feat(firmware): add 'user data' section to model yaml for Lua scripts (#7562)

Co-authored-by: Peter Feerick <peter.feerick@gmail.com>
Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>

radio/src/model_init.cpp

@@ -152,6 +152,7 @@ void applyDefaultTemplate()
   LayoutFactory::deleteCustomScreens();
   LayoutFactory::deleteTopBarWidgets();
 #endif
+  g_model.clearUserData();
 
   // enable switch warnings
   bool sw1found = false;