clean up code

CursorLang.Agent/Interop/TrayIconNative.cs

@@ -29,7 +29,6 @@ internal static class TrayIconNative
     internal const int ContextMenuNotification = 0x007B;
 
     private const int NIM_ADD = 0x00000000;
-    private const int NIM_MODIFY = 0x00000001;
     private const int NIM_DELETE = 0x00000002;
     private const int NIM_SETVERSION = 0x00000004;
 
@@ -72,13 +71,6 @@ internal static class TrayIconNative
         return true;
     }
 
-    /// <summary>Replaces the image and the tooltip of an icon already there.</summary>
-    internal static bool Modify(IntPtr window, int id, IntPtr icon, string tooltip)
-    {
-        NotifyIconData data = Describe(window, id, icon, tooltip);
-        return Shell_NotifyIcon(NIM_MODIFY, ref data);
-    }
-
     /// <summary>Takes the icon away. A forgotten icon stays in the tray until hovered.</summary>
     internal static void Remove(IntPtr window, int id)
     {

CursorLang.Agent/Interop/WindowNative.cs

@@ -103,6 +103,11 @@ internal static class WindowNative
     private const byte AC_SRC_ALPHA = 1;
     private const uint ULW_ALPHA = 0x00000002;
 
+    /// <summary>
+    /// BLENDFUNCTION. <c>BlendFlags</c> is never assigned and must stay all the same:
+    /// Windows reads the structure by its layout, and dropping a byte from the middle
+    /// of it would shift everything after.
+    /// </summary>
     [StructLayout(LayoutKind.Sequential)]
     private struct BlendFunction
     {

CursorLang.Agent/Windows/NativeTrayIcon.cs

@@ -49,9 +49,6 @@ internal sealed class NativeTrayIcon : IDisposable
 
     internal event EventHandler? ExitRequested;
 
-    /// <summary>Whether the shell accepted the icon. Reported by the diagnostics.</summary>
-    internal bool IsInstalled => _isInstalled;
-
     internal bool Install()
     {
         if (_isInstalled)