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

Common/ServiceExtension.cs

@@ -3,6 +3,18 @@ using Microsoft.Extensions.DependencyInjection;
 
 namespace Common;
 
+public static class TypeExtensions
+{
+    /// <summary>
+    /// 深度复制对象属性到目标对象
+    /// </summary>
+    public static T? DeepClone<T>(this T source)
+    {
+        var json = System.Text.Json.JsonSerializer.Serialize(source);
+        return System.Text.Json.JsonSerializer.Deserialize<T>(json);
+    }
+}
+
 /// <summary>
 /// 服务依赖注入扩展
 /// </summary>

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)
         {

Service/GlobalUsings.cs

@@ -12,4 +12,5 @@ global using System.Linq;
 global using Service.AppSettingModel;
 global using System.Text.Json.Serialization;
 global using System.Text.Json.Nodes;
-global using Microsoft.Extensions.Configuration;
+global using Microsoft.Extensions.Configuration;
+global using Common;

Web/src/views/PeriodicRecord.vue

@@ -36,6 +36,7 @@
                 </template>
               </van-cell>
               <van-cell title="分类" :value="item.classify || '未分类'" />
+              <van-cell title="下次执行时间" :value="formatDateTime(item.nextExecuteTime) || '未设置'" />
               <van-cell title="状态">
                 <template #value>
                   <van-switch 
@@ -246,6 +247,7 @@ import {
 } from '@/api/transactionPeriodic'
 import PopupContainer from '@/components/PopupContainer.vue'
 import ClassifySelector from '@/components/ClassifySelector.vue'
+import dayjs from 'dayjs'
 
 const router = useRouter()
 const navTitle = ref('周期账单')
@@ -507,6 +509,12 @@ const toggleEnabled = async (id, enabled) => {
   }
 }
 
+const formatDateTime = (date) => {
+  if (!date) return ''
+
+  return dayjs(date).format('YYYY-MM-DD HH:mm:ss')
+}
+
 // 重置表单
 const resetForm = () => {
   form.id = null