feat : 파티 정보 업데이트 기능 추가

MMOTestServer/MMOserver/Game/GameServer.cs

@@ -584,6 +584,28 @@ public class GameServer : ServerBase
                 BroadcastToUsers(party.PartyMemberIds, data); // 전원 (리더 포함)
                 break;
             }
+            case PartyUpdateType.UPDATE:
+            {
+                if (!pm.UpdateParty(hashKey, req.PartyId, out PartyInfo? party))
+                {
+                    SendError(peer, ErrorCode.PARTY_UPDATE_FAILED);
+                    return;
+                }
+
+                UpdatePartyPacket notify = new UpdatePartyPacket
+                {
+                    PartyId = req.PartyId,
+                    Type = PartyUpdateType.LEAVE,
+                    LeaderId = party?.LeaderId ?? 0,
+                    PlayerId = hashKey,
+                };
+                byte[] data = PacketSerializer.Serialize<UpdatePartyPacket>((ushort)PacketCode.UPDATE_PARTY, notify);
+                if (party != null)
+                {
+                    BroadcastToUsers(party.PartyMemberIds, data); // 남은 멤버들에게
+                }
+                break;
+            }
         }
     }