Fix up merged PRs: right-click on the edited text box's frame selects that box

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crates/engine/src/tools.rs

@@ -998,7 +998,8 @@ impl Session {
                 | Hit::Adjust { id, .. }
                 | Hit::LineEnd { id, .. }
                 | Hit::Handle { id, .. }
-                | Hit::Vertex { id, .. },
+                | Hit::Vertex { id, .. }
+                | Hit::Frame { id },
             ) => Some(*id),
             None => None,
         };