move transfer button, hide delete button better

lib/components/traction/traction_card.dart

@@ -744,8 +744,37 @@ Future<void> showTractionDetails(
                       );
                     },
                   ),
-                  if (auth.isElevated || canDeleteAsOwner) ...[
                   const SizedBox(height: 16),
+                  FilledButton.icon(
+                    onPressed: () {
+                      Navigator.of(ctx).pop();
+                      navContext.push(
+                        Uri(
+                          path: '/traction',
+                          queryParameters: {
+                            'selection': 'single',
+                            'transferFromLocoId': loco.id.toString(),
+                          },
+                        ).toString(),
+                        extra: {
+                          'selection': 'single',
+                          'transferFromLocoId': loco.id,
+                        },
+                      );
+                    },
+                    icon: const Icon(Icons.swap_horiz),
+                    label: const Text('Transfer allocations'),
+                  ),
+                  if (auth.isElevated || canDeleteAsOwner) ...[
+                    const SizedBox(height: 8),
+                    ExpansionTile(
+                      tilePadding: EdgeInsets.zero,
+                      childrenPadding: EdgeInsets.zero,
+                      title: Text(
+                        'More',
+                        style: Theme.of(context).textTheme.titleSmall,
+                      ),
+                      children: [
                         FilledButton.tonal(
                           style: FilledButton.styleFrom(
                             backgroundColor:
@@ -764,11 +793,13 @@ Future<void> showTractionDetails(
                                   ),
                                   actions: [
                                     TextButton(
-                                  onPressed: () => Navigator.of(context).pop(false),
+                                      onPressed: () =>
+                                          Navigator.of(context).pop(false),
                                       child: const Text('Cancel'),
                                     ),
                                     FilledButton(
-                                  onPressed: () => Navigator.of(context).pop(true),
+                                      onPressed: () =>
+                                          Navigator.of(context).pop(true),
                                       style: FilledButton.styleFrom(
                                         backgroundColor:
                                             Theme.of(context).colorScheme.error,
@@ -790,12 +821,16 @@ Future<void> showTractionDetails(
                               Navigator.of(ctx).pop();
                             } catch (e) {
                               messenger.showSnackBar(
-                            SnackBar(content: Text('Failed to delete loco: $e')),
+                                SnackBar(
+                                    content: Text('Failed to delete loco: $e')),
                               );
                             }
                           },
                           child: const Text('Delete loco'),
                         ),
+                        const SizedBox(height: 8),
+                      ],
+                    ),
                   ],
                 ],
               ),

lib/services/data_service/data_service_traction.dart

@@ -472,7 +472,7 @@ extension DataServiceTraction on DataService {
   }) async {
     try {
       await api.post('/loco/alloc/transfer', {
-        'loco_id': fromLocoId,
+        'from_loco_id': fromLocoId,
         'to_loco_id': toLocoId,
       });
     } catch (e) {