Fix TapADN ad lifecycle callbacks

Tapadn_Adapter/Runtime/Scripts/TapadnSplashPlayer.cs

@@ -7,6 +7,7 @@ public sealed class TapadnSplashPlayer : ADPlayer, IDirichletSplashAutoAdListene
 {
     private DirichletAdNative _adNative;
     private DirichletSplashAd _loadedAd;
+    private bool _showSettled;
 
     public override int MaxLoadAttempts => TapadnAdController.CurrentOptions?.SplashMaxLoadAttempts ?? base.MaxLoadAttempts;
     public override float LoadRetryDelaySeconds => Math.Max(0f, (TapadnAdController.CurrentOptions?.SplashLoadRetryDelayMs ?? 500) / 1000f);
@@ -63,6 +64,7 @@ public sealed class TapadnSplashPlayer : ADPlayer, IDirichletSplashAutoAdListene
                 _loadedAd = ad;
                 _loadedAd.Shown += OnManualShown;
                 _loadedAd.Clicked += OnManualClicked;
+                _loadedAd.ShowFailed += OnManualShowFailed;
                 _loadedAd.Closed += OnManualClosed;
                 curState = 2;
                 Debug.Log($"[TapADN] Splash loaded. slot={Key}");
@@ -78,6 +80,7 @@ public sealed class TapadnSplashPlayer : ADPlayer, IDirichletSplashAutoAdListene
     {
         adListener.onClose = onClose;
         adListener.onVideoComplete = onVideoComplete;
+        _showSettled = false;
         curState = 0;
 
         if (UseAutoLoad())
@@ -88,12 +91,18 @@ public sealed class TapadnSplashPlayer : ADPlayer, IDirichletSplashAutoAdListene
 
         if (_loadedAd == null || !_loadedAd.Show())
         {
-            adListener.OnShowError();
+            OnError(new DirichletError("show_failed", "ShowSplashAd returned false"));
         }
     }
 
     public void OnError(DirichletError error)
     {
+        if (_showSettled)
+        {
+            return;
+        }
+
+        _showSettled = true;
         curState = 0;
         Debug.LogError($"[TapADN] Splash show failed. code={error?.Code}, message={error?.Message}");
         adListener.OnShowError();
@@ -106,6 +115,12 @@ public sealed class TapadnSplashPlayer : ADPlayer, IDirichletSplashAutoAdListene
 
     public void OnAdClose()
     {
+        if (_showSettled)
+        {
+            return;
+        }
+
+        _showSettled = true;
         adListener.OnAdClose();
         adListener.OnShowComplete();
     }
@@ -128,6 +143,11 @@ public sealed class TapadnSplashPlayer : ADPlayer, IDirichletSplashAutoAdListene
     {
     }
 
+    private void OnManualShowFailed(DirichletError error)
+    {
+        OnError(error);
+    }
+
     private void OnManualClosed()
     {
         _loadedAd?.Destroy();