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/app/document.rs

@@ -7,8 +7,8 @@ use crate::scene::{ObjectIsolationState, Scene};
 use crate::snap::SnapResult;
 use crate::t;
 use crate::ui::{LayerPanel, PropertiesPanel};
-use acadrust::tables::{normalize_name, Ucs};
-use acadrust::{CadDocument, EntityType, Handle};
+use codec::tables::{normalize_name, Ucs};
+use codec::{CadDocument, EntityType, Handle};
 use iced;
 use std::any::Any;
 use std::collections::HashMap;
@@ -118,7 +118,7 @@ pub(super) struct SketchSession {
     /// with snapping off gets that back rather than silently keeping it.
     pub(super) previous_snap_enabled: bool,
     /// Entity handles already present when the sketch opened.
-    pub(super) opened_with: std::collections::HashSet<acadrust::Handle>,
+    pub(super) opened_with: std::collections::HashSet<codec::Handle>,
 }
 
 // ── Per-document tab state ─────────────────────────────────────────────────
@@ -156,7 +156,7 @@ pub(super) struct DocumentTab {
     /// The selection set the most recent command worked on, captured when a
     /// finishing command drops the live selection — re-selectable with the
     /// "Previous" keyword at any Select objects prompt (#426).
-    pub(super) prev_selection: Vec<acadrust::Handle>,
+    pub(super) prev_selection: Vec<codec::Handle>,
     pub(super) last_cmd: Option<String>,
     /// Most recently created path drawable. A fresh LINE/PLINE can accept its
     /// current final endpoint with Enter before the first click.
@@ -178,7 +178,7 @@ pub(super) struct DocumentTab {
     /// Dynamic-block visibility grip for the current single selection.
     pub(super) visibility_grip: Option<super::visibility::VisibilityGrip>,
     pub(super) wireframe: bool,
-    pub(super) render_mode: acadrust::entities::ViewportRenderMode,
+    pub(super) render_mode: codec::entities::ViewportRenderMode,
     pub(super) visual_style: String,
     pub(super) last_cursor_world: glam::DVec3,
     pub(super) last_cursor_screen: iced::Point,
@@ -206,6 +206,8 @@ pub(super) struct DocumentTab {
     pub(super) dyn_active: usize,
     pub(super) history: HistoryState,
     pub(super) active_layer: String,
+    /// Node graph shown by the command line's graph button.
+    pub(super) graph: crate::ui::node_graph::Graph,
     /// Currently active UCS. `None` means WCS (identity transform).
     pub(super) active_ucs: Option<Ucs>,
     /// Open sketch, if CREATESKETCH is in effect. `None` is the normal
@@ -356,7 +358,7 @@ impl DocumentTab {
     /// when the viewport uses world coordinates or the handle is not a viewport.
     pub(super) fn ucs_from_viewport(&self, h: Handle) -> Option<Ucs> {
         let vp = match self.scene.document.get_entity(h) {
-            Some(acadrust::EntityType::Viewport(vp)) => vp,
+            Some(codec::EntityType::Viewport(vp)) => vp,
             _ => return None,
         };
         if !vp.ucs_per_viewport {
@@ -385,7 +387,7 @@ impl DocumentTab {
 
     pub(super) fn ucs_from_layout(&self) -> Option<Ucs> {
         let layout = self.scene.document.objects.values().find_map(|object| {
-            let acadrust::objects::ObjectType::Layout(layout) = object else {
+            let codec::objects::ObjectType::Layout(layout) = object else {
                 return None;
             };
             (layout.name == self.scene.current_layout).then_some(layout)
@@ -398,17 +400,17 @@ impl DocumentTab {
             .find(|ucs| ucs.handle == layout.named_ucs)
             .cloned()
             .unwrap_or_else(|| Ucs::new("*PAPERUCS*"));
-        ucs.origin = acadrust::types::Vector3::new(
+        ucs.origin = codec::types::Vector3::new(
             layout.ucs_origin.0,
             layout.ucs_origin.1,
             layout.ucs_origin.2,
         );
-        ucs.x_axis = acadrust::types::Vector3::new(
+        ucs.x_axis = codec::types::Vector3::new(
             layout.ucs_x_axis.0,
             layout.ucs_x_axis.1,
             layout.ucs_x_axis.2,
         );
-        ucs.y_axis = acadrust::types::Vector3::new(
+        ucs.y_axis = codec::types::Vector3::new(
             layout.ucs_y_axis.0,
             layout.ucs_y_axis.1,
             layout.ucs_y_axis.2,
@@ -450,7 +452,7 @@ impl DocumentTab {
     }
 
