fix(presets): recompose surviving skills when a lower preset layer is removed

src/specify_cli/presets/_manager.py

@@ -895,6 +895,10 @@ def remove(self, pack_id: str) -> bool:
                 registered_commands = commands_to_unregister
 
         # Unregister non-skill command files from AI agents.
+        if registered_commands:
+            registered_commands = self._drop_survivor_owned_aliases(
+                pack_id, registered_commands
+            )
         if registered_commands:
             self._unregister_commands(registered_commands)