Revert "Match Smooth connected-endpoint workflow"

This reverts commit dfa75f45b5.

src/app/command_driver.rs

@@ -849,36 +849,6 @@ impl OpenCADStudio {
     /// command, so `was_active` is false and their selection is preserved.
     pub(super) fn apply_cmd_result(&mut self, mut result: CmdResult) -> Task<Message> {
         let i = self.active_tab;
-        if let CmdResult::AddParametricConstraint {
-            kind,
-            refs,
-            ..
-        } = &mut result
-        {
-            if *kind == crate::scene::parametric_constraints::ConstraintKind::Smooth
-                && refs.len() == 1
-            {
-                let source = refs[0];
-                let scope = self.tabs[i].current_parametric_scope();
-                let Some(resolved) = self.tabs[i]
-                    .scene
-                    .smooth_refs_from_connected_spline(scope, source.entity, source.marker)
-                else {
-                    self.tabs[i].snap_result = None;
-                    self.command_line
-                        .push_error("No valid constraint point found.");
-                    if let Some(prompt) = self.tabs[i]
-                        .active_cmd
-                        .as_ref()
-                        .map(|command| command.prompt())
-                    {
-                        self.command_line.push_info(&prompt);
-                    }
-                    return Task::none();
-                };
-                *refs = resolved;
-            }
-        }
         if let CmdResult::ReturnPoint(pt) = result {
             self.tabs[i].scene.clear_preview_wire();
             if let Some(mut suspended) = self.tabs[i].suspended_cmd.take() {