Enable direct and menu bend editing in State diagrams

crates/oa-desktop/src/model_menu.rs

@@ -14,6 +14,7 @@ pub struct Request {
     pub placement: Option<Id>,
     pub bend: Option<usize>,
     pub route_point: Option<Position>,
+    pub route_segment: Option<(usize, Position)>,
     pub creation_point: Option<Position>,
     pub canvas: Option<route_edit::Context>,
     pub source_file: Option<String>,
@@ -26,6 +27,7 @@ impl Request {
             placement: None,
             bend: None,
             route_point: None,
+            route_segment: None,
             creation_point: None,
             canvas: None,
             source_file: None,