fix(api): let authors and owners delete unfinished uploads

server/src/WebDrop.Core/ChannelService.cs

@@ -515,7 +515,9 @@ public sealed partial class ChannelService(
 
             var crypto = tx.GetWorkspaceCrypto(id);
             var obj = crypto.Objects.Find(o => o.ItemId == itemId.ToBase64Url());
-            if (creds.RequireSignedContent && obj is not null)
+            // 没传完的上传(末帧从未入库)没有已验签的清单,也就不可能有删除事件:作者或空间主可以直接清理,否则它会永久占着空间配额
+            bool unfinished = obj is not null && obj.Event is null;
+            if (creds.RequireSignedContent && obj is not null && !unfinished)
             {
                 if (signedEvent is null || obj?.Event is null || signedEvent.Username != principal.AccountName
                     || signedEvent.DeviceId != creds.AccountDeviceId || signedEvent.ChannelId != obj.ChannelId