refactor(commands): plugin dispatch ends through finish_dispatch

The branch added by #1498 repeated finish_dispatch's focus and dynamic-input sync; call it instead.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/app/commands/mod.rs

@@ -201,11 +201,8 @@ impl OpenCADStudio {
             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 self.finish_dispatch(cmd);
         }
 
         // Command families are dispatched in source order (see