Merge upstream and add generic Codex notifications

Notify/Interop/ProcessTree.cs

@@ -63,6 +63,24 @@ internal static partial class ProcessTree
         return "";
     }
 
+    public static string FindWindowExePath(IntPtr hwnd)
+    {
+        if (hwnd == IntPtr.Zero)
+        {
+            return "";
+        }
+
+        try
+        {
+            GetWindowThreadProcessId(hwnd, out var pid);
+            return pid == 0 ? "" : GetFullPath(pid);
+        }
+        catch
+        {
+            return "";
+        }
+    }
+
     private static Dictionary<uint, (uint Parent, string Name)> BuildParentMap()
     {
         var map = new Dictionary<uint, (uint, string)>();
@@ -128,6 +146,9 @@ internal static partial class ProcessTree
     [LibraryImport("kernel32.dll")]
     private static partial uint GetCurrentProcessId();
 
+    [LibraryImport("user32.dll")]
+    private static partial uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);
+
     [LibraryImport("kernel32.dll")]
     private static partial IntPtr CreateToolhelp32Snapshot(uint dwFlags, uint th32ProcessID);