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 <[email protected]>

src/entities/attribute.rs

@@ -1,8 +1,8 @@
-use acadrust::entities::attribute_definition::{
+use codec::entities::attribute_definition::{
     HorizontalAlignment as AHA, MTextFlag, VerticalAlignment as AVA,
 };
-use acadrust::entities::{AttributeDefinition, AttributeEntity};
-use acadrust::types::Vector3;
+use codec::entities::{AttributeDefinition, AttributeEntity};
+use codec::types::Vector3;
 
 use crate::command::EntityTransform;
 use crate::entities::common::{edit_angle_prop as edit_angle, edit_prop as edit, parse_f64, ro_prop as ro, square_grip};
@@ -101,7 +101,7 @@ fn mtext_flag_str(f: MTextFlag) -> &'static str {
 /// Render text strokes for an attribute, honouring alignment, oblique angle,
 /// width factor, generation flags (backward / upside-down), text-style
 /// resolution, and basic multiline splitting on `\n` / `\\P`.
-fn build_attr_render(input: AttrTextInputs<'_>, document: &acadrust::CadDocument) -> RenderEntity {
+fn build_attr_render(input: AttrTextInputs<'_>, document: &codec::CadDocument) -> RenderEntity {
     let normal = (input.normal.x, input.normal.y, input.normal.z);
     let (wsx, wsy, wsz) = transform::ocs_point_to_wcs(
         (
@@ -290,7 +290,7 @@ fn build_attr_render(input: AttrTextInputs<'_>, document: &acadrust::CadDocument
             anchor_f64[0] - (anchor_local_x as f64 * cos_r - local_y_for_line as f64 * sin_r),
             anchor_f64[1] - (anchor_local_x as f64 * sin_r + local_y_for_line as f64 * cos_r),
         ];
-        // Parse `%%` codes through acadrust (same as TEXT), re-encoded for the
+        // Parse `%%` codes through opencadcodec (same as TEXT), re-encoded for the
         // stroke tessellator, so attribute text shares the one parser.
         let encoded = crate::entities::text::acad_text_encode(line);
         let (strokes, fill_tris) = lff::tessellate_text_ex(
@@ -338,7 +338,7 @@ fn build_attr_render(input: AttrTextInputs<'_>, document: &acadrust::CadDocument
 // ── AttributeDefinition ───────────────────────────────────────────────────────
 
 impl RenderConvertible for AttributeDefinition {
-    fn to_render(&self, document: &acadrust::CadDocument) -> Option<RenderEntity> {
+    fn to_render(&self, document: &codec::CadDocument) -> Option<RenderEntity> {
         // An attribute definition previews its tag when it has no default
         // value, so the placeholder is visible where a block will prompt for
         // input. (Passed as a non-empty value, so it renders as-is.)
@@ -627,7 +627,7 @@ impl Transformable for AttributeDefinition {
 // ── AttributeEntity ───────────────────────────────────────────────────────────
 
 impl RenderConvertible for AttributeEntity {
-    fn to_render(&self, document: &acadrust::CadDocument) -> Option<RenderEntity> {
+    fn to_render(&self, document: &codec::CadDocument) -> Option<RenderEntity> {
         Some(build_attr_render(
             AttrTextInputs {
                 value: &self.value,
@@ -874,7 +874,7 @@ impl Transformable for AttributeEntity {
     }
 }
 
-impl crate::entities::traits::TextContent for acadrust::entities::AttributeDefinition {
+impl crate::entities::traits::TextContent for codec::entities::AttributeDefinition {
     fn text_content(&self) -> Option<String> {
         Some(self.default_value.clone())
     }
@@ -886,7 +886,7 @@ impl crate::entities::traits::TextContent for acadrust::entities::AttributeDefin
     }
 }
 
-impl crate::entities::traits::TextContent for acadrust::entities::AttributeEntity {
+impl crate::entities::traits::TextContent for codec::entities::AttributeEntity {
     fn text_content(&self) -> Option<String> {
         Some(self.get_value().to_string())
     }