Remove obsolete TODO comments and clarify code

Clean up outdated TODO comments that are no longer relevant and improve comment clarity in activity classes and parsers.

src/activities/network/WifiSelectionActivity.cpp

@@ -463,7 +463,6 @@ void WifiSelectionActivity::loop() {
       }
     }
 
-    // Handle navigation
     buttonNavigator.onNext([this] {
       selectedNetworkIndex = ButtonNavigator::nextIndex(selectedNetworkIndex, networks.size());
       requestUpdate();