Attach an interrupt to EXT_PWR_DETECT if present, and force a screen redraw on a power change.

src/Power.cpp

@@ -691,6 +691,16 @@ bool Power::setup()
 #ifdef NRF_APM
     found = true;
 #endif
+#ifdef EXT_PWR_DETECT
+    attachInterrupt(
+        EXT_PWR_DETECT,
+        []() {
+            power->setIntervalFromNow(0);
+            runASAP = true;
+            BaseType_t higherWake = 0;
+        },
+        CHANGE);
+#endif
 
     enabled = found;
     low_voltage_counter = 0;

src/graphics/Screen.cpp

@@ -1428,6 +1428,9 @@ int Screen::handleStatusUpdate(const meshtastic::Status *arg)
         }
         nodeDB->updateGUI = false;
         break;
+    case STATUS_TYPE_POWER:
+        forceDisplay(true);
+        break;
     }
 
     return 0;