port(m1): wave 6g — CS1061 member cluster (304->236)

- Friend.PlayerData full-surface generated (18 members) + hand stub -> partial.
- Wizard.RoomMatch.Player: 7 friend-info props (ViewerId/Name/Rank/Emblem/Degree/Country/IsFriend).
- GameMgr: HasAuthAdmin, ChangeAspectRatio(float), Update().
- Cute.SceneManager: ChangeScene overloads + SceneChangeParameter (+SceneChangeParameter stub).
- UnityEngine.SceneManagement.SceneManager + Scene; RedShellSDK.RedShellSDK statics.
- Packet.Attachments; Vector2.Dot/Angle/Normalize.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

SVSim.BattleEngine/Shim/GodObjects/GodObjects.cs

@@ -85,6 +85,9 @@ public class GameMgr
     public bool IsNetworkBattle { get; set; }
     public bool IsAINetwork { get; set; }
     public bool IsPuzzleQuest { get; set; }
+    public bool HasAuthAdmin { get; set; }
+    public void ChangeAspectRatio(float newAspectRatio) { }
+    public void Update() { }
 
     private EffectMgr _effect;
     private SoundMgr _sound;