Improve Login and Settings

lib/views/devices_view.dart

@@ -143,6 +143,7 @@ class _DevicesViewState extends State<DevicesView> {
         const Divider(),
         ..._devices.map((device) => _DeviceRow(
               device: device,
+              baseRadioId: _devices.isNotEmpty ? _devices.first.id : null,
               onTap: () {
                 Navigator.push(
                   context,
@@ -159,22 +160,46 @@ class _DevicesViewState extends State<DevicesView> {
 
 class _DeviceRow extends StatelessWidget {
   final Device device;
+  final int? baseRadioId;
   final VoidCallback onTap;
 
   const _DeviceRow({
     required this.device,
     required this.onTap,
+    this.baseRadioId,
   });
 
+  String? get _deviceExtension {
+    if (baseRadioId == null) return null;
+    final baseStr = baseRadioId.toString();
+    final idStr = device.id.toString();
+    // Check if device ID starts with the base radio ID
+    if (idStr.startsWith(baseStr)) {
+      final extension = idStr.substring(baseStr.length);
+      return extension.isNotEmpty ? extension : '0';
+    }
+    return null;
+  }
+
   @override
   Widget build(BuildContext context) {
+    final extension = _deviceExtension;
+    final showExtension = extension != null && extension != '0';
     return ListTile(
       leading: CircleAvatar(
         backgroundColor: Theme.of(context).colorScheme.primaryContainer,
-        child: Icon(
-          Icons.settings_input_antenna,
-          color: Theme.of(context).colorScheme.onPrimaryContainer,
-        ),
+        child: showExtension
+            ? Text(
+                extension,
+                style: TextStyle(
+                  fontWeight: FontWeight.bold,
+                  color: Theme.of(context).colorScheme.onPrimaryContainer,
+                ),
+              )
+            : Icon(
+                Icons.settings_input_antenna,
+                color: Theme.of(context).colorScheme.onPrimaryContainer,
+              ),
       ),
       title: Text(device.callsign ?? 'Unknown'),
       subtitle: Column(