Support demo users

tests/ui/settings_ui_test.py

@@ -5,7 +5,7 @@ def test_change_theme(app):
     app.run()
     app.switch_page("pages/settings.py").run()
 
-    assert app.session_state.current_theme =="light", "Light theme should be default"
+    assert app.session_state.current_theme == "light", "Light theme should be default"
 
     assert app.button[0].label == "Light"
     assert app.button[0].disabled == True, "Light theme should be selected"
@@ -16,6 +16,8 @@ def test_change_theme(app):
     app.button[1].click().run()
 
     assert "dark" == crud.get_theme()
+    assert app.button[0].disabled == False, "Light theme should be de-selected"
+    assert app.button[1].disabled == True, "Dark theme should be selected"
 
 def test_change_color_palette(app):
     app.run()