fix: remove incorrect ethernet badge on printer cards

home_flag bit 18 was incorrectly interpreted as "wired/ethernet
  connection", causing the ethernet badge to always show — even on
  printers without an ethernet port (e.g. A1, P1S). This hid the
  WiFi signal indicator entirely.

  Removed the wired_network field and ethernet badge UI. The WiFi
  signal badge now shows correctly whenever the printer reports
  signal strength.

frontend/src/components/PrinterInfoModal.tsx

@@ -1,6 +1,6 @@
 import { useState, useEffect } from 'react';
 import { useTranslation } from 'react-i18next';
-import { X, Copy, Check, Signal, Cable } from 'lucide-react';
+import { X, Copy, Check, Signal } from 'lucide-react';
 import { Card, CardContent } from './Card';
 import { formatDateOnly } from '../utils/date';
 import { getPrinterImage, getWifiStrength } from '../utils/printer';
@@ -109,18 +109,8 @@ export function PrinterInfoModal({ printer, status, totalPrintHours, onClose }:
     ),
   });
 
-  // Network connection
-  if (status?.wired_network) {
-    rows.push({
-      label: t('printers.networkLabel', 'Network'),
-      value: (
-        <span className="flex items-center gap-2">
-          <Cable className="w-4 h-4 text-bambu-green" />
-          <span className="text-bambu-green">{t('printers.connection.ethernet', 'Ethernet')}</span>
-        </span>
-      ),
-    });
-  } else if (status?.wifi_signal != null) {
+  // WiFi signal
+  if (status?.wifi_signal != null) {
     const wifi = getWifiStrength(status.wifi_signal);
     rows.push({
       label: t('printers.wifiSignalLabel'),