fix(commands): record last_cmd on plugin dispatch to repeat on Enter

When a plugin command was dispatched, record_recent was called but
tabs[i].last_cmd was never set. Consequently, pressing Enter or Space on
an empty command line after running a plugin command failed to repeat it.

This records tabs[i].last_cmd on plugin dispatch and requests command-line
focus and dynamic input syncing when an interactive plugin command starts.

src/app/command_driver/utilities.rs

@@ -731,6 +731,8 @@ impl OpenCADStudio {
         // (`LINE`), so the full line is not a plugin command and falls through to
         // the first-word + fed-tokens path below. (#162)
         if !self.suppress_plugin_dispatch && crate::plugin::try_dispatch(self, i, cmd) {
+            self.tabs[i].last_cmd = Some(cmd.to_string());
+            self.command_line.record_recent(cmd);
             let toks: Vec<String> = tokens.iter().map(|s| s.to_string()).collect();
             return self.finish_active_command(&toks, finish);
         }

src/app/commands/mod.rs

@@ -197,11 +197,15 @@ impl OpenCADStudio {
             // tool was a one-shot and we must turn the ribbon highlight off here —
             // normally apply_cmd_result does that, but plugin dispatch can return
             // without producing a CmdResult.
+            self.tabs[i].last_cmd = Some(cmd.to_string());
             self.command_line.record_recent(cmd);
             if self.tabs[i].active_cmd.is_none() {
                 self.ribbon.deactivate_tool();
+                return Task::none();
+            } else {
+                self.sync_dyn_fields();
+                return self.focus_cmd_input();
             }
-            return Task::none();
         }
 
         // Command families are dispatched in source order (see
@@ -822,7 +826,7 @@ inventory::submit!(crate::command::CommandRegistration {
 
 #[cfg(test)]
 mod marquee_cancel_tests {
-    use crate::app::{GripPendingValue, OpenCADStudio};
+    use crate::app::{GripPendingValue, Message, OpenCADStudio};
     use crate::scene::model::object::GripMenuAction;
     use crate::scene::pick::grip::GripEdit;
     use codec::Handle;
@@ -968,4 +972,39 @@ mod marquee_cancel_tests {
             Some("LINE")
         );
     }
+
+    #[test]
+    fn command_finalize_repeats_last_cmd() {
+        let mut app = fresh();
+        let i = app.active_tab;
+        assert_eq!(app.tabs[i].last_cmd, None);
+
+        // Run LINE command
+        let _ = app.dispatch_command("LINE");
+        assert_eq!(app.tabs[i].last_cmd.as_deref(), Some("LINE"));
+
+        // Cancel LINE with Escape
+        let _ = app.update(Message::CommandEscape);
+        assert!(app.tabs[i].active_cmd.is_none());
+        assert_eq!(app.tabs[i].last_cmd.as_deref(), Some("LINE"));
+
+        // Press Enter (CommandFinalize) on empty command line repeats LINE
+        let _ = app.update(Message::CommandFinalize);
+        assert_eq!(
+            app.tabs[i].active_cmd.as_deref().map(|cmd| cmd.name()),
+            Some("LINE")
+        );
+    }
+
+    #[test]
+    fn empty_enter_repeats_plugin_command() {
+        let mut app = fresh();
+        let i = app.active_tab;
+        app.tabs[i].last_cmd = Some("TARC".to_string());
+
+        // When idle, CommandFinalize repeats last_cmd
+        let _ = app.update(Message::CommandFinalize);
+        // Confirms TARC was re-dispatched when empty Enter was pressed
+        assert!(app.command_line.last_error.as_deref().unwrap_or("").contains("TARC"));
+    }
 }