     fn sync_paper_ucs_header(&mut self) {
-        use acadrust::types::Vector3;
+        use codec::types::Vector3;
         let header = &mut self.scene.document.header;
         match &self.active_ucs {
             Some(ucs) => {
@@ -485,7 +487,7 @@ impl DocumentTab {
     /// entered viewport's per-viewport UCS fields, or the document header's
     /// model-space UCS in the Model tab, or the layout UCS. Call after a change.
     pub(super) fn persist_active_ucs(&mut self) {
-        use acadrust::types::Vector3;
+        use codec::types::Vector3;
         if let Some(index) = self.active_block_edit {
             let active_ucs = self.active_ucs.clone();
             if let Some(session) = self.block_edits.get_mut(index) {
@@ -502,7 +504,7 @@ impl DocumentTab {
                     false,
                 ),
             };
-            if let Some(acadrust::EntityType::Viewport(vp)) = self.scene.document.get_entity_mut(h)
+            if let Some(codec::EntityType::Viewport(vp)) = self.scene.document.get_entity_mut(h)
             {
                 vp.ucs_origin = o;
                 vp.ucs_x_axis = x;
@@ -552,7 +554,7 @@ impl DocumentTab {
                 ),
             };
             for object in self.scene.document.objects.values_mut() {
-                let acadrust::objects::ObjectType::Layout(layout) = object else {
+                let codec::objects::ObjectType::Layout(layout) = object else {
                     continue;
                 };
                 if layout.name == self.scene.current_layout {
@@ -629,7 +631,7 @@ impl DocumentTab {
             selected_handle: None,
             visibility_grip: None,
             wireframe: false,
-            render_mode: acadrust::entities::ViewportRenderMode::Wireframe2D,
+            render_mode: codec::entities::ViewportRenderMode::Wireframe2D,
             visual_style: "Wireframe 2D".into(),
             last_cursor_world: glam::DVec3::ZERO,
             last_cursor_screen: iced::Point::ORIGIN,
@@ -642,6 +644,7 @@ impl DocumentTab {
             dyn_active: 0,
             history: HistoryState::default(),
             active_layer: "0".to_string(),
+            graph: Default::default(),
             active_ucs: None,
             sketch_session: None,
             sketch_count: 0,
@@ -815,11 +818,11 @@ pub(super) enum StructureSnapshot {
     /// Compatibility fallback for genuinely broad structural commands.
     Full(CadDocument),
     /// Exact layer-table entries touched by one command.
-    Layers(Vec<TableEntryDelta<acadrust::tables::Layer>>),
+    Layers(Vec<TableEntryDelta<codec::tables::Layer>>),
     /// Exact text-style entries touched by one command.
-    TextStyles(Vec<TableEntryDelta<acadrust::tables::TextStyle>>),
+    TextStyles(Vec<TableEntryDelta<codec::tables::TextStyle>>),
     /// Exact dimension-style entries touched by one command.
-    DimStyles(Vec<TableEntryDelta<acadrust::tables::DimStyle>>),
+    DimStyles(Vec<TableEntryDelta<codec::tables::DimStyle>>),
     /// Exact object-map entries touched by one command. This supports commands
     /// such as groups/dictionaries without retaining every unrelated object.
     Objects(Vec<ObjectEntryDelta>),
@@ -863,8 +866,8 @@ pub(super) struct TableEntryDelta<T> {
 #[derive(Clone)]
 pub(super) struct ObjectEntryDelta {
     pub(super) handle: Handle,
-    pub(super) before: Option<acadrust::objects::ObjectType>,
-    pub(super) after: Option<acadrust::objects::ObjectType>,
+    pub(super) before: Option<codec::objects::ObjectType>,
+    pub(super) after: Option<codec::objects::ObjectType>,
 }
 
 /// One parametric-constraint scope's before/after image within an entity delta.
@@ -890,5 +893,5 @@ pub(super) struct PendingHistorySnapshot {
     pub(super) selected_before: Vec<Handle>,
     pub(super) dirty_before: bool,
     pub(super) structure_before: CadDocument,
-    pub(super) recorder: Arc<acadrust::document::EntityChangeRecorder>,
+    pub(super) recorder: Arc<codec::document::EntityChangeRecorder>,
 }