增强原材料入场记录视图模型，新增 SuspendEmbeddedPrintPreviewAirspace 属性以处理 WebView2 的嵌入式打印预览遮挡问题。重构相关对话框调用逻辑，确保在弹窗期间正确管理预览状态。同时，优化原材料卡片生成确认窗口的预览逻辑，提升用户体验和界面响应性。

yy-admin-master/YY.Admin/ViewModels/RawMaterialEntry/RawMaterialEntryOperationViewModel.cs

@@ -170,9 +170,18 @@ public class RawMaterialEntryOperationViewModel : RawMaterialEntryEditDialogView
         {
             if (!SetProperty(ref _isPrintPreviewExpanded, value)) return;
             if (value) _lastPreviewSnapshot = string.Empty;
+            RaisePropertyChanged(nameof(IsPrintPreviewWebAreaVisible));
         }
     }
 
+    /// <summary>右侧下方预览区是否显示 WebView2 宿主（HandyControl 内嵌弹窗期间因 Airspace 临时隐藏）。</summary>
+    public bool IsPrintPreviewWebAreaVisible => !SuspendEmbeddedPrintPreviewAirspace && IsPrintPreviewExpanded;
+
+    protected override void OnSuspendEmbeddedPrintPreviewAirspaceChanged()
+    {
+        RaisePropertyChanged(nameof(IsPrintPreviewWebAreaVisible));
+    }
+
     private string _printPreviewStatus = string.Empty;
     /// <summary>预览区状态提示（如离线、加载中、错误摘要）。</summary>
     public string PrintPreviewStatus
@@ -744,7 +753,9 @@ public class RawMaterialEntryOperationViewModel : RawMaterialEntryEditDialogView
             Owner = Application.Current.MainWindow,
             WindowStartupLocation = WindowStartupLocation.CenterOwner
         };
-        var confirmed = confirmWindow.ShowDialog() == true;
+        // WebView2 Airspace：模态子窗体仍可能与本窗体内 HWND 叠层异常，弹窗期间收起嵌入预览
+        var confirmed = await SuspendEmbeddedPrintPreviewAirspaceWhileAsync(() =>
+            Task.FromResult(confirmWindow.ShowDialog() == true));
         if (!confirmed) return;
         var selectedPrinterName = confirmWindow.SelectedPrinterName;
         if (string.IsNullOrWhiteSpace(selectedPrinterName))