Add CommonWarningDialogUI and RegistryUtil to Support NVIDIA Driver Warning

UI/FFmpegDownloadUI.cs

@@ -32,12 +32,12 @@ namespace ADOFAIRenderer.UI
         private System.Threading.CancellationTokenSource? _cts;
         private readonly System.Collections.Concurrent.ConcurrentQueue<Action> _mainThreadQueue = new();
 
-        private static bool CheckFFmpegExists()
+        public static bool CheckFFmpegExists()
         {
             var userLibs = MelonEnvironment.UserLibsDirectory;
             if (!Directory.Exists(userLibs)) return false;
 
-            string searchPattern = Application.platform switch
+            var searchPattern = Application.platform switch
             {
                 RuntimePlatform.WindowsPlayer => "avcodec-*.dll",
                 RuntimePlatform.OSXPlayer => "libavcodec.*.dylib",
@@ -58,8 +58,11 @@ namespace ADOFAIRenderer.UI
             obj.AddComponent<FFmpegDownloadUI>();
         }
 
+        public static FFmpegDownloadUI? Instance { get; private set; }
+
         private void Awake()
         {
+            Instance = this;
             if (CheckFFmpegExists())
             {
                 Destroy(gameObject);
@@ -647,6 +650,10 @@ namespace ADOFAIRenderer.UI
         private void OnDestroy()
         {
             _cts?.Dispose();
+            if (Instance == this)
+            {
+                Instance = null;
+            }
         }
     }
 }