完善客户端功能并同步差距文档

project/ui/friend_ui.gd

@@ -32,6 +32,8 @@ func is_open() -> bool:
 func close() -> void:
 	if _root:
 		_root.visible = false
+	if _invite_dialog:
+		_invite_dialog.hide()
 
 func toggle() -> void:
 	_root.visible = not _root.visible
@@ -94,6 +96,8 @@ func _on_friend_invite(name: String) -> void:
 func _answer_invite(accept: bool) -> void:
 	var name := _pending_invite
 	_pending_invite = ""
+	if _invite_dialog:
+		_invite_dialog.hide()
 	if name != "" and client != null and client.has_method("friend_answer"):
 		client.friend_answer(name, accept)