fix saving draft with shared user, display user shared to/from in expanded leg card

lib/components/pages/traction/traction.dart

@@ -7,6 +7,7 @@ import 'package:mileograph_flutter/components/traction/traction_card.dart';
 import 'package:mileograph_flutter/objects/objects.dart';
 import 'package:mileograph_flutter/services/data_service.dart';
 import 'package:mileograph_flutter/services/distance_unit_service.dart';
+import 'package:mileograph_flutter/services/authservice.dart';
 import 'package:provider/provider.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 

lib/components/pages/traction/traction_page.dart

@@ -569,6 +569,7 @@ class _TractionPageState extends State<TractionPage> {
   }
 
   Widget _buildHeaderActions(BuildContext context, bool isMobile) {
+    final isElevated = context.read<AuthService>().isElevated;
     final refreshButton = IconButton(
       tooltip: 'Refresh',
       onPressed: _refreshTraction,
@@ -587,32 +588,34 @@ class _TractionPageState extends State<TractionPage> {
             ),
           );
 
-    final newTractionButton = FilledButton.icon(
-      onPressed: () async {
-        final createdClass = await context.push<String>(
-          '/traction/new',
-        );
-        if (!mounted) return;
-        if (createdClass != null && createdClass.isNotEmpty) {
-          _classController.text = createdClass;
-          _selectedClass = createdClass;
-          _refreshTraction();
-        } else if (createdClass == '') {
-          _refreshTraction();
-        }
-      },
-      icon: const Icon(Icons.add),
-      label: const Text('New Traction'),
-    );
+    final newTractionButton = !isElevated
+        ? null
+        : FilledButton.icon(
+            onPressed: () async {
+              final createdClass = await context.push<String>(
+                '/traction/new',
+              );
+              if (!mounted) return;
+              if (createdClass != null && createdClass.isNotEmpty) {
+                _classController.text = createdClass;
+                _selectedClass = createdClass;
+                _refreshTraction();
+              } else if (createdClass == '') {
+                _refreshTraction();
+              }
+            },
+            icon: const Icon(Icons.add),
+            label: const Text('New Traction'),
+          );
 
     final desktopActions = [
       refreshButton,
       if (classStatsButton != null) classStatsButton,
-      newTractionButton,
+      if (newTractionButton != null) newTractionButton,
     ];
 
     final mobileActions = [
-      newTractionButton,
+      if (newTractionButton != null) newTractionButton,
       if (classStatsButton != null) classStatsButton,
       refreshButton,
     ];