增加steam

Assets/TcgEngine/Scripts/Menu/MainMenu.cs

@@ -274,6 +274,22 @@ namespace TcgEngine.UI
         {
             SettingsPanel.Get().Show();
         }
+        
+        public void OnClickRecharge()
+        {
+#if STEAMWORKS_ENABLED
+        if (SteamCurrencyManager.instance != null && SteamCurrencyManager.instance.IsInitialized())
+        {
+            SteamCurrencyManager.instance.PurchaseGoldPackage(100, 99);
+        }
+        else
+        {
+            Debug.LogError("Steam currency system not initialized");
+        }
+#else
+            Debug.LogWarning("Steamworks not enabled");
+#endif
+        }
 
         public void FadeToScene(string scene)
         {