Fix clipboard history support in v0.20

include/clipboard_history.hpp

@@ -0,0 +1,14 @@
+#pragma once
+#include "config.hpp"
+#include <windows.h>
+#include <vector>
+
+namespace clipboard_history {
+
+// Publishes an encoded bitmap stream through Windows.ApplicationModel.DataTransfer
+// so Windows 10/11 clipboard history can ingest it. This intentionally happens
+// before the richer Win32 clipboard payload is installed.
+[[nodiscard]] bool publishBitmap(const std::vector<BYTE>& encodedBitmap,
+                                 DWORD settleMilliseconds = 450);
+
+} // namespace clipboard_history