port(m1): wave 6a — GameMgr setters, Tab MonoBehaviour, OpeningVfx members, Vfx stubs (838->772)

- GameMgr.Is{Network,AINetwork,Watch,Replay,Puzzle,AdminWatch}Battle: read-only => settable (CS0200, Matching/NetworkBattleManagerBase assign them).
- Tab : MonoBehaviour (inherits Object.name; CS1061 x8).
- OpeningVfx: static OpenningLogStep, ShowBattleUIImmediatelyVfx (NullVfx, F1 contract), nested WaitVoiceEndVfx (CS0117/0426 x14).
- Generated no-op stubs EffectBattleVfxBase/SkillEffectBattleVfx/FallToGroundVfx/ThinkIconShowVfx (: SequentialVfxPlayer chain), baseclauses reattached.

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

SVSim.BattleEngine/Shim/Generated/ThinkIconShowVfx.g.cs

@@ -0,0 +1,14 @@
+// AUTO-GENERATED no-op stubs (m1_stub_gen) from Shadowverse_Code_2026-05-23\Wizard.Battle.View.Vfx\ThinkIconShowVfx.cs
+using System;
+using UnityEngine;
+using Wizard.Battle.Resource;
+namespace Wizard.Battle.View.Vfx
+{
+public partial class ThinkIconShowVfx
+{
+        public const string MESAGE_PREFAB_PATH = "UI/Battle/ThinkMessage";
+        public ThinkIconShowVfx(Vector3 position, IBattleResourceMgr resourceMgr) { }
+        public ThinkIconShowVfx(Func<Vector3> getPosition, IBattleResourceMgr resourceMgr) { }
+        private GameObject CreateMessageObject(IBattleResourceMgr resourceMgr) => default!;
+}
+}