Update the battery status when plugging/unplugging

src/battery/battery.cpp

@@ -73,7 +73,10 @@ auto Battery::Update() -> void {
   } else {
     is_charging = *charge_state == ChargeStatus::kChargingRegular ||
                   *charge_state == ChargeStatus::kChargingFast ||
-                  *charge_state == ChargeStatus::kFullCharge;
+                  *charge_state == ChargeStatus::kFullCharge ||
+                  // Treat 'no battery' as charging because, for UI purposes,
+                  // we're *kind of* at full charge if u think about it.
+                  *charge_state == ChargeStatus::kNoBattery;
   }
 
   if (state_ && state_->is_charging == is_charging &&

src/system_fsm/include/system_events.hpp

@@ -57,7 +57,6 @@ struct SamdUsbMscChanged : tinyfsm::Event {
   bool en;
 };
 
-struct ChargingStatusChanged : tinyfsm::Event {};
 struct BatteryStateChanged : tinyfsm::Event {
   battery::Battery::BatteryState new_state;
 };

src/system_fsm/system_fsm.cpp

@@ -84,10 +84,8 @@ void SystemState::react(const internal::SamdInterrupt&) {
   auto charge_status = samd.GetChargeStatus();
   auto usb_status = samd.GetUsbStatus();
 
-  if (charge_status != prev_charge_status) {
+  if (charge_status != prev_charge_status && sServices) {
-    ChargingStatusChanged ev{};
+    sServices->battery().Update();
-    events::System().Dispatch(ev);
-    events::Ui().Dispatch(ev);
   }
   if (usb_status != prev_usb_status) {
     ESP_LOGI(kTag, "usb status changed");