feat(modules): call user on-update if configured

src/modules/battery.cpp

@@ -149,6 +149,11 @@ const std::string waybar::modules::Battery::formatTimeRemaining(float hoursRemai
 }
 
 auto waybar::modules::Battery::update() -> void {
+  // Run user-provided update handler if configured
+  if (config_["on-update"].isString()) {
+    AModule::update();
+  }
+
   auto [capacity, time_remaining, status] = getInfos();
   if (status == "Unknown") {
     status = getAdapterStatus(capacity);