Fix tray messages with different code page

src/misc.h

@@ -0,0 +1,32 @@
+#pragma once
+#include <string>
+
+#ifdef _WIN32
+#include <windows.h>
+
+std::string convertUtf8ToCurrentCodepage(const std::string& utf8Str) {
+	if (GetACP() == CP_UTF8) {
+		return std::string(utf8Str);
+	}
+  // Step 1: Convert UTF-8 to UTF-16
+  int utf16Len = MultiByteToWideChar(CP_UTF8, 0, utf8Str.c_str(), -1, NULL, 0);
+  if (utf16Len == 0) {
+      throw std::runtime_error("Failed to convert UTF-8 to UTF-16");
+  }
+
+  std::wstring utf16Str(utf16Len, L'\0');
+  MultiByteToWideChar(CP_UTF8, 0, utf8Str.c_str(), -1, &utf16Str[0], utf16Len);
+
+  // Step 2: Convert UTF-16 to the current Windows codepage
+  int codepageLen = WideCharToMultiByte(GetACP(), 0, utf16Str.c_str(), -1, NULL, 0, NULL, NULL);
+  if (codepageLen == 0) {
+      throw std::runtime_error("Failed to convert UTF-16 to current Windows codepage");
+  }
+
+  std::string codepageStr(codepageLen, '\0');
+  WideCharToMultiByte(GetACP(), 0, utf16Str.c_str(), -1, &codepageStr[0], codepageLen, NULL, NULL);
+
+  return codepageStr;
+}
+
+#endif