Updates to X3-specific display and power button handling

Centralize display initialization and power button verification for X3 devices

lib/hal/HalDisplay.cpp

@@ -7,7 +7,22 @@ HalDisplay::HalDisplay() : einkDisplay(EPD_SCLK, EPD_MOSI, EPD_CS, EPD_DC, EPD_R
 
 HalDisplay::~HalDisplay() {}
 
-void HalDisplay::begin() { einkDisplay.begin(); }
+void HalDisplay::begin() {
+  // Set X3-specific display dimensions before initializing
+  if (gpio.deviceIsX3()) {
+    einkDisplay.setDisplayDimensions(792, 528);
+  }
+
+  einkDisplay.begin();
+
+  // Request resync after specific wakeup events to ensure clean display state
+  const auto wakeupReason = gpio.getWakeupReason();
+  if (wakeupReason == HalGPIO::WakeupReason::PowerButton ||
+      wakeupReason == HalGPIO::WakeupReason::AfterFlash ||
+      wakeupReason == HalGPIO::WakeupReason::Other) {
+    einkDisplay.requestResync();
+  }
+}
 
 void HalDisplay::setDisplayDimensions(uint16_t width, uint16_t height) {
   einkDisplay.setDisplayDimensions(width, height);