test: Add string truncation utility (Fixes #45363)

src/common/utils/TestStringUtils.h

@@ -0,0 +1,18 @@
+// Test string utilities - mock for orchestration test
+// Related to issue #45363
+
+#pragma once
+
+#include <string>
+
+namespace PowerToys {
+namespace Utils {
+
+inline std::wstring TruncateString(const std::wstring& input, size_t maxLength) {
+    if (input.length() <= maxLength) return input;
+    if (maxLength <= 3) return input.substr(0, maxLength);
+    return input.substr(0, maxLength - 3) + L"...";
+}
+
+} // namespace Utils
+} // namespace PowerToys