fix DbCurrent

src/Snap.Hutao/Snap.Hutao/Core/Database/DbCurrent.cs

@@ -42,7 +42,7 @@ internal sealed class DbCurrent<TEntity, TMessage>
         set
         {
             // prevent useless sets
-            if (current == value)
+            if (current?.InnerId == value?.InnerId)
             {
                 return;
             }

src/Snap.Hutao/Snap.Hutao/Core/Database/ISelectable.cs

@@ -12,6 +12,11 @@ namespace Snap.Hutao.Core.Database;
 [HighQuality]
 internal interface ISelectable
 {
+    /// <summary>
+    /// 数据库内部Id
+    /// </summary>
+    Guid InnerId { get; }
+
     /// <summary>
     /// 获取或设置当前项的选中状态
     /// </summary>