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/io/recovery.rs

@@ -22,7 +22,7 @@ pub struct RecoveryReport {
     pub source_path: Option<PathBuf>,
     pub size_bytes: u64,
     pub source_sha256: Option<String>,
-    pub read_stats: Option<acadrust::ReadStats>,
+    pub read_stats: Option<codec::ReadStats>,
     pub entities_scanned: usize,
     pub entities_removed: usize,
     pub referenced_entities_removed: usize,
@@ -35,7 +35,7 @@ pub struct RecoveryReport {
     pub references_failed: usize,
     pub references_skipped: usize,
     pub reference_details: Vec<(String, String, String, Option<String>)>,
-    pub reference_stats: Vec<(String, acadrust::ReadStats)>,
+    pub reference_stats: Vec<(String, codec::ReadStats)>,
     pub timings: OpenTimings,
     pub total_ms: u32,
     pub failure_phase: Option<String>,
@@ -52,12 +52,12 @@ impl RecoveryReport {
         path: &Path,
         size_bytes: u64,
         source_sha256: Option<String>,
-        read_stats: Option<acadrust::ReadStats>,
+        read_stats: Option<codec::ReadStats>,
         entities_scanned: usize,
         entities_removed: usize,
         referenced_entities_removed: usize,
         references: &[XrefInfo],
-        notifications: &acadrust::notification::NotificationCollection,
+        notifications: &codec::notification::NotificationCollection,
         save_as_required: bool,
         timings: OpenTimings,
         total_ms: u32,
@@ -124,7 +124,7 @@ impl RecoveryReport {
                     .iter()
                     .filter(|item| {
                         item.notification_type
-                            == acadrust::notification::NotificationType::Error
+                            == codec::notification::NotificationType::Error
                     })
                     .count()
             });
@@ -193,7 +193,7 @@ impl RecoveryReport {
         file_name: String,
         size_bytes: u64,
         source_sha256: Option<String>,
-        read_stats: Option<acadrust::ReadStats>,
+        read_stats: Option<codec::ReadStats>,
         failure_phase: String,
         error: String,
         total_ms: u32,
@@ -259,7 +259,7 @@ impl RecoveryReport {
         lines.push(format!("Application revision: {}", env!("OCS_GIT_REV")));
         lines.push(format!("Build profile: {}", env!("OCS_BUILD_PROFILE")));
         lines.push(format!("Build features: {}", env!("OCS_BUILD_FEATURES")));
-        lines.push(format!("Reader version: {}", acadrust::VERSION));
+        lines.push(format!("Reader version: {}", codec::VERSION));
         lines.push(format!("Reader revision: {}", reader_revision()));
         lines.push(format!("Platform: {}", diagnostic_platform()));
         lines.push(format!("Created (Unix seconds): {}", self.created_unix_seconds));
@@ -543,7 +543,7 @@ fn redact_source_path(message: &str, source: Option<&Path>) -> String {
     redacted
 }
 
-fn structured_diagnostic_line(diagnostic: &acadrust::ReadDiagnostic) -> String {
+fn structured_diagnostic_line(diagnostic: &codec::ReadDiagnostic) -> String {
     let section = diagnostic.section.as_deref().unwrap_or("-");
     let offset = diagnostic
         .source_offset
@@ -579,7 +579,7 @@ fn structured_diagnostic_line(diagnostic: &acadrust::ReadDiagnostic) -> String {
 fn reader_revision() -> String {
     include_str!("../../Cargo.toml")
         .lines()
-        .find(|line| line.trim_start().starts_with("acadrust = { git ="))
+        .find(|line| line.trim_start().starts_with("opencadcodec = { git ="))
         .and_then(|line| line.split("rev = \"").nth(1))
         .and_then(|value| value.split('"').next())
         .filter(|value| !value.is_empty())