fix: group messages sync failed. (#1720)

* fix: add notifications for some notifications.

* fix: modify dismissed group's status.

* fix: Adjust the logic in multiTerminalLoginChecker to prevent onlineUserNum from decreasing below zero, thereby avoiding negative values.

* fix: group messages sync failed.

pkg/common/db/controller/conversation.go

@@ -279,7 +279,7 @@ func (c *conversationDatabase) CreateGroupChatConversation(ctx context.Context,
 		for _, v := range existConversationUserIDs {
 			cache = cache.DelConversations(v, conversationID)
 		}
-		return c.cache.ExecDel(ctx)
+		return cache.ExecDel(ctx)
 	})
 }