Add `ContactMessage.senderName`

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/ContactMessage.kt

@@ -97,6 +97,8 @@ abstract class MessagePacketBase<out TSender : User, out TSubject : Contact> : P
     @WeakRefProperty
     abstract val sender: TSender
 
+    abstract val senderName: String
+
     /**
      * 消息内容
      */

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/FriendMessage.kt

@@ -48,6 +48,7 @@ class FriendMessage constructor(
     override val sender: Friend by sender.unsafeWeakRef()
     override val bot: Bot get() = sender.bot
     override val subject: Friend get() = sender
+    override val senderName: String get() = sender.nick
     override val source: OnlineMessageSource.Incoming.FromFriend get() = message.source as OnlineMessageSource.Incoming.FromFriend
 
     override fun toString(): String = "FriendMessage(sender=${sender.id}, message=$message)"

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/GroupMessage.kt

@@ -22,7 +22,7 @@ import net.mamoe.mirai.utils.unsafeWeakRef
 
 @Suppress("unused", "NOTHING_TO_INLINE")
 class GroupMessage(
-    val senderName: String,
+    override val senderName: String,
     /**
      * 发送方权限.
      */

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/TempMessage.kt

@@ -34,7 +34,7 @@ class TempMessage(
     override val bot: Bot get() = sender.bot
     override val subject: Member get() = sender
     inline val group: Group get() = sender.group
-    inline val senderName: String get() = sender.nameCardOrNick
+    override val senderName: String get() = sender.nameCardOrNick
     override val source: OnlineMessageSource.Incoming.FromTemp get() = message.source as OnlineMessageSource.Incoming.FromTemp
 
     override fun toString(): String =