port(m1): wave 6c — Unity + Steam/FB/Adjust static-class shims (696->572)

Off-battle-path static surfaces (CS0103 cluster):
- UnityStatics: Gizmos, Physics2D, Caching, GUIUtility, Cursor, ColorUtility,
  ScreenCapture, RenderSettings, JsonUtility, Social + CursorLockMode enum.
- RaycastHit2D implicit-bool operator; ILocalUser in SocialPlatforms.
- Steamworks: Callback<T>.Create, AppId_t/CSteamID/HAuthTicket/SteamNetworkingIdentity,
  MicroTxn/GetAuthSessionTicket response structs, SteamAPI/User/Utils/Client statics.
  Removed empty dup GetAuthSessionTicketResponse_t from ThirdParty.cs.
- Facebook.Unity: FB + ILoginResult + FacebookDelegate<T>; com.adjust.sdk.Adjust;
  global TimeNativePlugin/Packsize native-plugin stubs.

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

SVSim.BattleEngine/Shim/External/LooseEnds.cs

@@ -44,12 +44,52 @@ namespace MiniJSON
 
 namespace Steamworks
 {
-    // Steam callback wrapper (engine only references the type).
-    public sealed class Callback<T> { }
-    // Microtransaction auth response struct (referenced as a callback type arg).
-    public struct MicroTxnAuthorizationResponse_t { }
-    // Steam warning-message hook delegate (referenced as a type only).
+    // Steam callback wrapper. Engine constructs via Callback<T>.Create(handler).
+    public sealed class Callback<T>
+    {
+        public delegate void DispatchDelegate(T param);
+        public static Callback<T> Create(DispatchDelegate func) => new Callback<T>();
+    }
+    public enum EResult { k_EResultOK = 1 }
+    public struct AppId_t
+    {
+        public uint m_AppId;
+        public AppId_t(uint v) { m_AppId = v; }
+        public static explicit operator AppId_t(uint v) => new AppId_t(v);
+        public override string ToString() => m_AppId.ToString();
+    }
+    public struct CSteamID { public ulong m_SteamID; }
+    public struct HAuthTicket { }
+    public struct SteamNetworkingIdentity { }
+    // Microtransaction auth response struct (callback payload).
+    public struct MicroTxnAuthorizationResponse_t
+    {
+        public AppId_t m_unAppID;
+        public ulong m_ulOrderID;
+        public byte m_bAuthorized;
+    }
+    public struct GetAuthSessionTicketResponse_t
+    {
+        public HAuthTicket m_hAuthTicket;
+        public EResult m_eResult;
+    }
+    // Steam warning-message hook delegate.
     public delegate void SteamAPIWarningMessageHook_t(int severity, System.Text.StringBuilder debugText);
+
+    public static class SteamAPI
+    {
+        public static bool Init() => false;
+        public static bool RestartAppIfNecessary(AppId_t appId) => false;
+        public static void RunCallbacks() { }
+        public static void Shutdown() { }
+    }
+    public static class SteamUser
+    {
+        public static HAuthTicket GetAuthSessionTicket(byte[] pTicket, int cbMaxTicket, out uint pcbTicket, ref SteamNetworkingIdentity identity) { pcbTicket = 0; return default; }
+        public static CSteamID GetSteamID() => default;
+    }
+    public static class SteamUtils { public static AppId_t GetAppID() => default; }
+    public static class SteamClient { public static void SetWarningMessageHook(SteamAPIWarningMessageHook_t hook) { } }
 }
 
 // AOT P/Invoke callback attribute (IL2CPP) + StandaloneFileBrowser anchor.
@@ -64,7 +104,22 @@ namespace SFB { internal class _ShimAnchor { } }
 
 // ---- third-party SDK namespace anchors (referenced via `using`) ----
 namespace Facebook { internal class _ShimAnchor { } }
-namespace Facebook.Unity { internal class _ShimAnchor { } }
+namespace Facebook.Unity
+{
+    public interface ILoginResult
+    {
+        string Error { get; }
+        bool Cancelled { get; }
+        string RawResult { get; }
+    }
+    public delegate void FacebookDelegate<T>(T result);
+    public static class FB
+    {
+        public static bool IsLoggedIn => false;
+        public static void LogInWithReadPermissions(System.Collections.Generic.List<string> permissions, FacebookDelegate<ILoginResult> callback) { }
+        public static void LogOut() { }
+    }
+}
 namespace RedShellSDK { internal class _ShimAnchor { } }
 namespace ZXing { internal class _ShimAnchor { } }
 namespace ZXing.QrCode { internal class _ShimAnchor { } }

SVSim.BattleEngine/Shim/External/SdkStubs.cs

@@ -79,6 +79,17 @@ namespace PlatformSupport.Collections.ObjectModel
     internal class _ShimAnchor { }
 }
 namespace Convention { internal class _ShimAnchor { } }
-namespace com.adjust.sdk { internal class _ShimAnchor { } }
+namespace com.adjust.sdk
+{
+    public static class Adjust
+    {
+        public static bool IsEditor() => true;
+        public static void addSessionCallbackParameter(string key, string value) { }
+    }
+}
 namespace BestHTTP.Decompression { internal class _ShimAnchor { } }
 namespace BestHTTP.SocketIO.Transports { internal class _ShimAnchor { } }
+
+// Native plugins (no decomp source) referenced unqualified from global scope.
+public static class TimeNativePlugin { public static float GetDeviceOperatingTime() => 0f; }
+public static class Packsize { public static void Test() { } }

SVSim.BattleEngine/Shim/External/ThirdParty.cs

@@ -36,12 +36,6 @@ namespace UnityEngine.Networking
 
 // ---- CRI Atom/Mana audio+movie middleware: see External/CriShim.cs ----
 
-// ---- Steamworks.NET ----
-namespace Steamworks
-{
-    public struct GetAuthSessionTicketResponse_t { }
-}
-
 // ---- BestHTTP Socket.IO ----
 namespace BestHTTP.SocketIO
 {