feat: 添加深度复制功能，优化自动分类逻辑；更新周期账单视图以显示下次执行时间

Service/EmailServices/EmailHandleService.cs

@@ -175,7 +175,14 @@ public class EmailHandleService(
 
     private async Task AutoClassifyAsync(TransactionRecord[] records)
     {
-        await AnalyzeClassifyAsync(records.ToArray());
+        var clone = records.ToArray().DeepClone();
+
+        if(clone?.Any() != true)
+        {
+            return;
+        }
+
+        await AnalyzeClassifyAsync(clone);
 
         foreach (var record in records)
         {