wifi udp stream activity indicator added

app/lib/ui/screens/settings/settings_screen.dart

@@ -143,6 +143,7 @@ class _WifiPanelState extends ConsumerState<_WifiPanel> {
   Widget build(BuildContext context) {
     final linkState = ref.watch(wifiLinkStateProvider).value;
     final errorReason = ref.watch(wifiLinkErrorReasonProvider);
+    final isReceiving = ref.watch(wifiStreamActivityProvider);
     final connectionSettings = ref.watch(connectionSettingsProvider).value;
     final log = ref.watch(wifiConnectionLogProvider);
     final packetCount = ref.watch(wifiConnectionLogProvider.notifier).packetCount;
@@ -163,6 +164,8 @@ class _WifiPanelState extends ConsumerState<_WifiPanel> {
           children: [
             Text('WiFi (UDP)', style: Theme.of(context).textTheme.titleSmall),
             const Spacer(),
+            _StreamActivityPill(isReceiving: isReceiving),
+            const SizedBox(width: 6),
             _StatePill(state: linkState),
           ],
         ),
@@ -459,6 +462,32 @@ class _BluetoothPanel extends ConsumerWidget {
   }
 }
 
+/// Zeigt neben [_StatePill], ob gerade UDP-Pakete ankommen ("receiving") -
+/// unabhaengig vom Verbindungszustand, der Socket kann offen sein, ohne
+/// dass die Gegenstelle sendet (siehe wifiStreamActivityProvider).
+class _StreamActivityPill extends StatelessWidget {
+  const _StreamActivityPill({required this.isReceiving});
+
+  final bool isReceiving;
+
+  @override
+  Widget build(BuildContext context) {
+    final color = isReceiving ? DmcColors.liveGreen : Colors.grey;
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 4),
+      decoration: BoxDecoration(
+        color: color.withValues(alpha: 0.15),
+        borderRadius: BorderRadius.circular(12),
+        border: Border.all(color: color),
+      ),
+      child: Text(
+        isReceiving ? 'Receiving' : 'Not receiving',
+        style: TextStyle(color: color, fontSize: 12),
+      ),
+    );
+  }
+}
+
 class _StatePill extends StatelessWidget {
   const _StatePill({required this.state});