Mouse clicks anywhere break the application #54

  File "/opt/anaconda3/bin/mlb-cli", line 7, in <module>
    sys.exit(main())
             ~~~~^^
  File "/Users/conorcleary/projects/gemini_projects/mlb-cli-py/app/mlb_cli.py", line 330, in main
    app.run()
    ~~~~~~~^^
  File "/Users/conorcleary/projects/gemini_projects/mlb-cli-py/app/mlb_cli.py", line 297, in run
    with self.manager:
         ^^^^^^^^^^^^
  File "/opt/anaconda3/lib/python3.13/site-packages/pytermgui/window_manager/manager.py", line 121, in __exit__
    raise exception
  File "/Users/conorcleary/projects/gemini_projects/mlb-cli-py/app/mlb_cli.py", line 324, in run
    self.manager.run()
    ~~~~~~~~~~~~~~~~^^
  File "/opt/anaconda3/lib/python3.13/site-packages/pytermgui/window_manager/manager.py", line 198, in run
    self._run_input_loop()
    ~~~~~~~~~~~~~~~~~~~~^^
  File "/opt/anaconda3/lib/python3.13/site-packages/pytermgui/window_manager/manager.py", line 144, in _run_input_loop
    self.process_mouse(key)
    ~~~~~~~~~~~~~~~~~~^^^^^
  File "/opt/anaconda3/lib/python3.13/site-packages/pytermgui/window_manager/manager.py", line 497, in process_mouse
    self.focus(window)
    ~~~~~~~~~~^^^^^^^^
  File "/opt/anaconda3/lib/python3.13/site-packages/pytermgui/window_manager/manager.py", line 296, in focus
    self.focused.blur()
    ^^^^^^^^^^^^^^^^^
AttributeError: 'CalendarButton' object has no attribute 'blur'