and apply
@@ -1835,7 +1835,7 @@ impl MultiLeaderTess for MultiLeader {
 
         let name = handle.value().to_string();
         let nan = [f32::NAN; 3];
-        let p3 = |v: &acadrust::types::Vector3| -> [f32; 3] {
+        let p3 = |v: &codec::types::Vector3| -> [f32; 3] {
             [(v.x) as f32, (v.y) as f32, (v.z) as f32]
         };
 
@@ -1909,7 +1909,7 @@ impl MultiLeaderTess for MultiLeader {
                 let anchor = root.connection_point;
                 let k = context_scale_correction as f64;
 
-                text_loc_w = acadrust::types::Vector3::new(
+                text_loc_w = codec::types::Vector3::new(
                     anchor.x
                         + (text_loc_w.x - anchor.x) * k,
                     anchor.y
@@ -2014,7 +2014,7 @@ impl MultiLeaderTess for MultiLeader {
             // Vertically attached leaders meet the text edge directly.
             let vertical_attach = matches!(
                 ml.text_attachment_direction,
-                acadrust::entities::multileader::TextAttachmentDirectionType::Vertical
+                codec::entities::multileader::TextAttachmentDirectionType::Vertical
             );
             if ml.enable_landing
                 && ml.enable_dogleg
@@ -2107,7 +2107,7 @@ impl MultiLeaderTess for MultiLeader {
             fill_tris_low: Vec::new(),
         });
 
-        let host = acadrust::EntityType::MultiLeader(ml.clone());
+        let host = codec::EntityType::MultiLeader(ml.clone());
         for block_use in crate::scene::render_graph::entity_render_block_uses(document, &host, 1.0)
             .into_iter()
             .filter(|block_use| {
@@ -2218,7 +2218,7 @@ impl MultiLeaderTess for MultiLeader {
             // The stored text attachment point is the insertion's horizontal
             // anchor within the text block (Left/Center/Right) — honour it
             // instead of guessing from the leader side.
-            use acadrust::entities::multileader::{
+            use codec::entities::multileader::{
                 TextAttachmentDirectionType,
             };
             // The context's attachment point exists in every DWG version;
@@ -2258,13 +2258,13 @@ impl MultiLeaderTess for MultiLeader {
                 line_spacing_factor: ctx.line_spacing_factor as f32,
                 exact_line_spacing: matches!(
                     ctx.line_spacing_style,
-                    acadrust::entities::LineSpacingStyle::Exactly
+                    codec::entities::LineSpacingStyle::Exactly
                 ),
                 rectangle_height: 0.0,
                 // Vertical flow (top-to-bottom) is stored per-context.
                 vertical_text: matches!(
                     ctx.text_flow_direction,
-                    acadrust::entities::multileader::FlowDirectionType::Vertical
+                    codec::entities::multileader::FlowDirectionType::Vertical
                 ),
                 want_glyph_boxes: false,
             });
@@ -2425,7 +2425,7 @@ impl MultiLeaderTess for MultiLeader {
             // the leader visually continues under the text, so draw a rule the
             // full text width at the attached line, in the leader's colour.
             {
-                use acadrust::entities::multileader::TextAttachmentType as TA;
+                use codec::entities::multileader::TextAttachmentType as TA;
                 let ul_lines: Option<Vec<usize>> = match vertical_attach {
                     TA::BottomOfTopLineUnderlineTopLine => Some(vec![0]),
                     TA::BottomOfTopLineUnderlineAll => {
@@ -2636,7 +2636,7 @@ impl MultiLeaderTess for MultiLeader {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use acadrust::CadDocument;
+    use codec::CadDocument;
 
     #[test]
     fn test_mleader_arabic_text_tessellation() {
@@ -2649,7 +2649,7 @@ mod tests {
 
         let wires = ml.tessellate(
             &doc,
-            acadrust::Handle::default(),
+            codec::Handle::default(),
             false,
             [1.0, 1.0, 1.0, 1.0],
             1.0,