fix ip none issue

wifi.py

@@ -144,6 +144,13 @@ class WiFiManager:
             wifi = network.wifi.Wifi()
             if wifi.is_connected():
                 self._wifi_connected = True
+                # MaixPy 的 is_connected 可能不会同步填充 IP，这里用系统命令补齐一次
+                try:
+                    ip = os.popen("ifconfig wlan0 2>/dev/null | grep 'inet ' | awk '{print $2}'").read().strip()
+                    if ip:
+                        self._wifi_ip = ip
+                except Exception:
+                    pass
                 return True
         except:
             self.logger.warning("Failed to check WiFi connection using MaixPy network", exc_info=True)