Merge branch 'feature-nxdev' of https://gitea.nxsir.cn/code/IM into feature-nxdev

backend/IM_API/Application/EventHandlers/FriendAddHandler/FriendAddSignalRHandler.cs

@@ -22,7 +22,7 @@ namespace IM_API.Application.EventHandlers.FriendAddHandler
             var usersList = new List<string> { 
                 @event.RequestUserId.ToString(), @event.ResponseUserId.ToString()
             };
-            var res = new HubResponse<MessageBaseDto>("Event", new MessageBaseDto()
+            var res = new HubResponse<MessageBaseDto>(HubResponseType.FriendAccepted, new MessageBaseDto()
             {
                 ChatType = ChatType.PRIVATE,
                 Content = "您有新的好友关系已添加",

backend/IM_API/Dtos/HubResponse.cs

@@ -39,11 +39,44 @@ namespace IM_API.Dtos
             Message = codeDefine.Message;
             Data = data;
         }
+        public HubResponse(HubResponseType type, T? data)
+        {
+            Code = CodeDefine.SUCCESS.Code;
+            Method = "Event";
+            Type = type;
+            Data = data;
+        }
     }
     public enum HubResponseType
     {
-        ChatMsg = 1,      // 聊天内容
-        SystemNotice = 2, // 系统通知（如：申请好友成功）
-        ActionStatus = 3  // 状态变更（如：对方正在输入、已读回执）
+        // --- 基础聊天 (10-19) ---
+        ChatMsg = 1,              // 普通消息
+
+        // --- 系统与通知 (20-29) ---
+        SystemNotice = 2,         // 通用系统通知
+        FriendRequest = 21,       // 好友申请消息
+        FriendAccepted = 22,      // 好友通过通知
+        UserInLine = 23,          // 好友上线/下线通知
+
+        // --- 状态变更与交互 (30-39) ---
+        ActionStatus = 3,         // 通用状态（正在输入等）
+        MsgReadReceipt = 31,      // 已读回执
+        MsgRevoke = 32,           // 消息撤回
+        MsgEdit = 33,             // 消息二次编辑更新
+
+        // --- 群组管理 (40-49) ---
+        GroupInvited = 41,        // 被邀请入群
+        GroupMemberUpdate = 42,   // 群成员变动（进群/退群）
+        GroupAnnouncement = 43,   // 群公告更新
+        GroupDismissed = 44,      // 群组解散
+
+        // --- 实时通信控制 (50-59) ---
+        RTC_CallRequest = 51,     // 音视频通话邀请
+        RTC_CallHandled = 52,     // 音视频接听/挂断/取消状态
+
+        // --- 异常与安全 (90-99) ---
+        ErrorInternal = 91,       // 服务器内部错误
+        TokenExpired = 92,        // 登录过期，强制下线
+        KickedOut = 93            // 被挤下线（异地登录）
     }
 }

backend/IM_API/Services/ConversationService.cs

@@ -146,7 +146,8 @@ namespace IM_API.Services
 
         public async Task MakeConversationAsync(int userAId, int userBId, ChatType chatType)
         {
-            var userAcExist = await _context.Conversations.AnyAsync(x => x.UserId == userAId && x.TargetId == userBId);
+            var userAcExist = await _context.Conversations.AnyAsync(
+                x => x.UserId == userAId && x.TargetId == userBId && x.ChatType == chatType);
             if (userAcExist) return;
             var streamKey = chatType == ChatType.PRIVATE ? 
                 StreamKeyBuilder.Private(userAId, userBId) : StreamKeyBuilder.Group(userBId);