Complete freehand sketch workflow

src/command.rs

@@ -1818,6 +1818,13 @@ pub trait CadCommand: Send {
         false
     }
 
+    /// Drawing-persisted settings owned by the freehand sketch command.
+    /// The host mirrors them into the document header after every consumed
+    /// input so Type/Increment/Tolerance changes survive the command.
+    fn sketch_settings(&self) -> Option<(i16, f64, f64)> {
+        None
+    }
+
     /// Returns `true` when the active text prompt expects free-form prose
     /// that can legitimately contain whitespace (the body of a TEXT /
     /// MTEXT / DDEDIT entity, an attribute default value, etc.). For