新增全量拉取功能，允许用户从远程同步所有物料数据，优化用户体验。更新前端视图以支持新命令，并添加同步状态管理，确保操作的安全性和反馈。

yy-admin-master/YY.Admin/ViewModels/MixerMaterial/MixerMaterialListViewModel.cs

@@ -84,9 +84,13 @@ public class MixerMaterialListViewModel : BaseViewModel
 
     public string ToggleExpandButtonText => _isTreeAllExpanded ? "折叠全部" : "展开全部";
 
+    private bool _isSyncing;
+    public bool IsSyncing { get => _isSyncing; set => SetProperty(ref _isSyncing, value); }
+
     public DelegateCommand SearchCommand { get; }
     public DelegateCommand ResetCommand { get; }
     public DelegateCommand AddCommand { get; }
+    public DelegateCommand PullAllCommand { get; }
     public DelegateCommand<MesMixerMaterial> EditCommand { get; }
     public DelegateCommand<MesMixerMaterial> DeleteCommand { get; }
     public DelegateCommand PrevPageCommand { get; }
@@ -120,6 +124,25 @@ public class MixerMaterialListViewModel : BaseViewModel
         PrevPageCommand = new DelegateCommand(async () => { if (PageNo > 1) { PageNo--; await LoadAsync(); } });
         NextPageCommand = new DelegateCommand(async () => { if ((long)PageNo * PageSize < Total) { PageNo++; await LoadAsync(); } });
         ToggleExpandCommand = new DelegateCommand(ToggleExpand);
+        PullAllCommand = new DelegateCommand(async () =>
+        {
+            if (IsSyncing) return;
+            IsSyncing = true;
+            try
+            {
+                await _mixerMaterialService.SyncFromRemoteAsync();
+                await LoadAsync();
+                Growl.Success("全量拉取完成！");
+            }
+            catch (Exception ex)
+            {
+                Growl.Error($"全量拉取失败：{ex.Message}");
+            }
+            finally
+            {
+                IsSyncing = false;
+            }
+        });
 
         _materialChangedToken = _eventAggregator
             .GetEvent<MixerMaterialChangedEvent>()