fix: single boot refresh with QR code, async WiFi scan, skip light sleep in AP mode

Co-authored-by: Cursor <cursoragent@cursor.com>

src/main.cpp

@@ -199,19 +199,19 @@ void setup() {
     webServer.begin(settingsManager, immichClient, powerManager, wifiManager);
     webServer.setActionCallback(webActionCallback);
 
+    // Single display update after all init is complete
     if (wifiManager.isAPMode()) {
-        displayManager.showMessage("Setup Required",
-            "Connect to PaperColor-Setup WiFi");
+        displayManager.showSetupScreen();
     } else {
         displayManager.showMessage("Immich Frame", "Loading photos...");
 
         // Create display task on Core 1
         xTaskCreatePinnedToCore(displayTask, "display", 32768, nullptr, 1,
                                 &displayTaskHandle, 1);
-    }
 
-    // Enable light sleep for power saving
-    powerManager.enableLightSleep();
+        // Enable light sleep only in station mode (not supported in AP mode)
+        powerManager.enableLightSleep();
+    }
 
     Serial.println("[main] Boot complete");
 }