feat:(BEDIT) : add Polar Stretch block action authoring and evaluation

Enable Polar Stretch actions through the authoring palette and BACTION command. Persist native action data, edit target selections and frames, and evaluate parameter-driven displacement on block references.

src/app/block_actions.rs

@@ -95,7 +95,7 @@ impl OpenCADStudio {
         };
         if !args.is_empty() && kind.is_none() {
             self.command_line.push_error(
-                crate::t!("Supported actions: Move, Scale, Stretch, Rotate, Flip, Array. Other action types are not wired yet.")
+                crate::t!("Supported actions: Move, Scale, Stretch, Polar Stretch, Rotate, Flip, Array. Other action types are not wired yet.")
                     .as_ref(),
             );
             return Task::none();

src/app/commands/mod.rs

@@ -181,7 +181,10 @@ impl OpenCADStudio {
                 return Task::none();
             }
         }
-        if matches!(cmd.split(' ').next(), Some("BACTION" | "BACTIONTOOL" | "BARRAY")) {
+        if matches!(
+            cmd.split(' ').next(),
+            Some("BACTION" | "BACTIONTOOL" | "BARRAY")
+        ) {
             let args = if cmd == "BARRAY" || cmd.starts_with("BARRAY ") {
                 "ARRAY"
             } else {
@@ -190,7 +193,7 @@ impl OpenCADStudio {
             if !args.is_empty() && crate::scene::block_actions::Kind::parse(args).is_none() {
                 self.command_line.push_error(
                     crate::t!(
-                        "Supported actions: Move, Scale, Stretch, Rotate, Flip, Array. Other action types are not wired yet."
+                        "Supported actions: Move, Scale, Stretch, Polar Stretch, Rotate, Flip, Array. Other action types are not wired yet."
                     )
                     .as_ref(),
                 );

src/app/dock/view.rs

@@ -416,6 +416,7 @@ impl OpenCADStudio {
                     self.action_error(Some(crate::scene::block_actions::Kind::Rotate)),
                     self.action_error(Some(crate::scene::block_actions::Kind::Flip)),
                     self.action_error(Some(crate::scene::block_actions::Kind::Stretch)),
+                    self.action_error(Some(crate::scene::block_actions::Kind::PolarStretch)),
                     self.action_error(Some(crate::scene::block_actions::Kind::Array)),
                 )
             }