client can connect to provider and download an image.

Updated network component to add get mac address

components/network/network.cpp

@@ -452,3 +452,22 @@ internal void blink_last_ip_octet()
   }
 }
 #endif
+
+// === MAC Address ===
+
+esp_err_t get_mac_address(uint8_t *mac_out)
+{
+  // Prefer Ethernet if connected, fall back to WiFi
+  if (s_eth_netif != nullptr)
+  {
+    return esp_netif_get_mac(s_eth_netif, mac_out);
+  }
+
+  if (s_wifi_netif != nullptr)
+  {
+    return esp_netif_get_mac(s_wifi_netif, mac_out);
+  }
+
+  ESP_LOGE("NET", "No active network interface for MAC address");
+  return ESP_ERR_INVALID_STATE;
+}