add(conversation):完善私聊好友会话服务

backend/IM_API/Models/ImDbContext.cs

@@ -110,24 +110,22 @@ public partial class ImDbContext : DbContext
 
             entity.HasIndex(e => e.UserId, "Userid");
 
-            entity.HasIndex(e => e.LastMessageId, "lastMessageId");
+            entity.HasIndex(e => e.LastReadMessageId, "lastReadMessageId");
 
             entity.Property(e => e.Id)
                 .HasColumnType("int(11)")
                 .HasColumnName("ID");
             entity.Property(e => e.ChatType).HasColumnType("int(11)");
-            entity.Property(e => e.LastMessageId)
-                .HasComment("最后一条消息ID	")
+            entity.Property(e => e.LastReadMessageId)
+                .HasComment("最后一条已读消息ID	")
                 .HasColumnType("int(11)")
                 .HasColumnName("lastMessageId");
-            entity.Property(e => e.MsgType)
-                .HasComment("消息类型（同Messages.MsgType）	")
-                .HasColumnType("int(11)");
-            entity.Property(e => e.TargetAvatar).HasMaxLength(255);
+            entity.Property(e => e.StreamKey)
+                .HasMaxLength(255)
+                .HasComment("消息推送唯一标识符");
             entity.Property(e => e.TargetId)
                 .HasComment("对方ID（群聊为群聊ID，单聊为单聊ID）	")
                 .HasColumnType("int(11)");
-            entity.Property(e => e.TargetName).HasMaxLength(255);
             entity.Property(e => e.UnreadCount)
                 .HasComment("未读消息数	")
                 .HasColumnType("int(11)");
@@ -135,11 +133,6 @@ public partial class ImDbContext : DbContext
                 .HasComment("用户")
                 .HasColumnType("int(11)");
 
-            entity.HasOne(d => d.LastMessage).WithMany(p => p.Conversations)
-                .HasForeignKey(d => d.LastMessageId)
-                .OnDelete(DeleteBehavior.ClientSetNull)
-                .HasConstraintName("conversations_ibfk_2");
-
             entity.HasOne(d => d.User).WithMany(p => p.Conversations)
                 .HasForeignKey(d => d.UserId)
                 .OnDelete(DeleteBehavior.ClientSetNull)
@@ -553,6 +546,9 @@ public partial class ImDbContext : DbContext
             entity.Property(e => e.State)
                 .HasComment("消息状态(0:已发送,1:已撤回)	")
                 .HasColumnType("tinyint(4)");
+            entity.Property(e => e.StreamKey)
+                .HasMaxLength(255)
+                .HasComment("消息推送唯一标识符");
 
             entity.HasOne(d => d.SenderNavigation).WithMany(p => p.Messages)
                 .HasForeignKey(d => d.Sender)