Integrate persistent canvas controls with scenario lifetime rendering

crates/oa-desktop/src/workflow.rs

@@ -19,7 +19,7 @@ mod transition_tests;
 
 #[derive(Debug, Clone)]
 pub enum Event {
-    Semantic(crate::semantic_review::Event),
+    Semantic(Box<crate::semantic_review::Event>),
     Port(crate::port_workflow::Event),
     ExchangeItem(Id, bool),
     Endpoint(bool, EndpointChoice),
@@ -41,6 +41,11 @@ pub enum Event {
     Resolve(Id, TransitionField, FieldDecision),
     Preview,
 }
+impl Event {
+    pub fn semantic(event: crate::semantic_review::Event) -> Self {
+        Self::Semantic(Box::new(event))
+    }
+}
 pub enum Workflow {
     Semantic(Box<crate::semantic_review::State>),
     Ports(Box<crate::port_workflow::State>),