Improve IK-style artifact scanner pipeline

native/input-helper/Program.cs

@@ -169,6 +169,23 @@ internal static class Program
                 break;
             }
 
+            case "key":
+            {
+                var info = FocusGenshinWindow();
+                if (info.Focused && !info.AlreadyForeground) Thread.Sleep(120);
+
+                var key = GetString(root, "key");
+                var sent = SendKeyPressBatch(ResolveVirtualKey(key));
+                response["key"] = key;
+                response["focused"] = info.Focused;
+                response["foregroundProcess"] = info.ForegroundProcess;
+                response["targetProcess"] = info.TargetProcess;
+                response["isElevated"] = IsElevated();
+                response["eventsSent"] = sent;
+                response["inputBlocked"] = sent < 2;
+                break;
+            }
+
             case "bounds":
             {
                 var bounds = GetGenshinClientBounds();
@@ -423,6 +440,30 @@ internal static class Program
         return Native.SendInput(1, inputs, Marshal.SizeOf<Native.INPUT>());
     }
 
+    private static uint SendKeyPressBatch(int virtualKey)
+    {
+        var inputs = new Native.INPUT[2];
+        inputs[0].type = 1; // INPUT_KEYBOARD
+        inputs[0].mi.dx = virtualKey; // same union bytes as KEYBDINPUT.wVk
+        inputs[1].type = 1;
+        inputs[1].mi.dx = virtualKey;
+        inputs[1].mi.dy = Native.KEYEVENTF_KEYUP; // same union bytes as KEYBDINPUT.dwFlags
+        return Native.SendInput(2, inputs, Marshal.SizeOf<Native.INPUT>());
+    }
+
+    private static int ResolveVirtualKey(string key)
+    {
+        return key.Trim().ToUpperInvariant() switch
+        {
+            "ESC" or "ESCAPE" => 0x1B,
+            "ENTER" => 0x0D,
+            "B" => 0x42,
+            "C" => 0x43,
+            "1" => 0x31,
+            _ => throw new ArgumentOutOfRangeException(nameof(key), $"unsupported key: {key}")
+        };
+    }
+
     private static string GetString(JsonElement root, string name)
         => root.TryGetProperty(name, out var value) ? value.ToString() : "";
 
@@ -445,6 +486,7 @@ internal static class Native
     public const uint MOUSEEVENTF_LEFTDOWN = 0x0002;
     public const uint MOUSEEVENTF_LEFTUP = 0x0004;
     public const uint MOUSEEVENTF_WHEEL = 0x0800;
+    public const int KEYEVENTF_KEYUP = 0x0002;
     public const uint SPI_GETFOREGROUNDLOCKTIMEOUT = 0x2000;
     public const uint SPI_SETFOREGROUNDLOCKTIMEOUT = 0x2001;
     public const uint SPIF_SENDCHANGE = 0x0002;