Add PROTOCOL_ADDFRIEND and enable add friend request

Assets/PerfectWorld/Scripts/Network/UnityGameSession.cs

@@ -173,7 +173,9 @@ namespace BrewMonster.Network
             
             // Subscribe to unexpected disconnects
             _gameSession.Disconnected += OnUnexpectedDisconnect;
-            
+            _gameSession.FriendRequestReceived += OnFriendRequestReceived;
+            _gameSession.AddFriendResultReceived += OnAddFriendResultReceived;
+
             _isInitialized = true;
 
             DontDestroyOnLoad(gameObject);
@@ -184,6 +186,8 @@ namespace BrewMonster.Network
             // Tell LoginScene what to show next.
             LogoutFlowState.NextLoginEntry = entryTarget;
             _gameSession.Disconnected -= OnUnexpectedDisconnect;
+            _gameSession.FriendRequestReceived -= OnFriendRequestReceived;
+            _gameSession.AddFriendResultReceived -= OnAddFriendResultReceived;
             EC_ManMessageMono.Instance.CECNPCMan.Release();
 
             if (clearSavedCreds)
@@ -619,6 +623,16 @@ namespace BrewMonster.Network
         {
             Instance._gameSession.c2s_SendCmdDuelReply(accept, idInviter);
         }
+        /// <summary>Send PROTOCOL_ADDFRIEND(202). Port of CECGameSession::friend_Add.</summary>
+        public static void Friend_Add(int idPlayer, string name)
+        {
+            Instance._gameSession.Friend_Add(idPlayer, name ?? "");
+        }
+        /// <summary>Send PROTOCOL_GETFRIENDS(206). Port of CECGameSession::friend_GetList().</summary>
+        public static void Friend_GetList()
+        {
+            Instance._gameSession.Friend_GetList();
+        }
         public static void c2s_CmdTeamKickMember(int idMember)
         {
             Instance._gameSession.c2s_SendCmdTeamKickMember(idMember);
@@ -694,6 +708,25 @@ namespace BrewMonster.Network
         /// <summary>
         /// Handles unexpected server disconnections. Shows a message box and returns to login.
         /// </summary>
+        private void OnFriendRequestReceived(int srcroleid, string askerName)
+        {
+            string name = string.IsNullOrEmpty(askerName) ? ("Player " + srcroleid) : askerName;
+            CECUIManager.Instance?.ShowMessageBox(
+                title: "Friend Request",
+                message: $"{name} wants to add you as a friend.",
+                messageBoxType: MessageBoxType.BothYesNoButton,
+                onClickedYes: () => { /* TODO: accept and call friend_AddResponse */ },
+                onClickedNo: () => { /* TODO: refuse */ });
+        }
+
+        private void OnAddFriendResultReceived(byte retcode, string message)
+        {
+            CECUIManager.Instance?.ShowMessageBox(
+                title: retcode == 0 ? "Friend added" : "Add friend failed",
+                message: message,
+                messageBoxType: MessageBoxType.YesButton);
+        }
+
         private void OnUnexpectedDisconnect()
         {
             // If this was an intentional disconnect (logout), skip UI