fix: remove redundant import in _switch_project (mcp_client already imported at top)

src/app_controller.py

@@ -2347,7 +2347,6 @@ class AppController:
    self.ai_status = f"failed to load project: {e}"
    return
   self._refresh_from_project()
-  import mcp_client
   file_items_as_dicts = [{"path": f.path if hasattr(f, "path") else str(f)} for f in self.files]
   mcp_client.configure(file_items_as_dicts, [str(new_root)])
   self.ai_status = f"switched to: {Path(path).stem}"